[R] Plotting very skewed data in barplot

2007-07-03 Thread Dr. med. Peter Robinson
Dear R'ers, I would like to use barplot or a similar function to plot data demonstrating the distribution of the length of a kind of conservation in about 25000 DNA sequences. My data look like this: #Total sequences: 23873 0 19936 1 218 2 391 3 477 4 360 5 431

[R] Adding Scale to image

2007-01-30 Thread Peter Robinson
Dear List, I have used the image() function to show a heat plot of a matrix of data whose intensity is color-coded. I have two questions that I have not been able to solve by using the help system or google. 1) How can one add a scale/legend that shows what numerical values a given color corr

Re: [R] Basic: setting resolution and size of an R graphic

2005-10-25 Thread Dr. med. Peter Robinson
out.pdf then out.pdf looks rather poor (pixelly). The original image is too big. ANy ideas? Thanks a lot,Peter Am Mo, 24.10.2005, 22:53, schrieb Marc Schwartz (via MN): > On Mon, 2005-10-24 at 22:32 +0200, Dr. med. Peter Robinson wrote: > >> Dear List, >> >> >> I am sor

[R] Basic: setting resolution and size of an R graphic

2005-10-24 Thread Dr. med. Peter Robinson
Dear List, I am sorry if this perhaps a too basic question, but I have not found an answer in Google or in the R help system. I am trying to use R to do a very simple analysis of some data (RT-PCR and Western analysis) with a T-test and to plot the results as a histogram with error bars. (I have p

[R] beginner's question: Graphical presentation of t test

2003-06-05 Thread peter robinson
Hi, Is there any way to use R to present t test results for three groups of experiments, each of which involves several parallel experiment series with groups of control vs treated. I would like to present the average fold change of the experimental parameter (concentration of enzymes) as bars