Re: [R] Opposite color in R

2015-07-25 Thread ken knoblauch
peter dalgaard gmail.com> writes: > > > > On 25 Jul 2015, at 21:49 , Atte Tenkanen utu.fi> wrote: > > > > Hi, > > > > I have tried to find a way to find opposite or complementary colors in R. > > > > I would like to form a color circle with R like this one: http://nobetty.net/dandls/ col

Re: [R] Help with GLM starting values in user defined link function

2014-10-23 Thread Ken Knoblauch
csiro.au> writes: > I'm trying to fit a binomial GLM with user defined link function (negative exponential), however I seem to > be unable to find the correct starting values to initialise such a model. I've tried taking starting > values from a logistic and log models fit to the same data an

Re: [R] outer() problem

2014-05-01 Thread Ken Knoblauch
Marc Girondot yahoo.fr> writes: > > outer(0:1, 0:1, FUN=function(x, y) {1}) > Erreur dans outer(0:1, 0:1, FUN = function(x, y) { : >dims [produit 4] ne correspond pas à la longueur de l'objet [1] Because whatever the dimensions of your 2 input vectors, this function simply returns the value

Re: [R] Generate Binary Matrix

2014-04-09 Thread ken knoblauch
Doran, Harold air.org> writes: > I am trying to generate a binary matrix where row in the matrix is guaranteed to have at least one 1. > Ideally, I would like most rowSums to be equal 2 or 3 with some 1s and some 4s. But, rowSums cannot be equal > to 0. > > I can tinker with the vector o

Re: [R] How do I perform conditional annotation of lattice panel plots?

2014-01-07 Thread Ken Knoblauch
Chen, George roswellpark.org> writes: > My apologies for asking this question that may have been asked before. I am trying to plot activity > dependent on time conditioned by the subject. Code for sample data below. > So I have something like this > xyplot(Activity~Time|Subject). > This works fi

Re: [R] Adding the complementary log-link to binomial() and make.link()

2013-11-07 Thread Ken Knoblauch
Roland Deutsch tuwien.ac.at> writes: > in my research I frequently work with binomial response models, which > are of course part of the generalized linear models. While I do use > common link functions such as the logit, probit and cloglog, I often > have the need of invoking the lesser-kno

Re: [R] Select fixed number of elements

2013-10-30 Thread Ken Knoblauch
Alaios yahoo.com> writes: > I have in my code some vectors that are not of equal size. I would like to be able for each of these vectors > select 6 elements that are (almost) equally spaced. So the first one would be at (or close) to the beginning > the last one at (or close) to the end and the

Re: [R] colour code areas of a plot

2013-10-22 Thread Ken Knoblauch
Martin Batholdy googlemail.com> writes: > I would like to colour different areas of a plot. > But I don't know how to do this efficiently. > > here an example: > (t = time) > > t <- 1:100 > bg_colors <- c(rep('green',20), rep('yellow',10), rep('green',20), rep('red',5), > rep('yellow',45)) >

Re: [R] speeding up

2013-10-21 Thread Ken Knoblauch
Ken Knoblauch inserm.fr> writes: > > Bos, Roger rothschild.com> writes: > > I am using a sum of squared differences in the > objective function of an optimization problem I am > doing and I > > have managed to speed it up using the > outer function ve

Re: [R] speeding up

2013-10-21 Thread Ken Knoblauch
Bos, Roger rothschild.com> writes: > I am using a sum of squared differences in the objective function of an optimization problem I am doing and I > have managed to speed it up using the outer function versus the nested for loops, but my suspicion is that > the calculation could be done even q

Re: [R] import function without overwriting function with the same name

2013-08-03 Thread Ken Knoblauch
Martin Batholdy googlemail.com> writes: > I have to import multiple R-files. > Each file consists of several functions with the same function name across the R-files. > When I import all files one by one (with source()) I overwrite the function definition of the previous file > until only the ve

Re: [R] grDevices::convertColor XYZ space is it really xyY?

2013-06-12 Thread Ken Knoblauch
On Jun 12, 2013, at 4:36 PM, Ken Knoblauch wrote: You seem to treating the input values as xyY when they should be XYZ (case matters). So, I would do something like this D65 <- c(0.3127, 0.329, 0.3583) X <- 100 * D65[1] Y <- 100 * D65[2] Z <- 100 * D65[3] XYZ <- data.frame

Re: [R] grDevices::convertColor XYZ space is it really xyY?

2013-06-12 Thread Ken Knoblauch
You seem to treating the input values as xyY when they should be XYZ (case matters). So, I would do something like this D65 <- c(0.3127, 0.329, 0.3583) X <- 100 * D65[1] Y <- 100 * D65[2] Z <- 100 * D65[3] XYZ <- data.frame(X = X, Y = Y, Z = Z) convertColor(XYZ, from = "XYZ", to = "sRGB")

Re: [R] measuring distances between colours?

2013-06-01 Thread Ken Knoblauch
I'd have to look it up and I'm not home at the moment. Can see later on. I would have thought that it would be normalized to have a jnd equal to 1 but I'm not sure. Ken Sent from my iPhone ___ Ken Knoblauch Inserm U846 Stem-Cell and Brain Research Institute 18 av du Doyen Lé

Re: [R] measuring distances between colours?

2013-06-01 Thread Ken Knoblauch
Hi John, Out of curiosity and if it is not much trouble, I would be curious if Luv worked any better than Lab. I think that Luv is supposed to be preferred for monitors and Lab for surfaces but they are generally pretty similar. Best, Ken Sent from my iPhone ___ Ken Knoblauch Inserm U846

Re: [R] measuring distances between colours?

2013-05-30 Thread Ken Knoblauch
John Fox mcmaster.ca> writes: > I'm interested in locating the named colour that's "closest" to an arbitrary RGB colour. The best that I've > been able to come up is the following, which uses HSV colours for the comparison: > > r2c <- function(){ > hexnumerals <- 0:15 > names(hexnumeral

Re: [R] plotting CIE chromaticity diagram?

2013-03-18 Thread Ken Knoblauch
t Ken points out (and I do appreciate him making these points). One can readily demonstrate the gamut limitations by printing the diagram Ishida links to on different devices. My hope is to get something close and include a disclaimer. Bryan On Mar 18, 2013, at 7:08 AM, Ken Knoblauch

Re: [R] plotting CIE chromaticity diagram?

2013-03-18 Thread Ken Knoblauch
ishi soichi gmail.com> writes: > Has anyone plotted or is it possible to plot > > CIE *xy* chromaticity diagram > > http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg > > I need this plot in color. > > ishida And following up on my previous mail (diatribe), after having contemplated th

Re: [R] plotting CIE chromaticity diagram?

2013-03-18 Thread Ken Knoblauch
ishi soichi gmail.com> writes: > Has anyone plotted or is it possible to plot > > CIE *xy* chromaticity diagram > > http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg > > I need this plot in color. > > ishida > I think that plotting the spectral locus and the line of purples is trivial,

Re: [R] how to suppress the intercept in an lm()-like formula method?

2013-01-29 Thread Ken Knoblauch
Michael Friendly yorku.ca> writes: > > To partly answer my own question: It wasn't that hard to hack the > result of model.matrix() to remove the intercept, > > remove.intercept <- function(x) { > if (colnames(x)[1] == "(Intercept)") { > x <- x[,-1] > attr(x,

Re: [R] [lattice] how to label panels with variable value (not name)?

2012-11-18 Thread Ken Knoblauch
14.3 Hmisc_3.10-1 R2HTML_2.2 svMisc_0.9-65 TinnR_1.0-5tools_2.15.2 -- Bert On Sun, Nov 18, 2012 at 8:09 AM, Ken Knoblauch wrote: Tom Roche pobox.com> writes: As described @ <<< clipped >>> However I will need to before-and-after compare this to the r

Re: [R] [lattice] how to label panels with variable value (not name)?

2012-11-18 Thread Ken Knoblauch
lattice with the _value_ of the level (an > atmospheric pressure), rather than the name or index of the level. > How to do that? > > TIA, Tom Roche pobox.com> maybe, see ?strip.custom in lattice -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integ

Re: [R] history and readline, Mac OSX

2012-10-17 Thread Ken Knoblauch
vice? Try looking at http://R.research.att.com/libs/ > > TIA -- Christian > -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33

Re: [R] blank plot----how do I make symbols appear

2012-09-28 Thread Ken Knoblauch
Jessica da Silva gmail.com> writes: > I am trying to create a scatterplot, coding each point to one of 5 > populations. I was successful when I did this for one set of data, yet > when I try plotting other data a blank plot appears (although the axes are > labelled and I can fit the regression

Re: [R] self-starter functions for y = a + b * c^x

2012-08-14 Thread ken knoblauch
Christof Kluß email.uni-kiel.de> writes: > But now I search a self-starter for y = a + b * c^x > > Do you know a package that implement such self-starter or is there a > easy way to do it myself? You might be able to adapt the SS.calib function from the psyphy package for this. It was design

[R] [R-pkgs] new package MPDiR version 0.1-11

2012-08-07 Thread Ken Knoblauch
es several data sets from published psychophysical experiments using detection and rating scale measures for estimating signal detection parameters, psychometric functions, classification images, etc. Best, Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of I

Re: [R] Seeking help with LOGIT model

2012-04-12 Thread Ken Knoblauch
rstand what you mean by "You seem to be getting complete separation on X5 "? Can you please be more elaborate? Thanks, On Thu, Apr 12, 2012 at 4:06 PM, ken knoblauch wrote: Christofer Bogaso gmail.com> writes: Dear all, I am fitting a LOGIT model on this Data...

Re: [R] Seeking help with LOGIT model

2012-04-12 Thread ken knoblauch
Christofer Bogaso gmail.com> writes: > Dear all, I am fitting a LOGIT model on this Data... << snip >>--- > glm(Data[,1] ~ Data[,-1], binomial(link = logit)) > > Call: glm(formula = Data[, 1] ~ Data[, -1], family = binomial(link = logit)) > > Coefficients: > (Intercept) Data[, -

Re: [R] Apply function to every 'nth' element of a vector

2012-04-05 Thread ken knoblauch
ken knoblauch inserm.fr> writes: > > Michael Bach gmail.com> writes: > > how do I e.g. square each second element of a > vector with an even > > number of elements? Or more generally to > apply a function to every > > 'nth' element of a vec

Re: [R] Apply function to every 'nth' element of a vector

2012-04-05 Thread ken knoblauch
example: > v <- c(1, 2, 3, 4) > mysquare <- function (x) { return (x*x) } > w <- applyfun(v, mysquare, 2) > then w should be c(1, 4, 3, 16) > Michael Bach Hi Michael, v^(2 - seq_along(v) %% 2) [1] 1 4 3 16 Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research

Re: [R] User defined link function with extra parameters

2012-03-01 Thread ken knoblauch
t; Is there any way to tell glm() to add this > parameter in the estimation or do I have to write my own estimator with > optim()? If the parameter cannot be made into a coefficient of the linear predictor, then I'm afraid that you will have to roll your own. > Thanks, > &g

Re: [R] How to get intersection of multiple vectors?

2012-02-02 Thread ken knoblauch
How can I do then? > > What I know is only for 2 vectors via "intersect" function, but don't know how to deal with multiple vectors. > Reduce(intersect, list(v1 = c("a","b","c","d"), v2 = c("a","b&quo

Re: [R] clear plot linear mixed model

2012-01-05 Thread ken knoblauch
Christof Kluß email.uni-kiel.de> writes: > Am 02-01-2012 10:54, schrieb ken knoblauch: > > Christof Kluß email.uni-kiel.de> writes: > >> lme<- lme(conc ~ name/time - 1, > >> random=conc~time|nr,method="ML",data=measurements) > > see pl

Re: [R] clear plot linear mixed model

2012-01-02 Thread ken knoblauch
me) and > seperate colors for the measurements (nr). > > How would you do that? > > thx > Christof > see plot.augPred in the nlme package -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine

Re: [R] palettes for the color-blind

2011-11-03 Thread Ken Knoblauch
ibm.com/dx/proceedings/ pravda/truevis.htm who was (is) quite concerned with this issue, as well, as the excellent article by Zeileis, Hornik and Murrell http://statmath.wu.ac.at/~zeileis/papers/ Zeileis+Hornik+Murrell-2009.pdf HTH, Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research

Re: [R] Plotting a polygon with xyplot

2011-10-04 Thread Ken Knoblauch
ot;http://r.789695.n4.nabble.com/file/n3870788/111004_Lode_Outlines.csv";, header = TRUE,sep = ",",) par(mfrow = c(1, 2), pty = "s") plot(z ~ y, Data_poly, type = "l") fh <- with(Data_poly, which(z > 240)) D_poly <- rbind(Data_poly[fh, ], Data_poly[-rev(fh), ]) D_

Re: [R] how to incorporate prior base probabilities into binomial glmm

2011-02-18 Thread Ken Knoblauch
you describe, the subjects are nested in this, i.e., some had a high effort of 5 and others of 3. Perhaps, the following would work then glmer(y ~ EffortLevel/(effort + costs + scr) + (1 | id), family = binomial) I think that if each observer has a unique id, that the nesting will be automatic for

Re: [R] reading a matlab file

2011-02-18 Thread Ken Knoblauch
in the documentation of the R.matlab package. -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http:

Re: [R] sensitivity logical operators in R

2011-01-23 Thread Ken Knoblauch
ou all! This list is pleasure!!! > > Marc > But, try all.equal(tt, t) [1] TRUE and see the R FAQ 7.31 -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0

Re: [R] Deselect one of the array's matrix

2011-01-06 Thread Ken Knoblauch
> How can I do that? > > I would like to thank you in advance for your help > Best Regards > Alex > > > [[alternative HTML version deleted]] Read section 2.7 of An Introduction to R that comes with the distribution. -- Ken Knoblauch Inserm U846 Stem-cell a

Re: [R] Still confused with lapply

2010-11-19 Thread Ken Knoblauch
eturn(c(v,w)) > } > > # The following for loop works > result<-data.frame() > for (i in 1:length(df1[,1])) { > result<-rbind(result,fcttest(df1[i,1],df1[i,2],df1[i,3])) why bother with lapply when you can just do this with(df1, cbind(df1[[1]] * df1[[2]], df1[[2]] + df1[[3]

Re: [R] Several Lattice plots in one Plot

2010-09-30 Thread Ken Knoblauch
s to do this but how about DTA <- cbind(day = dta$day, stack(dta[, -1])) xyplot(values ~ day | ind, DTA, type = "b", layout = c(2, 6)) for which you can add additional annotations as desired. By the way, do you realize that you have repeated column names in your data frame?

Re: [R] R package to identify model

2010-09-07 Thread Ken Knoblauch
Peng, C gmail.com> writes: > > > what is ESP package? Thanks. I've heard that It's only available over from a repository accessible through a next-generation wifi system call oui-ja. (Beware humor travels poorly over the internet and across linguistic differences!).

Re: [R] Stack with factors

2010-04-01 Thread Ken Knoblauch
n verify for yourself that a factor yields FALSE here x <- db1[[1]] is.vector(x) [1] FALSE so I think that this at least explains why it doesn't work as you expected. > Thank you for your help. > > Kenneth -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department o

Re: [R] Direction and scaling of cumulative distribution in ecdfplot

2010-03-14 Thread Ken Knoblauch
- function(x, logY = TRUE, ...) { xy <- ecdflt(x) if (logY) xy[, 2] <- log10(xy[, 2]) panel.xyplot(xy[, 1], xy[, 2], ...) } xyplot(X ~ X | F, panel = function(x, y = NULL, ...){ panel.ecdflt(x, ...) }) > > Many thanks, > Jeff > > -- > Jeff Stevens

Re: [R] lty dots pdf issue

2010-02-19 Thread Ken Knoblauch
Roger Koenker uiuc.edu> writes: > I'm trying to redo an old plot with: > > sessionInfo() > R version 2.11.0 Under development (unstable) (2010-02-09 r51113) > x86_64-apple-darwin9.8.0 > When I do: > > pdf("lty.pdf",height = 6, width = 8) > u <- 1:100/100 > y <- matrix(rep(1:10,each = 100),100)

Re: [R] NextMethod() example from S Programming by Vena bles and Ripley (page 78)

2010-02-13 Thread Ken Knoblauch
lass(x)=c('c1','c2') > test(x) It works fine for me if you add a default method, which I think is what it is looking for. test.default <- function(x){ cat("default") x } test(x) c1 c2 default[1] 1 attr(,"class") [1] "c1" "c2" --

Re: [R] Sweave, lty = 3 line incorect in pdf output

2010-02-11 Thread Ken Knoblauch
ame output which looks ok. Just for the record... Z R> sessionInfo() R version 2.10.1 (2009-12-14) i486-pc-linux-gnu locale: [1] C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] fortunes_1.3-7 On Thu, 11 Feb 2010

Re: [R] Sweave, lty = 3 line incorect in pdf output

2010-02-11 Thread Ken Knoblauch
ld the same output which looks ok. Just for the record... Z R> sessionInfo() R version 2.10.1 (2009-12-14) i486-pc-linux-gnu locale: [1] C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] fortunes_1.3-7 On Thu, 11 Feb

Re: [R] Fast way to determine number of lines in a file

2010-02-08 Thread Ken Knoblauch
Hadley Wickham rice.edu> writes: > > Hi all, > > Is there a fast way to determine the number of lines in a file? I'm > looking for something like count.lines analogous to count.fields. > > Hadley How about something like length(readLines(fname)) Ken _

Re: [R] color blending and transparency

2010-02-03 Thread Ken Knoblauch
and in R, it is some uncalibrated combination of frame buffer values that is being used. > Best, > > baptiste > Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)

Re: [R] term.formula error when updating an nls object

2010-01-27 Thread Ken Knoblauch
st^ex/(Contrast^fx + sig^fx)), start = list(Rm = 30, sig = 0.05, ex = 3, fx = 3.1)) -Peter Ehlers Ken Knoblauch wrote: Hi, I'm getting an error that I don't understand when updating an nls object. Here is a toy example. dd <- structure(list(Contrast = c(0.0

[R] term.formula error when updating an nls object

2010-01-27 Thread Ken Knoblauch
onInfo() R version 2.10.1 Patched (2010-01-25 r51051) i386-apple-darwin9.8.0 locale: [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods [7] base Thanks, in advance, for any help. Ken -- Ken Knoblauch Ins

Re: [R] Problem with expand.grid

2009-12-22 Thread Ken Knoblauch
3 823 933 or just vectors expand.grid(1:3, 1:3) Var1 Var2 111 221 331 412 522 632 713 823 933 -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18

Re: [R] Getting Rd pages right for redefined S3 generic

2009-12-18 Thread Ken Knoblauch
.frame") so that they would still inherit other data frame methods. My rbind.mlds.df works fine with them, and I document it accordingly. HTH. Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bro

Re: [R] How do I run to or more R consoles on Mac OS X?

2009-11-30 Thread Ken Knoblauch
ons/R.app to open as many copies of the app as you like. Be careful though, because these inherit environment variables from the terminal session, not necessarily the same as those when running the app from the Finder. I was bitten by that the first time I tried this. Ken -- Ken Knoblauch Inser

Re: [R] design matrix construction question

2009-11-02 Thread Ken Knoblauch
0 0 5 0 0 6 0 0 7 0 1 8 0 1 attr(,"assign") [1] 1 1 attr(,"contrasts") attr(,"contrasts")$z [1] "contr.treatment" > > thanks > > Ben Bolker > > > > -- Ken Knoblauch Inserm U846 Stem-cell

Re: [R] dichromat, regexp, and grid objects

2009-09-30 Thread Ken Knoblauch
aking, the dichromat package is of great value in avoiding color choices that about 1% of the population would have trouble discriminating. Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron Fran

Re: [R] How to convert numbers to words?

2009-09-14 Thread Ken Knoblauch
of a function that does this? > > Thanks, > Derek McCrae Norton Try Rnews Volume 5/1, May 2005, The Programmer's Niche by John Fox How Do You Spell That Number? -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue d

[R] [R-pkgs] new package MLCM: Maximum Likelihood Conjoint Measurement

2009-09-10 Thread Ken Knoblauch
desirability. This package contains tools to estimate the additive contribution of the n scales to the judgment by a maximum likelihood method under several hypotheses of how the perceptual dimensions interact. -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative

Re: [R] Compare lm() to glm(family=poisson)

2009-08-01 Thread Ken Knoblauch
default hypothesis when fitting with lm. Also, the default link function with the poisson family is log. So, these are things to take into account in any potential comparison. Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du

Re: [R] Question regarding package submission to CRAN

2009-07-16 Thread Ken Knoblauch
that the responsible person is on vacation... -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http://www.sbri.

Re: [R] overshoot of formula line in summary output of Sweave

2009-06-19 Thread Ken Knoblauch
Ben Bolker ufl.edu> writes: > >> > Here is a toy example that illustrates the overshoot of the formula > >> > \documentclass[12pt]{article} > >> > \usepackage{geometry} > >> > \geometry{left=2in,right=2in} > >> > \begin{document} > >> > <>= > >> > op <- options(width = 65, digits = 3) > >> > ddata

Re: [R] overshoot of formula line in summary output of Sweave

2009-06-18 Thread Ken Knoblauch
Ben Bolker ufl.edu> writes: > > In the Sweave output for summary for several types > > of model objects and also for the comparison of models > > with anova, I find that that the display of the call(s) > > or formula does not obey the width option, even with > > keep.source=TRUE set, so that a lon

[R] overshoot of formula line in summary output of Sweave

2009-06-16 Thread Ken Knoblauch
B = factor(letters[1:2]), C = factor(LETTERS[1:5]), S = factor(paste("S", 1:10, sep = "")), R = rnorm(10)) mod1 <- lm(R ~ A + B + C + S, ddataframe) summary(mod1) @ \end{document} I have attached the pdf output. Thanks,

Re: [R] Splicing factors without losing levels

2009-06-09 Thread Ken Knoblauch
lx <- levels(x) ly <- levels(y) lxy <- union(lx, ly) xy <- cbind(levels(x)[x], levels(y)[y]) xy <- t(xy) dim(xy) <- NULL xy <- factor(xy, levels = lxy) xy } > splice.factor(factor(1:3), factor(4:6)) [1] 1 4 2 5

Re: [R] reliability, scale scores in the psych package

2009-03-10 Thread Ken Knoblauch
Doran, Harold air.org> writes: > > Ista > > There are several functions in the MiscPsycho package that can be sued > for classical item analysis. > Since when is classical item analysis a crime? No wonder the USA is considered such a litigious society! Ken -- Ken

Re: [R] difference between assignment syntax <- vs =

2009-02-23 Thread Ken Knoblauch
eave spaces around the = than it would be for <-. > > the reason being ...? > > vQ > ergonomy! -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax:

Re: [R] Matrix package: band matrix

2009-02-20 Thread Ken Knoblauch
8224 . [4,] . . -1.007848357 -0.1117796 -0.5555834 [5,] . . . -0.6816979 -0.6052127 Ken -- Ken Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France te

Re: [R] parsing problem

2009-02-02 Thread Ken Knoblauch
Ken Knoblauch inserm.fr> writes: > > venkata kirankumar gmail.com> writes: > > I am trying to parse a vector for caliculating minimum in that vector the > > vector having values like > > > > 1Kontrolle > > 2 Placebo > >

Re: [R] parsing problem

2009-02-02 Thread Ken Knoblauch
olle is being treated as a factor so you are seeing only the codes of the levels. There is probably something more elegant, but you need something like, as.numeric(sapply(with(dd, strsplit(levels(Placebo)[Placebo], "m")), "[[", 1)) -- Ken Knoblauch Inserm U846 Institut Cellul

Re: [R] R for Computational Neuroscience?

2009-01-25 Thread Ken Knoblauch
nnectivity in neural systems. There are also packages for analysing psychophysical data which are relevant for behavioral neuroscience, psyphy, MLDS, sdtalt, etc. Would there be enough for CRAN TASK VIEW? Ken -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neurosciences

Re: [R] glm binomial loglog (NOT cloglog) link

2009-01-23 Thread Ken Knoblauch
te a user-specified link and the source of the make.link function can be useful to. Ken -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neurosciences Intégratives 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 por

Re: [R] Predictions with GAM

2009-01-16 Thread Ken Knoblauch
Ken Knoblauch inserm.fr> writes: > Robbert Langenberg gmail.com> writes: > > I am trying to get a prediction of my GAM on a response type. So that I > > eventually get plots with the correct values on my ylab. > > The problem I am encountering now is that I cannot seem

Re: [R] Predictions with GAM

2009-01-16 Thread Ken Knoblauch
and the by term, something like model.matrix(~ day:mapID - 1, data = mergeday) in your case. I added the appropriate columns into my data frame and also to the newdata for predict. You can see an example in the appendix of http://www.journalofvision.org/8/16/10/ HTH, Ken -- Ken

Re: [R] boxplot via plot command

2008-12-02 Thread Ken Knoblauch
abel1",100), rep("label2",50), rep("label3",150)) > df <- data.frame(as.factor(l), x) > plot(df) Just to complete my response, the documentation for plot.data.frame indicates For a two-column data frame it plots the second column against the first by the most a

Re: [R] boxplot via plot command

2008-12-02 Thread Ken Knoblauch
Hi, Antje yahoo.de> writes: > > Hi folks, > > I've just discovered that the following code leads to boxplot > (surprisingly to me). > Can anybody explain to me why? Is this documented somewhere? I've never > consider this option before. > > x <- rnorm(300) > l <- c(rep("label1",100), rep("lab

Re: [R] Fitting a modified logistic with glm?

2008-11-09 Thread Ken Knoblauch
might try the link mafc.logit(m = 2) defined in the psyphy package. Continuing with your example, library(psyphy) fit <- glm(y ~ x, binomial(mafc.logit(2)), control = glm.control(maxit = 100)) # default didn't converge x.ord <- order(x) lines(x[x.ord], fitted(fit)[x.ord], col = &q

Re: [R] Fw: It 's correct to do contrasts for a GLM?

2008-10-23 Thread Ken Knoblauch
Ken Knoblauch inserm.fr> writes: > > Susana Zuloaga hotmail.com> writes: > > > > > Hi all > > > > I am one recent user of R and have a few doubts > > I did a binomial GLM with 3 - factor and now I have to test contrasts to > > iden

Re: [R] Fw: It 's correct to do contrasts for a GLM?

2008-10-23 Thread Ken Knoblauch
is not incorrect to use them in GLM? there is a way to do > contrasts between treatments for GLM as a Tukey for the ANOVA? > > Susana see https://stat.ethz.ch/pipermail/r-help/2003-November/041559.html -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neuros

Re: [R] using complete.cases() with nested factors

2008-09-04 Thread Ken Knoblauch
Andrew Barr gmail.com> writes: > This maybe a newbie question. I have a dataframe that looks like the sample > at the bottom of the email. I have monthly precipitation data from several > sites over several years. For each site, I need to extract years that have > a complete series of 12 mon

Re: [R] Multiple R console for OS X?

2008-08-02 Thread Ken Knoblauch
Anh Tran ucla.edu> writes: > I always open more than 1 R console in Windows. I can't figure out a way to > do this with OS X yet. I need that to utilize the duo core on my desktop. > How would I do that? > Have a look here https://stat.ethz.ch/pipermail/r-sig-mac/2008-April/004814.html __

Re: [R] counting number of "G" in "TCGGGGGACAATCGGTAACCCGTCT"

2008-07-15 Thread Ken Knoblauch
Daren Tan hotmail.com> writes: > Any better solution than this ? > sum(strsplit("TCGACAATCGGTAACCCGTCT", "")[[1]] == "G") Try table(strsplit("TCGACAATCGGTAACCCGTCT", "")) A C G T 5 7 8 5 and get all 4 at once. HTH -- K

Re: [R] building experimental paradigm with R as "Brainard/Pelli PsychToolbox"

2008-07-09 Thread Ken Knoblauch
mple, my own psyphy and MLDS). Ken -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neurosciences Intégratives 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84

Re: [R] expand.grid() function

2008-06-23 Thread Ken Knoblauch
Megh Dal yahoo.com> writes: > I have one question on expand.grid() function. > When I write following syntax :expand.grid(c("u", "l"), >c("u", "l"), c("u", "l")) I get following as > desired : > Var1 Var2 Var3 > 1uuu > 2luu > 3ulu > 4llu > 5

Re: [R] grouping values

2008-06-23 Thread Ken Knoblauch
Ken Knoblauch inserm.fr> writes: > Daren Tan hotmail.com> writes: > > I tried aggregate, apply etc, but can't get the right result. > do.call("expand.grid", rep(list(c("u", "l")), 3)) > Var1 Var2 Var3 > 1uuu > 2l

Re: [R] grouping values

2008-06-23 Thread Ken Knoblauch
t;[3,] "cc" "C|E" > How about do.call("expand.grid", rep(list(c("u", "l")), 3)) Var1 Var2 Var3 1uuu 2luu 3ulu 4llu 5uul 6lul 7ul

Re: [R] Conditional ploting with logical vector

2008-04-05 Thread ken knoblauch
Armin Goralczyk gmail.com> writes: > In a function I have a plot and want to add symbols/text only when > indicated by a logical vector (which was generated by the function > before, not manually like in the following example): > > plot(1:10, 1:10) > lv <- c(T,T,T,F,F,F,T,T,T,F) > text(1:10, 1:10

Re: [R] help with R semantics

2008-04-03 Thread Ken Knoblauch
Hi, Charles Annis, P.E. StatisticalEngineering.com> writes: > logit.FC <- function(POD.floor = 0, POD.ceiling =1) > { if (POD.floor < 0 | POD.floor > 1) stop ("POD.floor must be between zero > and one.") > if (POD.ceiling < 0 | POD.ceiling > 1) stop ("POD.ceiling must be > between zero and

Re: [R] Importing an Excel spreadsheet

2008-03-20 Thread ken knoblauch
andy dsl.pipex.com> writes: > I am trying to import an *.xls spreadsheet into R. I am doing this as > follows: > > read.table(file("A5_DL.xls")) > So I copied it all over to a text document and tried to import that, thus: > > read.table("A5.txt") > The error I got then was: > Error in scan(file

Re: [R] [OT] "normal" (as in "Guassian")

2008-03-02 Thread Ken Knoblauch
Johannes Hüsing huesing.name> writes: > > Am 02.03.2008 um 17:44 schrieb Gabor Csardi: > > > I'm not a statistician, but do i remember well that among all > > distributions with a given mean and variance, the normal distribution > > has the highest entropy? This is good enough for me to call it

Re: [R] Loop with variable index

2008-01-30 Thread Ken Knoblauch
csiro.au> writes: > > y <- sort(rnorm(20)) # say... > > m <- s <- numeric(19) > > for(i in 2:20) { > m[i-1] <- mean(y[1:i]) > s[i-1] <- sd(y[1:i]) > } > -Original Message- > On Behalf Of cvandy > Subject: [R] Loop with variable index > I have a list of 20 values. The fir

Re: [R] color palette from red to blue passing white

2007-12-04 Thread Ken Knoblauch
hadley wickham gmail.com> writes: <<>> >For example, I have this alpha function in > ggplot: > alpha <- function(colour, alpha) { > col <- col2rgb(colour, TRUE) / 255 > col[4, ] <- rep(alpha, length(colour)) > new_col <- rgb(col[1,], col[2,], col[3,], col[4,]) > new_col[is.na(colour)] <- N

Re: [R] Packages - a great resource, but hard to find theright one.

2007-11-21 Thread Ken Knoblauch
en what about http://finzi.psych.upenn.edu/R/doc/html/packages.html which allows you to go in a little deeper and see the help pages of each function and http://cged.genes.nig.ac.jp/RGM2/index.php HTH ken -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neu

Re: [R] Plot segments with different colors

2007-11-13 Thread Ken Knoblauch
Dimitris Rizopoulos med.kuleuven.be> writes: > > the 'col' argument of plot() may also be a vector, e.g., > > x <- sort(rnorm(15)) > y <- rnorm(15) > plot(x, y, > col = rep(c("red", "blue", "magenta"), c(5, 6, 4))) > Dimitris > > > Dimitris Rizopoulos > > - Original Message

Re: [R] Summary vs fivenum results for Q3

2007-10-09 Thread Ken Knoblauch
uses the quantile function and then looking at fivenum to see that it did not. Looking at the help for fivenum led me to boxplot.stats where I was that it w as not necessarily doing the same thing. HTH -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Dép

Re: [R] window (x,y) co-ordinates of datapoints

2007-10-09 Thread Ken Knoblauch
ts for most measurements, so one day you may be able to > do that in whatever passes for par() by then. > > Duncan Murdoch For anyone interested, there is a larger selection of units online here, as well as other places, http://en.wikipedia.org/wiki/SI_prefix upon seeing which, I wo

Re: [R] Sweave and ggplot2

2007-09-25 Thread Ken Knoblauch
Julien Barnier no-log.org> writes: > > Hi, > When I try this example at work, I got an error message during Sweave > which is close from something like "warning : semitransparency not > supported by this device". When I try at home (with the given > sessionInfo), I got no warning but in both the

Re: [R] nls fits by groups

2007-09-23 Thread Ken Knoblauch
Aleksi Lehtonen gmail.com> writes: > I am trying to estimate several non-linear models simultaneously. I don't > want to use non-linear mixed model, but non-linear model with same form, but > it should be estimated separately according to variable group (I have lots > of groups that have lots of