## Take mininum over only two dimensions of 4-d array

on 3 May 2013

### James Tursa (view profile)

I have a 4-D array array=[i,j,k,l]. For given values of i and j, I would like to know the minimum value in the array for any k or l, as well as the values of k and l for this value.

Basically I'd like something like [min_value, min_k, min_l]=min (array,[],3:4)

but min, as far as I can tell, doesn't take minima over multiple dimensions.

## Products

### James Tursa (view profile)

on 3 May 2013

```sub_array = array(i,j,:,:);
[V X] = min(sub_array(:));
[I J K L] = ind2sub(size(sub_array),X);
```

The minimum value in the specified sub array will be V, and the indexes for the 3rd and 4th dimensions will be K and L.

### Iman Ansari (view profile)

on 3 May 2013

Hi.

```R=reshape(1:16,[2 2 2 2]);
M=min(min(R,[],4),[],3);
```

### Andrei Bobrov (view profile)

on 3 May 2013

```a = randi(10,4,5,2,3); % eg
```
```s = size(a);
a1 = reshape(a,s(1),s(2),[]);
[m1,i1] = min(a1,[],3);
k = mod(i1-1,s(3))+1;
l = ceil(i1/s(3));
```

#### Join the 15-year community celebration.

Play games and win prizes!

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