search for: mentor_

Hi, how can I produce random data which lies around a straight line with angle 45 degree. Similar to this image: http://zoonek2.free.fr/UNIX/48_R/g134.png Cheers -- View this message in context: http://old.nabble.com/Random-data-tp26513822p26513822.html Sent from the R help mailing list archive at Nabble.com.

Hi, I have a further question about matrix manipulation. Imagine the following two matrices: > test [,1] [,2] [,3] [,4] [1,] 1 0 6 4 [2,] 2 5 7 5 [3,] 3 6 8 6 [4,] 4 0 0 0 > matrix(is.element(test,0), ncol=4) [,1] [,2] [,3] [,4] [1,] FALSE TRUE FALSE FALSE [2,] FALSE FALSE FALSE FALSE [3,] FALSE FALSE FALSE FALSE [4,] FALSE

Hi, I have a vector A with (200, 201, 202, 203, 204, ... 210) and a vector B with (201, 204, 209). Now I would like to get the position in vector A matches with the entries in vector B So what I want to have is the following result: [1] 2 5 10 I tried the following: grep(B, A) grep(c(B), A) A <- as.character(A) B <- as.character(B) grep(B, A) grep(c(B), A) and several other

Hi, I have three vectors and I would like to plot them in one window. So R should overlay them in the quartz. I achieved this by plotting the first vector: plot(v1) and add the other two with points(v2) and points(v3). Is there another way to achieve the same result? Cheers -- View this message in context: http://www.nabble.com/Overlay-Plots-tp19918234p19918234.html Sent from the R help mailing

Hi, I would like to plot the rows of a matrix. Is there a better way as doing it in the following way?: plot(matrix[1,], type="l") for (i in 2:dim(matrix)[1]) { lines(matrix[i,], type="l") } Cheers -- View this message in context: http://www.nabble.com/Plot-matrix-tp20438584p20438584.html Sent from the R help mailing list archive at Nabble.com.

Hi, I am not sure which kind of test is applied to the data if you use cor.test(x, y) ? Is it an unpaired t-Test? Regards -- View this message in context: http://www.nabble.com/cor.test%28x%2Cy%29-tp22492993p22492993.html Sent from the R help mailing list archive at Nabble.com.

Hello, consider the following data.frame df and vector v df <- data.frame(group = c("A","B","C","D"), value = c(1,2,3,4)) v <- c(2,3) How can I return a sub data.frame which has only the rows left where value matches v df: group value B 2 C 3 Cheers -- View this message in context:

Hello, can anybody tell me how to produce a plot like the one in http://cran.r-project.org/web/packages/lme4/vignettes/Implementation.pdf on page 13, Figure 6? The data is stored in: library(nlme) data(Oats) Cheers -- View this message in context: http://r.789695.n4.nabble.com/Help-needed-in-reproducing-a-plot-tp4119603p4119603.html Sent from the R help mailing list archive at

Hi, with the "space" parameter it is possible to change the gap / distance between the bars, but is it also possible to change the "space" after each 6th bar? So for example you have bars from 1 to 6 then a large gap and then the next six bars from 7 to 12 Thanks a lot! -- View this message in context:

Hello! If I have a vector vec <- c(FALSE, FALSE, TRUE, FALSE, TRUE, TRUE, FALSE FALSE) I can I create the following order of numbers based on vector vec: 1, 2, 2, 3, 3, 3, 4, 5 Whenever there is a FALSE I increase the number (starting with 1). Whenever there is a TRUE I set the same number as the previous FALSE has been assigned to. I would be happy for any input Cheers, Syrvn -- View

Hello! I have a data.frame which looks like: Name - Value A - 400 A - 300 B - 200 B - 350 C - 500 C - 350 D - 450 D - 600 E - 700 E - 750 F - 630 F - 650 I want to add another column where all A,B should get an index 1, all C,D an index of 2 and all E,F an index of 3 so that the data.frame looks like: ID - Name - Value 1 - A - 400 1 - A - 300 1 - B - 200 1 - B - 350 2 - C - 500 2 - C - 350 2

Hi, I have found the following thread to reorder a data.frame. I would like to do same regarding a matrix: https://stat.ethz.ch/pipermail/r-help/2008-February/154138.html I achieved this with a for loop and cbind but I think using 'is.element' is much more appropriate. Can anyone help? Cheers -- View this message in context:

Hi, how can I do the following in R?: vec <- c("a", "b", "c") ....magic..... print(str) "abc" or even better: "(a,b,c)"? Cheers -- View this message in context: http://www.nabble.com/merge-character-strings-tp20790116p20790116.html Sent from the R help mailing list archive at Nabble.com.

Hi, I would like to plot a matrix which comprises 3 columns. So first column should be the x-axis. Second the y-axis and the third one should be the z-axis. I know that I can plot such data using the scatterplot3d, but I would like to have a surface plot like you can do with wireframe and persp. But both, persp and wireframe, want to have x and y as descending data, at least persp. I am not sure

Hi, First, I do some calculation, then a plot. Add some lines and texts to the plot. Second, do some further calculation, then a plot. Add again some lines and texts to the plot. Third, do some further calculation, then.... Fourth, ..... After a plot is complete (means the plot itself, lines and texts) I would like to click 'enter' to see the next complete plot (again the plot itself,

Hi list, I tried to convert a data.frame into a matrix using data.matrix. Unfortunately my matrix contains missing values (NA) wherefore all columns including NA's were changed into factors. I thought that many people stumbled across that problem already wherefore there must be a simple solution. But it seems there isn't. I tried lapply, replace and other things in combination but still

Hi, let's assume I have the following vector a: 1 5 23 How can I use R to duplicate the elements so that my new vector looks like: 1 1 5 5 23 23 Many thanks, Syrvn -- View this message in context: http://r.789695.n4.nabble.com/Duplicate-elements-of-a-vector-tp3879561p3879561.html Sent from the R help mailing list archive at Nabble.com.

Under MacOS I use the following script to process my latex documents: pdflatex -halt-on-error document.tex bibtex document.aux pdflatex -halt-on-error document.tex pdflatex -halt-on-error document.tex rm *.aux *.bbl *.blg *.log *.nlo *.thm How can I realise this under Windows 7? -- View this message in context:

Hello, with Sys.time() you get the following string: "2011-11-15 16:25:55 GMT" How can I extract the following substrings: year <- 2011 month <- 11 day_time <- 15_16_25_55 Cheers, Syrvn -- View this message in context: http://r.789695.n4.nabble.com/Extract-pattern-from-string-tp4073432p4073432.html Sent from the R help mailing list archive at Nabble.com.

Hello, I am running Windows 7 and R-2.13 in StatET. When I try to create a directory it does not print any errors but if I check outside eclipse if it exists or do a refresh in Eclipse the directory is not been created. The strange thing is that it happens only to some sub-folders... On the other hand when I use the normal windows explorer in one of these sub-folders and create a folder it