similar to: an issue about subsetting a vector

As with a lot of things in R, the behaviour is counterintuitive but (arguably) logical. The key (maybe) is that `a[-x]` does not mean "take all of the elements of a except those indicated by `x`, but rather, "negate x, then take all but the negative elements". In other words, -integer(0) is integer(0) (we multiply *each of the elements of integer(0)* by -1, but

To the R help list, When using a data frame, there is no warning or error message when I refer to a non-existent variable inside the data frame. Example: ##---------------------------------------------- a <- c(1,2,3) b <- c(11,22,33) df <- data.frame(a,b) df ## correct: there is a column in df named 'a' ## the sum is correctly performed sum(df$a==2) ## incorrect: there is

Dear R list members, How to produce barplots anchored to the x-axis (not floating above the x-axis) with a box around? With both following codes, the lower horizontal line of the box is below the y = 0 line: # first code x <- c(1,2,3,4) barplot(x,yaxs='i') box() # second code x <- c(1,2,3,4) op <- par(yaxs='i') barplot(x) box() par(op) The parameter yaxs='i'

To the R-help list, In the documentation of the prop.trend.test function in the stats package, no bibliography has been provided which would allow one to find out the theoretical basis of that function and/or details of its implementation. May I suggest that some bibliography be included, as it generally happens with other statistical functions. I currently use R 2.8.0 running on Windows XP.

Dear R-list members, I am trying to put a legend just outside the plotting area of a graph. 1. Is there some way to plot symbols on the figure margin, in the same way as function "mtext" can write on the margin? 2. Is there some way to use the "legend" function (or some equivalent function) to plot a legend on the figure margin? 3. Any other way to plot either symbols or a

Dear R users, The parameters xaxs and yaxs (function par, package graphics) seem not to work with the function hist (package graphics), even when the parameters xlim and ylim are defined. Is there any way to make yaxs="i" and xaxs="i" work properly with the function hist, mainly to produce histograms that "touch" the horizontal axis? The R documentation and the R

Dear R-list members, I have just downloaded R version 2.11.0. Then I installed package gdata. At the end of the installation, a warning message said that package gtools could not be found. Package gdata was, after the installation, included in the "Package Index" in the help files. Messages during installation (which was made through the menu Packages / Instal package(s), choosing the

Dear R users, I need to save a graph in jpeg format. After plotting the graph, when the graphics window is active, in the File menu, the Save as / Jpeg / 100% quality correctly saves the graph in jpeg format. But I would like to know, how could I control the resolution (in dpi) of the saved jpeg file? I need to produce a jpeg at 1200 dpi. I have tried also the jpeg function in the package

Dear R-list members, I would like to pose a question about the use and results of the glm() function for logistic regression calculations. The question is based on an example provided on p. 229 in P. Dalgaard, Introductory Statistics with R, 2nd. edition, Springer, 2008. By means of this example, I was trying to practice the different ways of entering data in glm(). In his book, Dalgaard

Hi, I have a CSV file where each row has at least 20 columns and some rows have up to 30 columns of data. When I use the command, Pathways<-read.table('MetaCycSample3.csv',sep=',',header=FALSE,quote='"') anything past the 21st column gets kicked down to a new row. How can I fix this? Thanks, -Nina

Please excuse me for asking such basic questions: Here is my code > y=c(1.21,0.51,0.14,1.62,-0.8,0.72,-1.71,0.84,0.02,-0.12) > ybar=mean(y) > ll=length(y); > ybarv=rep(ybar,ll) > x=1:ll > plot(x,ybarv,pch=1) > segments(x[1],ybar,x[ll],ybar) What I get is a collection of small circles, with a segment "on top" of the circles, which is almost what I want. But I

A general question- and excuse me if you find it irrelevant Are you tracking how many people finally download a specific R version by counting the number of downloads through log/ analytics software like GA etc? If so- can we see some numbers Ajay Websites- http://decisionstats.com http://dudeofdata.com Linkedin- www.linkedin.com/in/ajayohri

Dear R-list members, This is in fact a question about statistics, not directly about the R software. The coin package, for conditional inference through permutation methods, has as it main function the function independence_test. One of its parameters is teststat, about which the package documentation says: teststat: "a character, the type of test statistic to be applied: either a

Dear R-list members, Once a gam (package gam) model has been fitted with family=poisson, is there some R function that could extract the diagonal elements of the smoother matrix S, to be used in a cross-validation for the selection of the best smoothing parameter, following equation 3.19 on page 48 of the book T.J. Hastie and R.J. Tibshirani, Generalized Additive Models, Chapman and Hall/CRC,

Dear R-list members, I have a data file with thousands of lines (cases), where each line contains the values of several variables. I would like to separate these lines in small groups, with each group followed by a blank line, to ease the visual inspection of the data in some situations. I am writing the output files with function write.fwf in library gdata, for correct column alignment. Below

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On 5/2/07, r-help-request@stat.math.ethz.ch < r-help-request@stat.math.ethz.ch> wrote: > > Send R-help mailing list submissions to > r-help@stat.math.ethz.ch > > To subscribe or unsubscribe via the World Wide Web, visit > https://stat.ethz.ch/mailman/listinfo/r-help > or, via email, send a message with subject or body 'help' to >

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"The R Inferno" is now on the Burns Statistics website at http://www.burns-stat.com/pages/Tutor/R_inferno.pdf Abstract: If you are using R and you think you're in hell, this is a map for you. Also, I've expanded the outline concerning R on the Burns Statistics 'Links' page. Suggestions (off-list) for additional items are encouraged. Patrick Burns patrick at

Hello here. I'm struggling to understand R's subsetting behavior in couple of edge cases - subsetting row in a single column matrix and subsetting column in a single row matrix. I've read R's docs several times and haven't found answer. Consider following example: a = matrix(1:2, nrow = 2, dimnames = list(c("row1", "row2"), c("col1"))) a[1, ] # 1