[R] Distribution

[Liaw, Andy]

You can use table(cut(intensity, breaks)), where `intensity' is the vector
of intensity values, and `breaks' are the boundaries of the bins (e.g., c(0,
150, 250,  ...)).

Andy

> From: Srinivas Iyyer
> 
> 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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