MATLAB: Array size mismatch cellfun

cell arraysmatrix arraymatrix manipulation

Help me.

D = {[1 2],[1 1] ;[1 6 ],[5 2]}
L=[1 0 0 0; 0 1 0 0 ]; 
out=cellfun(@(x) x*L,D,'un',0)

In result:

size(D)=(2,2) ,size(L)=(2,4) , size(out)=(2,2) Why the size(out) is not equal to (2,4),as by matrix multiplication

The output of cellfun must always satisfy size(out)=size(D). Cellfun always operates on D element by element.

One of the possibilities

D = {[1 2],[1 1] ;[1 6 ],[5 2]}
L=[1 0 0 0; 0 1 0 0 ]; 
out=cellfun(@(x) x*L,D,'un',0)

%or maybe

cell2mat(D).*L

>> inp = rand(2,108,401);
>> out = mat2cell(inp,2,2*ones(1,54),401);

and check the output:

>> size(out)
ans =
     1    54
>> size(out{1})
ans =
     2     2   401