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Is there a good way in R to impute values which exist, but are less than the detection level for an assay? Thanks, Jonathan Williams OPTIMA Radcliffe Infirmary Woodstock Road OXFORD OX2 6HE Tel +1865 (2)24356

Dear R Helpers, I have imported an SPSS file that contains date data. The data appear in R in a numeric format, as follows: 10485849600 10477641600 10561104000 10562745600 etc. I'd be extremely grateful if someone could tell me how...

When I use dev.print(pdf) and dev.copy(pdf) to print the *same* graph, the box around the legend is too small using dev.copy(pdf) - it cuts off the last letter of the (7-letter) labels. Jonathan Williams...

Oh dear - I joined the R help mailing list last week, in order to ask a specific question. I did not realise that I would start to receive all e-mails to and from the mailing list. Is there a...

Would anyone be so kind as to write a routine to time mouse button presses in R to the nearest millisecond? If R had a timer of this kind and a few basic screen handling routines (to write characters or...

Dear R helpers, I have a largish matrix (1300 x 1300) and I wish to find the row and column numbers that identify particular elements whose values I know in advance (for example, the row and column numbers for the...

I am trying to read data from a binary file. The file has a header of mixed data modes:- Bytes Length Mode 1-4 4 Integer 5-6 2 integer 7-8 2 integer ...... 15-18 4 integer 19-20...

Hi folks, I'm having some trouble understanding the intricacies of panel functions. I wish to create three side-by-side graphs, each with different data-- so far, so good: I rbind() the data, add a column of subscripts as...

I would like to collect the trees grown by rpart fits in an array, in order to be able to use them later to predict new data. I have tried to use parse and eval to do this, without success...

Dear R-helpers, I am having difficulty making R plot only integer labels on the x-axis of a simple graph. I want to plot the median values of a score on each of three occasions. Non-integer occasions are...

Hi Helpers, Does anyone know how to read jpeg, bmp or png files into R? I have some photos of brain scans and I want to quantify some aspects of their size. I might be able to do this with...

Dear R Helpers, Does anyone know how to use tcltk to display jpeg images? The manual says that one must use Tk_PhotoCreateImageFormat to register the jpeg image handler. The "ActiveTcl User Guide" (http://support.serv.ch/lang/tcl/img...

Dear R Helpers, I am running R 2.6.2 on a Windows XP machine. I am trying to use regexpr to locate full stops in strings, but, without success. Here an example:- f="a,b.c at d:" #define...

Dear R-helpers, I have been trying to figure out how to plot a graph with an axis label consisting of a mixture of Latin, Greek and subscript characters. Specifically, I need to write A[beta]{1-42}, where A...