[R] Distribution

[Sean Davis]

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" <srini_iyyer_bio at yahoo.com>
To: "Rhelp" <r-help at 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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