MATLAB: Undesired behaviour of bsxfun and colon-operator

bsxfuncolon operatorMATLABsum

I have a problem using bsxfun for a certain user-defined function. A simplified version of it looks like this:
bsxfun(@(x,y)x+sum(0:y),(1:3)',6:9)
ans =
    22    29    37    46
    23    30    38    47
    24    31    39    48
This does exactly what I want. But if i use it with a single number of x it gives me:
bsxfun(@(x,y)x+sum(0:y),1,6:9)
ans =
    22
While I would like to get
ans =
    22    29    37    46
Any ideas to build a workaround for this problem?

Best Answer

A robust workaround using ndgrid and arrayfun and exactly the same function:
>> [X,Y] = ndgrid(1:3,6:9);
>> arrayfun(@(x,y)x+sum(0:y),X,Y)
ans =
   22   29   37   46
   23   30   38   47
   24   31   39   48
>> [X,Y] = ndgrid(1,6:9);
>> arrayfun(@(x,y)x+sum(0:y),X,Y)
ans =
   22   29   37   46
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