```Date: Dec 8, 2012 4:39 PM
Author: S Ehtesham Al Hanif
Subject: How to generate Joint frequency distributions from a mxn Matrix

I have three column but i can avoid first one which has time value. In details:Column T has value of time as second t=1:1:1400;Column A has value of velocity/speed and it has 1400 speed values from 0(zero) to 100(hundred). In this case some velocity values repeats after uncertain interval.Column B has value of acceleration and it has 1400 acceleration/deccelaration values from --4(minus four) to +4(four). In this case some acceleration values has repetition.Now i want to generate a mxn matrix where every position will be a frequency which can full fill one condition from A and same time one corresponding B condition.I subdivided velocity column into several group, such as: 0 to 5, 5 to 10, 10 to 15, 15 to 20 .........90 to 95 and 95-100.Similarly i subdivided acceleration column into several group such as: -4 to -3, -3 to -2 ...... 2 to 3 and 3 to 4.Then, i will count frequency such a way that it will full fill both columns same row with those condition. As an example: if i look at the previous posts Column A. And Column B, then i have to find out how many times/frequency the below conditioned fullfilled?If velocity range : 30 to 35 m/s and acceleration at the same time/row in -0.5 to -0.25 range ? According to example it has frequent/count 3! If velocity range same but acceleration condition changed to -0.25 to 0 then it has frequency 1.I think this time my illustration is better as if it is possible to show you by showing picture or figure by attaching here it will be easy to explain what i am planning for!Here I am showing an example in below links:[URL=http://imageshack.us/photo/my-images/706/captureyt.png/][IMG]http://imageshack.us/a/img706/3983/captureyt.png[/IMG][/URL]Ehtesham
```