search for: sbry

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2023 Jan 28
1
lines through points in lattice legend
On Sat, Jan 28, 2023 at 2:49 PM Kenneth Knoblauch <ken.knoblauch at inserm.fr> wrote: > > Hi, > > I'm struggling to find if there is a simple way to make the lines and points overlap in a legend for a lattice plot using auto.key. Here is a toy example of what doesn't work (for me) as the lines and points are adjacent rather than overlapping: > > library(lattice)
2013 Mar 18
4
plotting CIE chromaticity diagram?
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 [[alternative HTML version deleted]]
2023 Jan 28
2
lines through points in lattice legend
Hi, I'm struggling to find if there is a simple way to make the lines and points overlap in a legend for a lattice plot using auto.key. ?Here is a toy example of what doesn't work (for me) as the lines and points are adjacent rather than overlapping: library(lattice) d <- data.frame(x = 1:2, y = 1:4, f = factor(letters[1:2])) xyplot(y ~ x, d, groups = f, type = "b",? pch =
2009 Aug 20
0
Sweave truncation
Peter Thank you for the information. I accidentally deleted Ken's post without having read it. Ken' s thought is great but as you said awful to implement I thought that capture.output would come in handy some time when I first saw it on an unrelated reply. Just thought :- the latex listings package may have alternatives If I remember correctly it has wrapping and other goodies but I
2013 Jun 12
2
grDevices::convertColor XYZ space is it really xyY?
grDevices::convertColor has arguments 'from' and 'to' which can take on value 'XYZ'. Can someone confirm that 'XYZ' is the same as the CIE chromaticity coordinates that are also sometimes refered to as 'xyY' in the literature? Or are these the CIE tristimulus values? It looks to me like the first case is true, but I would appreciate hearing from one of
2010 Mar 06
0
thin grid lines, again (FAQ 7.36), a proposal
Hi, I'm raising the issue, again, of those pesky thin lines that show up with a pdf graphics device, otherwise known as FAQ 7.36. I have read the FAQ and understand that I can eliminate them by adjusting the anti-aliasing option for viewing them on the screen, but this doesn't necessarily eliminate them for a print device or for transferring them into a powerpoint or similar type of
2008 Oct 16
1
packages in Depends field and NAMESPACES
Must packages in the Depends field of the DESCRIPTION file have NAMESPACES? I haven't seen this explicitly indicated anywhere. I am writing a small package and find that when I add the abind package to the list of the Depends field, I get an error in R CMD check of the build. * checking package name space information ... OK * checking package dependencies ... ERROR Packages required but not
2009 Dec 08
4
lower.tail option in pnorm
Hi, I would have thought that these two constructions would produce the same result but they do not. Resp <- rbinom(10, 1, 0.5) Stim <- rep(0:1, 5) mm <- model.matrix(~ Stim) Xb <- mm %*% c(0, 1) ifelse(Resp, log(pnorm(Xb)), log(1 - pnorm(Xb))) pnorm(as.vector(Xb), lower.tail = Resp, log.p = TRUE) > ifelse(Resp, log(pnorm(Xb)), log(1 - pnorm(Xb))) [1] -0.6931472 -1.8410216
2008 Sep 09
1
puzzle about contrasts
Hi, I'm trying to redefine the contrasts for a linear model. With a 2 level factor, x, with levels A and B, a two level factor outputs A and B - A from an lm fit, say lm(y ~ x). I would like to set the contrasts so that the coefficients output are -0.5 (A + B) and B - A, but I can't get the sign correct for the first coefficient (Intercept). Here is a toy example, set.seed(12161952) y
2010 Feb 11
1
Sweave, lty = 3 line incorect in pdf output
I'm having a problem with dotted lines (lty = 3) in the pdf output in documents generated with Sweave. In the displayed pdf, the dotted line does not show up and in the printed output, it is there but does not seem to respect the lwd argument, for example, it is very faint despite using lwd = 3. The dotted line is correct in a quartz window and if I save the Quartz window to a pdf and
2012 Mar 10
1
Generating abnormal returns in R
..."MLSNP.PA" , "IBE.MC" , "EURS.PA" , "AH.AS" , "VIV.PA" , "TIT.MI" , "VOLV-B.ST" , "ABI.BR" , "LHA.DE" , "OML.L" , "CNA.L" , "CON.DE" , "PHG" , "AZN.L" , "SBRY.L" , "BA.L" , "BT-A.L" , "AF.PA" , "430021.VI" , "SL.L" , "ERIC-A.ST" , "CDI.PA" , "AAL.L" , "ALO.PA" , "DELB.BR" , "HOT.BE" , "GAS.MC" , "SU.PA" , "OR.PA&quot...
2013 Oct 21
3
speeding up "sum of squared differences" calculation
All, 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 quicker. Please see the code below for a simple example. If anyone can point out a faster way I would appreciate it greatly. Thanks, Roger
2024 Jul 31
0
cloning a graphics window
I often want to get a graphics window that is the same size as one that I resized by hand (because it was quicker than setting the width and height directly in dev.new) and have sometimes resorted to using a ruler on my screen or just resize matching. I came up with the following function that does what I want dev.clone <- function(){ if(is.null(dev.list())) stop("No active graphics
2009 Sep 09
0
new package MLCM: Maximum Likelihood Conjoint Measurement
This is to announce a new package MLCM on CRAN. The package provides functions for estimating perceptual scales by maximum likelihood from data collected in a conjoint measurement experiment. Data for conjoint measurement are typically collected using a psychophysical procedure. The stimuli vary along 2 or more dimensions. The observer views pairs of stimuli and judges which stimulus of each pair
2008 Jun 23
2
grouping values
I tried aggregate, apply etc, but can't get the right result. For example, m <- cbind(c(LETTERS[1:5]), c("aa", "bb", "cc", "aa", "cc")) [,1] [,2][1,] "A" "aa"[2,] "B" "bb"[3,] "C" "cc"[4,] "D" "aa"[5,] "E" "cc" how to obtain
2008 Oct 23
1
Fw: It 's correct to do contrasts for a GLM?
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 identify that treatments are different. I know that the contrasts are used in ANOVA, it 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
2010 Apr 01
1
Stack with factors
Hi R users: I found that I cannot stack() a data.frame with factors. db1<-data.frame(replicate(6,factor(sample(c("A","B"),6,replace=TRUE)))) str(db1) db2<-stack(db1) db2 "db2" does not have any row. How can I stack them by the variables X1,X2,...,X6? Thank you for your help. Kenneth
2011 Jan 06
1
Deselect one of the array's matrix
Hello everyone and season's greetings. I have an array that looks like that R<-c(1,2,3,4,5,6). Is it possible to select all the elements but except one? For example to not select the third element and get back (1,2,4,5,6)? How can I do that? I would like to thank you in advance for your help Best Regards Alex [[alternative HTML version deleted]]
2009 Feb 23
0
length 1 offset in glm
Hi, I'm trying to use an offset with glm. According to the glm man page offset ... This should be NULL or a numeric vector of length either one or equal to the number of cases. ... but with the following example, I get an error if the offset is of length 1 c1 <- structure(list(Contr = c(0.028, 0.043, 0.064, 0.097, 0.146, 0.219 + ), Correct = c(34L, 57L, 94L, 152L, 160L, 160L),
2009 Sep 09
0
new package MLCM: Maximum Likelihood Conjoint Measurement
This is to announce a new package MLCM on CRAN. The package provides functions for estimating perceptual scales by maximum likelihood from data collected in a conjoint measurement experiment. Data for conjoint measurement are typically collected using a psychophysical procedure. The stimuli vary along 2 or more dimensions. The observer views pairs of stimuli and judges which stimulus of each pair