## Question regarding a find function(search for data)

on 26 May 2013

### Azzi Abdelmalek (view profile)

Hi, I have the following matrix:

data=[10 1 2 3; 11 4 5 6; 12 7 8 9; 17 4 5 6]

I want to do a query with the following matirx:

built a matrix base on the element value 10 and 17

lookfor=[10;17]

And I'm looking for the following result(values associate with 10 and 17 in this case)

anwser=[10 1 2 3; 17 4 5 6]

I'm looking for a dynamic anwser, data matrix and lookfor matrix will vary and be much more bigger.

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### Azzi Abdelmalek (view profile)

on 26 May 2013
Edited by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 26 May 2013
out=[data(any(data==17,2),:);data(any(data==10,2),:)]

%or

out=data(any(ismember(data,lookfor),2),:)

Gimpy

### Gimpy (view profile)

on 26 May 2013

using: out=data(any(ismember(data,lookfor),2),:)

Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 26 May 2013

How did you find anwser=[10 1 22 33; 11 8 10 12]

the cyclist

### the cyclist (view profile)

on 27 May 2013

Looks like he wants to find rows that start with 10, and sum them into one row. Then find rows that start with 11, and sum them.

### the cyclist (view profile)

on 26 May 2013
Edited by the cyclist

### the cyclist (view profile)

on 26 May 2013
rowIndex = ismember(data(:,1),lookfor);