[R] Question about arima.sim()

2009-04-04 Thread Yang Yang
Hi, I tried to simulate an ARIMA model by using arima.sim(), say arima.sim(n=100,list(order=c(1,0,1),ar=0.6,ma=0.9,sd=1), but the acf and pacf of simulated data using acf() and pacf() are so much different from the theoritcal acf and pacf. For instance, in my case, ar=0.6 and ma=0.9, so the ac

[R] predicting values into the future

2009-04-04 Thread Felipe Carrillo
Hi: I have usually used the GROWTH() excel function to do this but now want to see if I can do this with R. I want to predict values into the future, possibly with the predict.arima Function. I have the following weekly fish weight averages: weight <- c("2.1","2.4","2.8","3.6","4.1","5.2","6.3

Re: [R] threshold distribution

2009-04-04 Thread jim holtman
Here is what I get from using 'fitdistr' in R to fit to a lognormal. The resulting density plot from the distribution seems to be a reason match to the data. > x <- scan() 1: 0.80010 0.72299 0.69893 0.99597 0.89200 0.69312 0.73613 1.13559 9: 0.85009 0.85804 0.73324 1.04826 0.84002 14: 1.76330 0.71

Re: [R] Eclipse and StatET Howto (also added Subversion, Rtools)

2009-04-04 Thread Berwin A Turlach
G'day Dirk, On Sat, 4 Apr 2009 20:27:22 -0500 Dirk Eddelbuettel wrote: > On 4 April 2009 at 14:37, Ken-JP wrote: > > Yes, I have x11-common installed, and dpkg -S /etc/X11/rgb.txt > > shows "not found" for me. This is on Ubuntu 8.10 amd64. > > Same 8.10 for both amd64 and i386 where I checked

[R] multiple imputation

2009-04-04 Thread Yen
Hi, I'm relatively new to R and it'll be great if someone can help me with what I'm doing here. I am trying to do multiple imputation on my dataset, but I'm not quite sure which function to use as my dataset contains dichotomous variables. Here's an outline of what i've done so far, and i'm not

Re: [R] Help using smooth.spline with zoo object

2009-04-04 Thread roger koenker
For equally spaced observations this is quite simple and available in various packages but I like Gabor Grothendieck's version (which didn't come up immediately in my Rseek search: hpfilter <- function(y,lambda=1600) eye <- diag(length(y)) solve(eye+lambda*crossprod(diff(eye,d=2)),y)} ur

[R] threshold distribution

2009-04-04 Thread Abelian
Dear ALL I have a list of data below 0.80010 0.72299 0.69893 0.99597 0.89200 0.69312 0.73613 1.13559 0.85009 0.85804 0.73324 1.04826 0.84002 1.76330 0.71980 0.89416 0.89450 0.98670 0.83571 0.73833 0.66549 0.93641 0.80418 0.95285 0.76876 0.82588 1.09394 1.00195 1.14976 0.80008 1.11947 1.09484 0.8149

Re: [R] Eclipse and StatET Howto (also added Subversion, Rtools)

2009-04-04 Thread Dirk Eddelbuettel
Hi again, On 4 April 2009 at 14:37, Ken-JP wrote: | Yes, I have x11-common installed, and dpkg -S /etc/X11/rgb.txt shows "not | found" for me. | This is on Ubuntu 8.10 amd64. Same 8.10 for both amd64 and i386 where I checked -- both have the file. It could be a leftover from an earlier install

Re: [R] Problem with sample()

2009-04-04 Thread Duncan Murdoch
On 04/04/2009 6:34 PM, mackas21 wrote: Hi, I'm having a problem using sample() within a function. Basically I get an error reading: Error in sample(v, 1, prob = h) : non-positive probability Can anyone advise me as to the possible origin of this error? Presumably h doesn't contain a vector o

Re: [R] comparing columns in a dataframe

2009-04-04 Thread markleeds
Hi: you've got to create a setdiff in both directions in order to get the lone ones in each column because setdiff is not commutative meaning that setdiff(a,b) does not equal setdiff(b,a). once you do that, then ( setdiff1 + setdiff2 - intersect ) should equal the union. if it

[R] Problem with sample()

2009-04-04 Thread mackas21
Hi, I'm having a problem using sample() within a function. Basically I get an error reading: Error in sample(v, 1, prob = h) : non-positive probability Can anyone advise me as to the possible origin of this error? Here is my code #Discretised Gillespie algorithm function (From SMfSB, D.J. Wilk

[R] comparing columns in a dataframe

2009-04-04 Thread Bob Green
hello, I am hoping for some advice regarding comparing variables from 3 versions of a spreadsheet which have been combined into a single dataframe. The aim is to identify which rows have been changed. The dataframe contains 177 rows of data (each cell contains text). 'intersect' produced a f

[R] help with formula and data= argument

2009-04-04 Thread Derek Ogle
Sorry for posting this twice, but I still have not solved this problem and am hoping for some assistance. I am attempting to write a function that is flexible enough to respond to the user providing a formula (with a data= argument) or not (similar to plot(x,y) versus plot(y~x,data=data)). I h

Re: [R] Help with "by"

2009-04-04 Thread David Winsemius
On Apr 4, 2009, at 3:42 PM, AllenL wrote: Searched for "by" in forums and no hits, should be simple problem. The help page for by must surely have have *some* information? This is my line: bio.mean<-by(Data,Plot, function(x) mean(AbvBioAnnProd)) I want to calculate the mean of "AbvBio

Re: [R] axis colours

2009-04-04 Thread Duncan Murdoch
On 04/04/2009 5:13 PM, Umesh Srinivasan wrote: Hi, Is there a way to use par to change the colours of the axes lines (not the labels)? I've done this: par(bg = "black") plot(x, y, col = "yellow", pch = 16) but I have to use axes = F within the plot command, and then use axis (1, col = "yello

Re: [R] Extracting a function from a R package

2009-04-04 Thread Uwe Ligges
WilDsc0p wrote: Dear List, I typed page(survival:::print.coxph, "print" ) and I got the respective codes. page(MASS::lda, "print") gives me ### function (x, ...) UseMethod("lda") ### Is there any way I can get/extract the lda fu

Re: [R] for loop for extracting linear model info

2009-04-04 Thread Uwe Ligges
Melissa2k9 wrote: Uwe Ligges-3 wrote: Melissa2k9 wrote: Hi, I have written a for loop as such: model<-lm(Normalised~Frame,data=All,subset=((Subject==1)&(Filmclip=="Strand"))) summary(model) ### #To extract just the Adjusted R squared

Re: [R] axis colours

2009-04-04 Thread Uwe Ligges
Umesh Srinivasan wrote: Hi, Is there a way to use par to change the colours of the axes lines (not the labels)? I've done this: par(bg = "black") plot(x, y, col = "yellow", pch = 16) but I have to use axes = F within the plot command, and then use axis (1, col = "yellow") axis (2, col = "y

Re: [R] Help with "by"

2009-04-04 Thread Uwe Ligges
AllenL wrote: Searched for "by" in forums and no hits, should be simple problem. This is my line: bio.mean<-by(Data,Plot, function(x) mean(AbvBioAnnProd)) I want to calculate the mean of "AbvBioAnnProd" in each Plot. What am I doing wrong? What is AbvBioAnnProd? I only see that you pass D

Re: [R] Eclipse and StatET Howto (also added Subversion, Rtools)

2009-04-04 Thread Ken-JP
Yes, I have x11-common installed, and dpkg -S /etc/X11/rgb.txt shows "not found" for me. This is on Ubuntu 8.10 amd64. http://ubuntuforums.org/archive/index.php/t-59024.html Thanks for the detailed explanation on how R decides on where to install packages! I think I ran into problems when I ha

[R] Extracting a function from a R package

2009-04-04 Thread WilDsc0p
Dear List, I typed > page(survival:::print.coxph, "print" ) and I got the respective codes. > page(MASS::lda, "print") gives me ### function (x, ...) UseMethod("lda") ### Is there any way I can get/extract the lda function from MASS? T

Re: [R] Eclipse and StatET Howto (also added Subversion, Rtools)

2009-04-04 Thread Dirk Eddelbuettel
On 4 April 2009 at 13:59, Ken-JP wrote: | An update: after several days of struggling, I got StatET to work on Ubuntu | 8.10 amd64, R 2.8.1. | | Here are some tips: | 1. You may run into an X11 issue with tktcl in R as someone decided to omit | /etc/X11/rgb.txt If you get weird issues with your

[R] axis colours

2009-04-04 Thread Umesh Srinivasan
Hi, Is there a way to use par to change the colours of the axes lines (not the labels)? I've done this: par(bg = "black") plot(x, y, col = "yellow", pch = 16) but I have to use axes = F within the plot command, and then use axis (1, col = "yellow") axis (2, col = "yellow") and so on for axes

Re: [R] Eclipse and StatET Howto (also added Subversion, Rtools)

2009-04-04 Thread Ken-JP
An update: after several days of struggling, I got StatET to work on Ubuntu 8.10 amd64, R 2.8.1. Here are some tips: 1. You may run into an X11 issue with tktcl in R as someone decided to omit /etc/X11/rgb.txt If you get weird issues with your R installation with window colors like "red" or "bla

Re: [R] [R-sig-Geo] error in trmesh (alphahull package)

2009-04-04 Thread Murray Richardson
Ahhh - so simple, my mistake. Thanks! Murray José Manuel Blanco Moreno wrote: Hello, The problem is that your first three points CANNOT be collinear. This is a feature of trmesh in tripack. So: either you "unsort" your data (keeping the indices you can sort them again) or alter (e.g. jitter)

[R] Help with "by"

2009-04-04 Thread AllenL
Searched for "by" in forums and no hits, should be simple problem. This is my line: >bio.mean<-by(Data,Plot, function(x) mean(AbvBioAnnProd)) I want to calculate the mean of "AbvBioAnnProd" in each Plot. What am I doing wrong? Thanks in advance, -AL -- View this message in context: http://ww

Re: [R] Help using smooth.spline with zoo object

2009-04-04 Thread Gabor Grothendieck
Try this: library(zoo) library(lattice) z <- as.zoo(EuStockMarkets) xyplot(z) # original xyplot(z, type = "smooth") # smooth In zoo see ?xyplot.zoo and in lattice see ?panel.xyplot On Sat, Apr 4, 2009 at 3:19 PM, Rob Denniker wrote: > Can someone please show me how to smooth time series data t

[R] Help using smooth.spline with zoo object

2009-04-04 Thread Rob Denniker
Can someone please show me how to smooth time series data that I have in the form of a zoo object? I have a monthly economies series and all I really need is to see a less jagged line when I plot it. If I do something like s <- smooth.spline(d.zoo$Y, spar = 0.2) plot(predict(s,index(d.zoo)),

Re: [R] data.frame, converting row data to columns

2009-04-04 Thread hadley wickham
On Sat, Apr 4, 2009 at 12:28 PM, jim holtman wrote: > Does this do what you want: > >> x <- read.table(textConnection("name         wrist nLevel            emot > + 1                    4094          3.34                    1   frustrated > + 2                    4094          3.94                

Re: [R] Basic doubts on the use of several script files in R batch mode

2009-04-04 Thread Patrick Burns
An alternative to Jim's route might be to create functions rather than relying entirely on scripts. Patrick Burns patr...@burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of "The R Inferno" and "A Guide for the Unwilling S User") jim holtman wrote: Create a "master" file that

Re: [R] data.frame, converting row data to columns

2009-04-04 Thread jim holtman
Does this do what you want: > x <- read.table(textConnection("name wrist nLevelemot + 14094 3.341 frustrated + 24094 3.941 frustrated + 34094NA

Re: [R] data.frame, converting row data to columns

2009-04-04 Thread hadley wickham
On Sat, Apr 4, 2009 at 12:09 PM, ds wrote: > > I have a data frame something like: >                      name         wrist > nLevel            emot > 1                    4094          3.34                    1 > frustrated > 2                    4094          3.94                    1 > frustra

[R] data.frame, converting row data to columns

2009-04-04 Thread ds
I have a data frame something like: name wrist nLevelemot 14094 3.341 frustrated 24094 3.941 frustrated 3409

Re: [R] Basic doubts on the use of several script files in R batch mode

2009-04-04 Thread jim holtman
Create a "master" file that 'source's the required *.R files and then does any of the pre/post processing that you want. On Fri, Apr 3, 2009 at 4:30 PM, wrote: > I already searched for information regarding the batch file operations > within R. But I could not locate the information I need. > >

Re: [R] temporarily modify par values?

2009-04-04 Thread Jim Ottaway
> Gabor Grothendieck writes: > Here is a minor variation: > par <- function( ... ) structure( graphics::par( ... ), class = "par" ) > with.par <- function( data, expr, ... ) { >on.exit(par(old.par, no.readonly = TRUE)) >old.par <- data >invisible(expr) > } > which returns expr in

[R] Nice error from misuse of <- and <<-

2009-04-04 Thread Duncan Murdoch
Here's a simplified version of some code I wrote for a demonstration. I wanted a function that was attached to a tck/tk button to redo a simulation on request; then some plots were changed, etc. But it didn't work on the first attempt: > x <- NULL > xmean <- NULL > > resim <- function() { +

Re: [R] Multiple use of par()

2009-04-04 Thread Dieter Menne
Hesen Peng wrote: > > > Thanks a lot for reminding me of this. The original code is too > complicated and stems from several other objects. So I guess this > simplified code may help: > > a <- rnorm(100) > class(a) <- "foo" > > plot.foo <- function(data){ > ## opar<-par() > par(mfcol=c(1,

Re: [R] Multiple use of par()

2009-04-04 Thread jim holtman
To get what you want with the basic graphics, you probably want something like this (tuned to you data): a <- rnorm(100) class(a) <- "foo" plot.foo <- function(data){ ## opar<-par() #-- par(mfcol=c(1,2)) hist(data) boxplot(data) ## par(mfcol=c(1,1)) } par(mfcol=c(4,2)) plot(a) plot(a) plot

Re: [R] Multiple use of par()

2009-04-04 Thread Hesen Peng
Hi, Thanks a lot for reminding me of this. The original code is too complicated and stems from several other objects. So I guess this simplified code may help: a <- rnorm(100) class(a) <- "foo" plot.foo <- function(data){ ## opar<-par() par(mfcol=c(1,2)) hist(data) boxplot(data) ## par(m

Re: [R] temporarily modify par values?

2009-04-04 Thread Gabor Grothendieck
Here is a minor variation: par <- function( ... ) structure( graphics::par( ... ), class = "par" ) with.par <- function( data, expr, ... ) { on.exit(par(old.par, no.readonly = TRUE)) old.par <- data invisible(expr) } which returns expr invisibly so that this works: bp <- with(par(mar =

Re: [R] temporarily modify par values?

2009-04-04 Thread Jim Ottaway
> Romain Francois writes: > "with" is generic, so you could do something like that: >> par <- function( ... ) structure( graphics::par( ... ), class = "par" ) >> with.par <- function( data, expr, ... ){ > +old.par <- data > +expr > +invisible( par( old.par ) ) > + } >> with( par(

Re: [R] Constrined dependent optimization.

2009-04-04 Thread Hans W. Borchers
Just in case you are still interested in theoretical aspects: In combinatorial optimization, the problem you describe is known as the Quadratic (Sum) Assignment Problem (QAP or QSAP) and is well known to arise in facility and warehouse layouts. The task itself is considered hard, comparable to th

Re: [R] In plot.zoo the screens and ylim arguments seem incompatible

2009-04-04 Thread Gabor Grothendieck
Are the different systems using the same version of the zoo package? On Fri, Apr 3, 2009 at 2:49 PM, Scott Tennican wrote: > > Hi Gabor, > > It seems that the problem depends on operating system. > I have recently switched from using R on Windows Vista to using it on Ubuntu > Linux. > I had alrea

Re: [R] temporarily modify par values?

2009-04-04 Thread Jim Ottaway
> Romain Francois writes: > Jim Ottaway wrote: >> Is there some sort of 'with.par' function that temporarily changes par >> parameters and then re-sets them so that instead of doing things such as > "with" is generic, so you could do something like that: >> par <- function( ... ) structure(

Re: [R] [R-sig-Geo] error in trmesh (alphahull package)

2009-04-04 Thread José Manuel Blanco Moreno
Hello, The problem is that your first three points CANNOT be collinear. This is a feature of trmesh in tripack. So: either you "unsort" your data (keeping the indices you can sort them again) or alter (e.g. jitter) the coordinates very slightly. Either solution will do the work. Cheers, José M

Re: [R] all subsets for glm

2009-04-04 Thread Harald von Waldow
> Of all the dangerous ways of doing this and getting confusing results, > gl1ce in lasso2 should be the least risky. Thanks Dieter. In case an exhaustive search (all subsets) remains infeasible, I'll include a shrinkage method for sure. Looks like glmpath could be useful here. Best, Harald ___

Re: [R] temporarily modify par values?

2009-04-04 Thread Romain Francois
Jim Ottaway wrote: Is there some sort of 'with.par' function that temporarily changes par parameters and then re-sets them so that instead of doing things such as opar <- par(mar=c(4.1,4.1,4.1,8),...) par(opar) you can do something like with.par(mar=c(4.1,4.1,4.1,8),..., ) where all

[R] temporarily modify par values?

2009-04-04 Thread Jim Ottaway
Is there some sort of 'with.par' function that temporarily changes par parameters and then re-sets them so that instead of doing things such as opar <- par(mar=c(4.1,4.1,4.1,8),...) par(opar) you can do something like with.par(mar=c(4.1,4.1,4.1,8),..., ) where all but the last argument

Re: [R] how to do this "the R way"

2009-04-04 Thread Patrick Burns
You can find a discussion of subscripting in pretty much any document on R. Patrick Burns patr...@burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of "The R Inferno" and "A Guide for the Unwilling S User") onyourmark wrote: Yes, That is it! Can I just make sure I understand i

Re: [R] how to do this "the R way"

2009-04-04 Thread onyourmark
Yes, That is it! Can I just make sure I understand it? the second entry in perm[ , ] indicates the column, but you are putting in a vector. This will therefore give a vector?? (any suggestions under what topic I can read about this?) So it is like a loop and each time it is filling in the next ent

[R] R Training courses

2009-04-04 Thread Oliver Kimberlin
All, There are still places available on the following courses. For more detailed information and a registration form please contact train...@mango-solutions.com, or visit our website at www.mango-solutions.com. The R Language Dates: 21st t

Re: [R] how to do this "the R way"

2009-04-04 Thread onyourmark
WOW. Is it really that compact? I will give it a try. Amazing if true. Thanks. Patrick Burns wrote: > > You need a comma (,) not a dot (.) in your > subscripting of the matrix. If I get the question > correctly, you want: > > newTS2 <- perm[100, TS2] > > > Patrick Burns > patr...@burns-stat.

Re: [R] Planned contrast on repeated measures

2009-04-04 Thread Dieter Menne
Bugzilla from rmh3...@gmail.com wrote: > > I have an anova model that looks like this: > > aov(log(Y)~X+Error(Participant/X)) > > Is there a way to do a planned contrast on a repeated measures > model... something with an error term? I get an error when I do this: > contrasts(X)=cbind(-3,-1,1

Re: [R] Multiple use of par()

2009-04-04 Thread Dieter Menne
Hesen Peng-2 wrote: > > I created a plot function which used par(mfcol=c(2,1)) so that I could > have two plots together using just one command. > > For exampe: > > plot.foo <- function(data){ > par(mfcol=c(2,1)) > hist(data) > plot(data) > } > > Later I wanted to show 4 of these foo objec

Re: [R] Basic doubts on the use of several script files in R batch mode

2009-04-04 Thread Emmanuel Charpentier
Le vendredi 03 avril 2009 à 22:30 +0200, mcnda...@mncn.csic.es a écrit : > I already searched for information regarding the batch file operations > within R. But I could not locate the information I need. > > Basically I have a doubt regarding the procedures on the batch use of > several scrip

Re: [R] how to do this "the R way"

2009-04-04 Thread Patrick Burns
You need a comma (,) not a dot (.) in your subscripting of the matrix. If I get the question correctly, you want: newTS2 <- perm[100, TS2] Patrick Burns patr...@burns-stat.com +44 (0)20 8525 0696 http://www.burns-stat.com (home of "The R Inferno" and "A Guide for the Unwilling S User") onyour

Re: [R] how to do this "the R way"

2009-04-04 Thread onyourmark
Hi. newTS2 =(perm[100.TS2[1]]. perm[100.TS2[2]]. perm[100.TS2[3]]. ... , perm[100.TS2[2000]]) newTS2 is supposed to be a vector of 2000 values. The first value is supposed come from a particular element of the matrix called 'perm'. I thought that perm[100.TS2[1]] would be valid code in R to r

Re: [R] Fit unequal variance model in R

2009-04-04 Thread Feng Jingyu
Yes, I am considering I am a lucky man because you answered my question. Have a great weekend! Dieter Menne wrote: > > > Feng Jingyu wrote: >> >> Hi For my purpose, I need to match variance estimates for each group from >> R and SAS. They do match now. >> > Consider yourself a lucky man! >

[R] Discriminant analysis - posterior prob

2009-04-04 Thread MarcioRibeiro
Hi listers, I have a statistical question corcerning the posteriori probability of a discriminant analysis. I am calculating the probabilities under R using the formula. posteriori_j=exp(q_j(y))/sum(q_j(y)) qj(y) is my quadratic discriminant function for the case where my covariance matrix are pro

[R] Basic doubts on the use of several script files in R batch mode

2009-04-04 Thread mcnda839
I already searched for information regarding the batch file operations within R. But I could not locate the information I need. Basically I have a doubt regarding the procedures on the batch use of several script files (*.R). How can I do this? How can I define the order of files? My intent

Re: [R] Fit unequal variance model in R

2009-04-04 Thread Feng Jingyu
Hi For my purpose, I need to match variance estimates for each group from R and SAS. They do match now. I notice there are still some difference between those two. For example the standard errors of coeffieicints are different, but I don't care those. Dieter Menne wrote: > > > > To conserve y

Re: [R] In plot.zoo the screens and ylim arguments seem incompatible

2009-04-04 Thread Scott Tennican
Hi Gabor, It seems that the problem depends on operating system. I have recently switched from using R on Windows Vista to using it on Ubuntu Linux. I had already tried your two suggestions on Ubuntu and they produce the same error: Error in ylim[[idx]] : subscript out of bounds According to

Re: [R] Fit unequal variance model in R

2009-04-04 Thread Feng Jingyu
I used gls and it still does not provide me different estimates of variance for each treatment group. Did I do anything wrong? lm3<-gls(GSI~treatment,data=z,weights=varIdent(form=~treatment),method="ML") summary(lm3) Generalized least squares fit by maximum likelihood Model: GSI ~ treatment

Re: [R] Fit unequal variance model in R

2009-04-04 Thread Feng Jingyu
Thanks a lot. The problem is solved. It took me a while to understand the output from the R. With little calculation, I am able to match results from R to SAS. Dieter Menne wrote: > > > Feng Jingyu wrote: >> >> I used gls and it still does not provide me different estimates of >> variance for

Re: [R] Convert factor to "double"?

2009-04-04 Thread p . silva
> > > Anyway, I would like to Fourier-transform one column. So I say: > >> fft(test1$vP) > > Error in levels(x)[x] : invalid subscript type 'complex' > >> test1$vP[1:10] > > [1] 110 108 116 118 114 120 117 111 95 118 > > 166 Levels: - 0 1 10 100 101 102 103 104 105 106 107 108 109 11 110 111 >

Re: [R] for loop for extracting linear model info

2009-04-04 Thread Melissa2k9
Uwe Ligges-3 wrote: > > > > Melissa2k9 wrote: >> Hi, >> >> I have written a for loop as such: >> >> model<-lm(Normalised~Frame,data=All,subset=((Subject==1)&(Filmclip=="Strand"))) >> summary(model) >> >> ### >> #To extract just the Adjusted R squared >>

[R] Bivariate meta-analysis in R

2009-04-04 Thread Jorgensen, Andrea
Dear All I wish to undertake a bivariate meta-analysis in R - does anyone know of any readily available functions to do this ? Many thanks Andrea [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/

Re: [R] [OT ?] rant (was : Re: Conversions From standard to metricunits)

2009-04-04 Thread Emmanuel Charpentier
Le vendredi 03 avril 2009 à 20:01 -0400, Murray Cooper a écrit : > For science yes. For pleasure I'll still take a pint instead of 570ml! Yes, but do you realize that you'll have to pee in fl. oz ? Aie ... Emmanuel Charpentier ___

[R] (SOLVED) Re: [tcl] unknown color name "red" errors

2009-04-04 Thread Ken-JP
On the boards for Ubuntu 8.10 64-bit, there were comments along the lines that: /etc/X11/rgb.txt was missing. However, even after I replace this file, and logged back out in, this problem went away. It's shocking that a file as old/basic as /etc/X11/rgb.txt can be removed - I'm sure a lot of