[R] about R square

Hi, I am simply asking about coefficient od determination(R square), is its value more than 1 also posiible. Because it ranges from 0-1. So I want to know that R squre may be more than one. If yes what is its interpretation. Thanking to all of You(R help group). -- Nitish Kumar Mishra Junior Rese

[R] about R square value

Hi, I am simply asking about coefficient od determination(R square), is its value more than 1 also posiible. Because it ranges from 0-1. So I want to know that R squre may be more than one. If yes what is its interpretation. Thanking to all of You(R help group). -- Nitish Kumar Mishra Junior Rese

[R] about R square value

Hi, I am simply asking about coefficient od determination(R square), is its value more than 1 also posiible. Because it ranges from 0-1. So I want to know that R squre may be more than one. If yes what is its interpretation. Thanking to all of You(R help group). -- Nitish Kumar Mishra Junior Re

[R] queries

Dear Help Desk, Is there any way to change some of the labels on R diagrams? Specifically in histograms, I would like to: 1. change the word frequency to count. 2. Make the font of the title (Histogram of …) smaller. 3. Have a different w

[R] LaTeX, Sweave, Lattice and Computer Modern fonts

Dear useRs, I am pretty sure the answer to my question is out there if I would just take the time to cross-correlate information that's scattered among different email exchanges, useR! presentations, Paul Murrel's website and assorted posters, but would some charitable soul be so kind as to explai

[R] extracting the mode of a vector

Hello, I have an elementary question (for which I couldn't find the answer on the web or the help): how can I extract the mode (modal score) of a vector? Thanks in advance for your help. [[alternative HTML version deleted]] __ R-help@stat.math

[R] exemple pour l'AFD

Bonjours monsieurs Je suis un étudient en 4eme année informatique a l’universite djilali liabes SBA ALGERIE. Je suis entrain de préparer un exposé sur l’AFD et j’ai besoin d’un exemple sous R pour bien présenter mon travail. __ R-help@stat.math.ethz.ch

[R] Hola

Ey! Tienes q echarle un ojo a mi nuevo vicio en internet...estoy tan seguro de q te va a gustar q te he registrado...sólo falta tu confirmación! ya me cuentas! ;) http://eu1.badoo.com/01738976/in/82997 Esta invitación ha sido enviada con fecha 22/04/07 16:09 a ; a petición de Guillermo Va

Re: [R] queries

First of all, this is not a "Help Desk". Second, please make sure that you put an informative subject line: I thought this was spam and was going to delete it. Thanks, Ranjan On Sat, 21 Apr 2007 12:03:24 -0700 (PDT) Nima Tehrani <[EMAIL PROTECTED]> wrote: > Dear Help Desk, > > Is there

[R] rmultinom

Hi Can anyone help me? I am not an experienced R user (or statistician!). If I use rmultinom to generate random outcomes of a multinomial distribution, how do i use these in a way to help conduct an exact chi-squared test? woozles48 -- View this message in context: http://www.nabble.com/rmultino

[R] distance method in kmeans

I am trying to cluster some binary data using k-means . As the regular "kmeans" available from stats package in R does'nt provide the option to change the distance method. I was wondering there is any package available to specify type of distance measure to be used in k means clustering in R. E

Re: [R] distance method in kmeans

Chandra You could try clustan graphics, cheap and awesome with plenty of preprocessing capabilities of matrices. Given this is one of R's strengths (matrix programming) I would imagine there is code out there that would enable you to generate a matrix for use in k-means. Typically, what I wou

[R] How to add e.g. lines to a zoo plot?

Hi all, a problem I encounter again and again: I plot a zoo object using "plot" and then want to add lines or points to this plot. I usually circumvent this problem by adding artificial coloumns to the zoo object before plotting, but I am sure there's a better solution. To be specific: Assume

Re: [R] How to add e.g. lines to a zoo plot?

You need to use the panel= argument. There are examples in ?plot.zoo For your example its like this (make sure you are using the latest version of zoo, 1.3-0, for this): x <- as.Date(c("2002-01-01","2003-01-01","2004-01-01")) y.zoo <- zoo(cbind(y1 = c(1,2,3),y2=c(3,4,3)),order.by=x) pnl <- funct

Re: [R] queries

On Sat, 2007-04-21 at 12:03 -0700, Nima Tehrani wrote: > Dear Help Desk, > > Is there any way to change some of the labels on R diagrams? > > Specifically in histograms, I would like to: > > 1. change the word frequency to count. > 2. Make the font of

[R] Descision boundary in MASS LDA

Hi, Is anyone able to give me references or explain how the "decision boundary" is calculated by the LDA function in MASS. e.g. p 335-336 of MASS 4th Ed. Since it's curved I'm assuming they're doing something like fitting 2-D Gaussians to the groups and plotting the contour line describing the

[R] labels

Hello, I would like to add to axis labels special caracters. Instead of writing :plot(simul, xlab="beta", ylab="sigma11") It would be great if I could write something as in LaTeX :plot(simul, xlab="\beta", ylab="\sigma_{11}") Is there a way to do that ? Thank you ___

Re: [R] labels

Hi, try this: plot(simul, ylab=expression(beta), xlab=expression(sigma)) -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O On 4/22/07, [

Re: [R] queries

hist(rnorm(100),xlab="Data",ylab="Count",main="") title(main="Histogram of ...",cex=0.5) see ?par for details on xlab, ylab, main, and cex arguments. You can call these from title() or include them in hist(). I called title(main=..) separately to control its size separately from the rest of the te

[R] Open source community help-desks

I read the reply earlier in which Nima was "naughty-naughty"'d for calling us a Help Desk. And, I have to admit that I agree. But then, an open-source listserv is, in essence, a help deskwell, maybe not a desk, but we do help each other. My conflicting feelings about this are better left for

[R] Intro and a Question

Hello r-help! My name is Dan McGoldrick, I am a statistical geneticist and I work with ontologies, AI and general genetic data analysis. I was wondering aabout the tryCatch function -- don't really understand the implimentation... What I would like to do is within an R API, test a mysql connec

Re: [R] Using R to create pdf's from each file in a directory

On Fri, 20-Apr-2007 at 11:10PM -0500, Jeffrey Horner wrote: |> workdir <- '/tmp/data' |> for (x in dir(workdir,pattern='.csv$')){ |>d <- read.table(paste(workdir,'/',x,sep=''), sep="\t", header=TRUE) If they're CSV files, I don't think sep = "\t" will be correct. Try "," best -- ~.~.~.~.~

Re: [R] queries

My apologies. Second line should be title(main="Histogram of ...",cex.main=0.5) Actually I just realized you can also do hist(rnorm(100),xlab="Data",ylab="Count",cex.main=0.5) ...this way you don't have to call title() separately. --- Stephen Tucker <[EMAIL PROTECTED]> wrote: > hist(rnorm(100

[R] names( d$columnname )

dear R wizards --- would it make sense for names(d$columnname) to be "columnname"? I can preserve the columnname through x=subset(dataset, select="columnname"), of course, but it would seem that x=d$columnname could also do this. No? Sincerely, /iaw ___

Re: [R] names( d$columnname )

On 4/22/2007 5:46 PM, ivo welch wrote: > dear R wizards --- would it make sense for names(d$columnname) to be > "columnname"? I can preserve the columnname through x=subset(dataset, > select="columnname"), of course, but it would seem that x=d$columnname > could also do this. No? Sincerely, /i

[R] Random Forest

Hi, I am trying to print out my confusion matrix after having created my random forest. I have put in this command: fit<-randomForest(MMS_ENABLED_HANDSET~.,data=dat,ntree=500,mtry=14, na.action=na.omit,confusion=TRUE) but I can't get it to give me the confusion matrix, anyone know how this works?

Re: [R] names( d$columnname )

yes, this was what I was asking for. I had the notion that one could tag almost anything with a name, and did not appreciate the scope for confusion. thank you for the explanation. regards, /ivo On 4/22/07, Duncan Murdoch <[EMAIL PROTECTED]> wrote: > On 4/22/2007 5:46 PM, ivo welch wrote: > >

[R] Help on manipulating a data frame

Hi R-experts, I have a large set of weekly data in this format: 2007-01-05 -1.52377151 2007-01-12 1.04787390 2007-01-19 0.61647047 2007-01-26 1.87864283 2007-02-02 0.54992405 2007-02-09 1.96850069 2007-02-16 0.26850159 2007-02-23 1.56305144 2007-03-02 -4.19500573 2007-03-09 0.77127814

Re: [R] names( d$columnname )

On Sun, 22 Apr 2007, ivo welch wrote: > yes, this was what I was asking for. I had the notion that one could > tag almost anything with a name, and did not appreciate the scope for > confusion. thank you for the explanation. regards, /ivo > You haven't told us why you want this behavior. If w

[R] Problem with dgamma ?

Hi All, Here 's what I got using dgamma function : > nu<-.2 > nu*log(nu)-log(gamma(nu))+(nu-1)*log(1)-nu*(1) [1] -2.045951 > dgamma(1,nu,nu,1) [1] 0.0801333 > dgamma(1,nu,nu,0) [1] NaN Warning message: NaNs produced in: dgamma(x, shape, scale, log) Could anyone tell me what is wrong her

[R] Estimates at each iteration of optim()?

I am trying to maximise a complicated loglikelihood function with the "optim" command. Is there some way to get to know the estiamtes at each iteration? When I put "control=list(trace=TRUE)" as an option in "optim", I just got the initial and final values of the loglikelihood, number of iteratio

Re: [R] Help on manipulating a data frame

Do you mean you want to return the first row for each mont for which the value > 0? In that case try this. The first group of lines recreates your data frame and calls it DF. by causes f to operate on a subset of rows comprising one month extracting the first row for which the value is positive

Re: [R] Problem with dgamma ?

dgamma(x=1, shape=nu, rate=nu, log=TRUE) [1] -2.045951 This is a good example of why you should call parameters by name. Ted. Tong Wang wrote on 04/23/2007 01:59 PM: > Hi All, > Here 's what I got using dgamma function : > > >> nu<-.2 >> nu*log(nu)-log(gamma(nu))+(nu-1)*log(1)-nu*(1) >

Re: [R] Using R to create pdf's from each file in a directory

Jeff's code works beautifully with a couple changes to my dataset. I must change my data column MB/s to MBs. R seems to think that the "s" is another column if I try to use MB/s. Is there a way that I can make R allow special characters in the column names? The second step to getting this to wo

Re: [R] Random Forest

Rubin, just type "fit" or print(fit). "confusion = TRUE" will not be recognized by randomForest. If you are not seeing the confusion matrix, MMS_ENABLED_HANDSET is not a factor and, thus, a regression fit is being done, not classification as you apparently desire. On 4/22/07, Ruben Feldman <[EMA

[R] Extracing "Interval of Time" in seconds in R

Dear List, I want to let R calculate the time (run-time) it requires to run a self-written simulation function. I tried as follows: it enables me to see the starting and finishing time points. # "sim.result" <- function(nsim, ...){ Starting <- date() ... # calcula

Re: [R] distance method in kmeans

Chandra, you might want to have a look at package "flexclust". Best, Bettina Ranga Chandra Gudivada wrote: > I am trying to cluster some binary data using k-means . As the regular > "kmeans" available from stats package in R does'nt provide the option to > change the distance method. I was won

Re: [R] Extracing "Interval of Time" in seconds in R

?system.time might be what you're looking for. Ted. Mohammad Ehsanul Karim wrote on 04/23/2007 03:53 PM: > Dear List, > > I want to let R calculate the time (run-time) it > requires to run a self-written simulation function. I > tried as follows: it > > enables me to see the starting and finish

Re: [R] Problem with dgamma ?

Tong Wang wrote: > Hi All, > Here 's what I got using dgamma function : > > >> nu<-.2 >> nu*log(nu)-log(gamma(nu))+(nu-1)*log(1)-nu*(1) >> > [1] -2.045951 > > >> dgamma(1,nu,nu,1) >> > [1] 0.0801333 > > >> dgamma(1,nu,nu,0) >> > [1] NaN > Warning message: > NaNs produ

Re: [R] Extracing "Interval of Time" in seconds in R

The following seem to work: begin.time<-Sys.time() begin.times <- format(begin.time, "%a %b %d, %Y at %X") end.time<-Sys.time() end.times <- format(end.time, "%a %b %d, %Y at %X") run.time<-difftime(end.time,begin.time,units="secs") cat(" Start time:", begin.times , "\n", "Finish time:", end.time

Re: [R] Open source community help-desks

On 22-Apr-07 20:51:09, Jeffrey Miller wrote: > I read the reply earlier in which Nima was "naughty-naughty"'d > for calling us a Help Desk. And, I have to admit that I agree. Well, we're not a Help Desk of the kind that puts you on hold, listening to the Free Software Song[1] round and round ... b

Re: [R] Suggestions for statistical computing course

On Fri, 2007-04-20 at 12:13 -0400, Fred Bacon wrote: > > Ideally, it would work like this: > >The free VMware player is installed on each of the lab computers. > >The lab manager uses a licensed copy of VMware Workstation to create > a clean image of a computer. You can use the ope

Re: [R] Estimates at each iteration of optim()?

DEEPANKAR BASU wrote: > I am trying to maximise a complicated loglikelihood function with the "optim" > command. Is there some way to get to know the estiamtes at each iteration? > When I put "control=list(trace=TRUE)" as an option in "optim", I just got the > initial and final values of the log