Srini
You should probably look at ?hist. If you look at the "value" section, you will see that you can get the information you want from the values returned from hist. If these are microarray probes and intensities, there may be specific methods for visualizing the data available from the bioconductor project (www.bioconductor.org).
Hope this helps, Sean
----- Original Message ----- From: "Srinivas Iyyer" <[EMAIL PROTECTED]>
To: "Rhelp" <r-help@stat.math.ethz.ch>
Sent: Monday, February 21, 2005 6:21 PM
Subject: [R] Distribution
Dear group, apologies for asking a simple question. I have a file where the data looks like this: Probe Intensity 0:0 501.0 1:0 17760.5 2:0 511.0 3:0 18468.3 4:0 199.8 5:0 508.0 6:0 17241.8 7:0 507.5 8:0 17910.0 9:0 482.5 10:0 17480.3 11:0 434.0 12:0 17631.3 13:0 444.8 14:0 17423.0 15:0 505.3 16:0 16693.0 17:0 438.5 18:0 16920.0 19:0 491.3 20:0 16878.0 21:0 486.3 22:0 16582.0 23:0 483.8 24:0 16694.8 25:0 452.3 26:0 16221.5 27:0 438.3 28:0 17119.8 29:0 455.5 30:0 16579.0 31:0 424.5 32:0 16691.3 33:0 472.0
My question is how do I know the distribution of the intensities. My aim is to find out the number of intensities or probes that fall in a certain range.
For example 500 probes has intensities ranging from 50 to 150.
300 probes has intensities ranging from 151-250
I have no clue how to do it for 500,000 probes. Can any one please help doing it in R.
thanks and apologies again
srini
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