Date: Feb 6, 2013 5:07 PM
Author: dpb
Subject: Re: Counting problem
On 2/6/2013 3:40 PM, Erasmus wrote:

> hello everyone, I want count how many times of number meet the specific

> criteria.

> for example, I have two matrix, A and B, I want to count the how many

> times of element meet two criteria,1) the element in A is less than 1;

> 2) the corresponding element(in the same location) in B is larger than 50,.

>

> for example

>

> A= [ 0.1 0.2 0.5

> 0.9 1.3 1.2 0.7 1.2 1.5]

> B=[2 34 43

> 54 55 56

> 62 43 45]

>

> so meet the times meeting these two criteria is 2 times, location[3,1]

> and [2,1]

>

>> ix=find(A<1);

>> iab=intersect(ix,find(B(ix)>50));

>> N=length(iab) % count

N =

2

>> [i,j]=ind2sub(size(A),iab);

>> disp([i j]) % locations

2 1

3 1

>>

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