## Removing values form the Matrix

Asked by M@lik Ali

### M@lik Ali (view profile)

on 13 Mar 2013
Accepted Answer by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

Hi, All

i have two matrix matrix A has size 2 62 matrix B has size 10 62

actually the matrix B contains also matrix A

i want to remove the matrix A from matrix B.

How i can do this

## Products

No products are associated with this question.

### Azzi Abdelmalek (view profile)

Answer by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 13 Mar 2013
Edited by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 13 Mar 2013
```for k=1:size(B,1)
if isequal(B(k:k+1,:),A)
idx=k
break
end
end
B(idx:idx+1,:)=[]
```

M@lik Ali

### M@lik Ali (view profile)

on 13 Mar 2013

Thanks for the response,

``` but i think there must be a simple solution as
for the vector we have
B(ismember(B,A)) = [];
it works for the vector, i think there should be a solution for the matrix```
Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 13 Mar 2013
```B(find(all(ismember(B,A),2)),:)=[]
```
M@lik Ali

### M@lik Ali (view profile)

on 13 Mar 2013

thanks second one working gud

### Andrei Bobrov (view profile)

Answer by Andrei Bobrov

### Andrei Bobrov (view profile)

on 13 Mar 2013
Edited by Andrei Bobrov

### Andrei Bobrov (view profile)

on 13 Mar 2013

```B = randi(100,10,62);
A = B(4:5,:);
B(end,:) = A(1,:);     % your data
```
```[a,ii] = ismember(B,A,'rows');
iii = 1:size(A,1);
i1 = strfind(ii(:)',iii) + iii - 1;
B(i1,:) = [];
```

M@lik Ali

### M@lik Ali (view profile)

on 13 Mar 2013

sorry it is not working

Andrei Bobrov

on 13 Mar 2013

corrected

Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 13 Mar 2013

This solution is more general

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi test

### Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.