[R] Distribution

[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