Re: [R] Beginner question: How to replace part of a filename in read.csv?

2011-03-18 Thread pierz
Thank you both, it works! -- View this message in context: http://r.789695.n4.nabble.com/Beginner-question-How-to-replace-part-of-a-filename-in-read-csv-tp3384786p3386724.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project

[R] Beginner question: How to replace part of a filename in read.csv?

2011-03-17 Thread pierz
I would like to use samp as a part of a filename that I can change. My source files are .csv files with date as the file name, and I would like to be able to type in the date (later perhaps automate this using list.files) and then read the csv and write the pdf automatically. I have tried different

Re: [R] re-arranging data to create an image (or heatmap)

2011-03-08 Thread pierz
I have now advanced to image.plot from the "fields" package, which gives a nice color scalebar: image.plot(dat,col=imagecolsmat,xlab="time",ylab="abs") All that is left now is to change the scale on the x and y axis from 0 to 1 to the actual values. I do not understand why it does not read the pr

Re: [R] re-arranging data to create an image (or heatmap)

2011-03-07 Thread pierz
It turned out that rearranging the data was indeed the key to get the image I want. The way I do it now is this: tt <- read.csv(file="file.csv", header=T, sep=",", dec=".", stringsAsFactors=F) names(tt) <- c('time','abs') dat <- with(tt, table(time, abs)) image(dat,col=rainbow(256)) I'm now modif

Re: [R] re-arranging data to create an image (or heatmap)

2011-02-28 Thread pierz
Thank you for your quick reply. The change in transparency makes a big difference. I will have a look at the other packages to see if i can do multiple colors. -- View this message in context: http://r.789695.n4.nabble.com/re-arranging-data-to-create-an-image-or-heatmap-tp3327986p3328227.html

[R] re-arranging data to create an image (or heatmap)

2011-02-28 Thread pierz
Let me start by introducing myself as a biologist with only a little knowledge about programming in matlab and R. In the past I have succesfully created my figures in matlab using the hist3d command, but I have not access to matlab right now and would like to switch to R. I have used the plot comm