similar to: boxplots

Dear R community, I am creating large graphs with hundreds of thousands of datapoints. My usual way for output was pdf, but now I am getting file sizes of >30Mb that do not open well (or at all) in Adobe. Is there a way to reduce the resolution or get rid of overlaying datapoints? Any other idea is also warmly welcome! Thank you and wishing you a good day! Georg. **********************

Dear R user group, I wish to plot small pie-charts to specific coordinates in a e.g. scatter-plot: E.g.: > plot(rnorm(100),rnorm(100)) > points(1,1,col="red",cex=4) -> I wish to put pie(c(2,3)) at the position of the red circle... How can I do this efficiently? Thanking you and wishing you a wonderful Sunday! Georg. ************************** Georg Ehret Johns Hopkins

Dear Miss R, I wish to plot three datasets on completely different scales into one single plot. Until now I use a complicated procedure, converting the data of the second and third set into coordinates of the first plot and then adding an extra axis. Is there a way to do this more simply...? Thanking you and wishing you all an excellent Sunday! Cheers, Georg. ************************* Georg

Dear R community, I have a dataframe with say 100 different variables. I wish to regress variable 1 separately on every other variable (2-100) in a linear regression using lm. There must be an easy way to do this without loops, but I have difficulties figuring this out... Can you please help? Thank you and best regards, Georg. ***************************************** Georg Ehret Johns Hopkins

Dear R community, I wish to combine two tables in one by adding an additional dimension: e.g.: > t1<-as.table(matrix(rnorm(40),nrow=4,ncol=10));rownames(t1)<-c("rowone","rowtwo","rowthree","rowfour") > t1 A B C D E F G H I J rowone

Dear Ms. R, I struggle with a very basic command for most of you: How to change the working-directory by command-line? Thank you! Georg. ****************** Georg Ehret Johns Hopkins University School of Medicine Broadway Research Building, Room 572 733 N. Broadway Baltimore, MD 21205 Phone: (410) 502-7530 Fax: (410) 502-7544 e-mail: georg@jhmi.edu [[alternative HTML version deleted]]

Dear R community, I am plotting a histogram and would wish to display another variable of the same dataset in a very narrow heatmap just below the x-axis. Never mind the specifics of my task: How can I draw a second graph/image just below a first graph/image? Thank you! Georg. *************** Georg Ehret JHU Baltimore, MD 21043, USA [[alternative HTML version deleted]]

Dear R community, I am using densityplot (lattice package) for a large dataset and wish to print it to a jpeg (the pdf is huge). R crashes consistently. Am I doing it wrong or is densityplot incompatible with jpeg? I work on a Mac, R 2.7.0. > require(lattice) > jpeg("test.jpeg") > d[1:10] [1] 0.700218 0.700175 0.700357 0.700847 0.698286 0.701520 0.698158 0.699300 0.698819

I am trying to draw a plot like Matlab does: The upper extreme whisker represents 95% of the data; The upper hinge represents 75% of the data; The median represents 50% of the data; The lower hinge represents 25% of the data; The lower extreme whisker represents 5% of the data. It looks like: --- 95% | | ------- 75% | | |-----| 50% | | | | -------

Dear R community, I wish to include a variable (e.g. slice of "a" below) in another variable's name. My objective would be to get a variable-name "data_A" and so on. How can I do this? > a<-LETTERS[1:25] > a [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J"

Dear R community, I am using 6 variables to test for an effect (by linear regression). These 6 variables are strongly correlated among each other and I would like to find out the number of independent test that I perform in this calcuation. For this I calculated a matrix of correlation coefficients between the variables (see below). But to find the rank of the table in R is not the right

Dear R community, I am using a dataset and would like to define new variables using a R variable: e.g. for (i in 1:10){ dataset$i<-something } But this is not the right way, I get only one variable in "dataset"... How can I change this? Thank you! Georg. ************************ Georg Ehret Johns Hopkins Baltimore, MD [[alternative HTML version deleted]]

Dear R Usergroup, I have the following vector and I would like to split it on ",". How can I do this? > u [1] "160798191,160802762,160813395,160816017,160817873,160824082,160825247,160826925,160834272,160836257," Thank you in advance! With my best regards, Georg. ************************************ Georg Ehret Baltimore USA [[alternative HTML version deleted]]

Dear R communtiy, I do not understand why this does not work...: > betaS$SBP [1] 0.03274 -0.04216 -0.08986 -0.45980 0.60320 -0.63070 -0.05682 0.20130 > t<-c("betaS$SBP") > t [1] "betaS$SBP" > get(t) Error in get(t) : object 'betaS$SBP' not found [I am trying to use the variable "t" in a loop to call many different objects, but the

Dear R comunity, I am printing a number in a graph using "text(...)" - see code below: "fraction" is my number. I wish to print only two digits of the number and struggle to do this... options(digit=3) does not work... Thank you for your suggestions! Cheers, Georg. ********************************** Georg Ehret Johns Hopkins Baltimore

Dear R community, Can I please get some advice on the following: I wish to obtain a list of residuals, padded by NAs for NAs in my source data. I tried several options of "na.action", but did not succeed... Example: I would like to get "0,0,0,0,NA,NA": > a [1] 1 2 3 4 NA 9 > b [1] 3 4 5 6 7 NA > lm(a~b)$residuals 1 2 3 4 0 0 0 0 >

Dear R community, I encounter a problem reading data into a dataframe. See attachment for the input. I use: data<-read.table("test",fill=T,row.names=1) When you look at "data" you can see that some lines of my input were broken... I can avoid this problem by sorting the lines by length... Do I have it wrong or is there a bug? Thanks and wishing you a great remainder of

Dear R community, I have data on beta&standard error (for the main effect of variable x), stratified by sex for my dataset. I wish to calculate the sex-interaction effect (as beta&se) from these two stratified datasets. Is there a package to do this? If not, any advice how to do it manually? Thank you very much and best regards, Georg. ************************ Georg Ehret, JHU,

Dear R community, I am trying to assign a new variable (named "new") to multiple dataframes by a loop and do not succeed... Can you please help? Thank you and best regards, Georg Ehret. > c V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 1 1 11 21 31 41 51 61 71 81 91 2 2 12 22 32 42 52 62 72 82 92 3 3 13 23 33 43 53 63 73 83 93 4 4 14 24 34 44 54 64 74 84 94 5 5 15 25 35 45 55 65

Dear R community, I have a fairly large file with variables in rows. Every variable (thousands) needs to be regressed on a reference variable. The file is too big to load into R (or R gets too slow having done it) and I do now read in line by line with "scan" (see below) and write the results to out. Although improved, this is still very slow... Can someone please help me and suggest