logical on structure data

I need to perform a logical operation on array data in a structure, I'm close but cant quite find the neat & efficient solution.

The structure is:

 s = struct('binarydata',zeros(vidHeight,vidWidth), 'otherStuff', other);
 %then populate s in a loop
 ...

I then want to perform logical operation on the data in parts of s, eg elementwise and across a range of arrays in s, like this:

 result = and ( s(1).binarydata, s(2).binarydata,s(3).binarydata, ...);

but I'd like to be able to do dynamically in a loop, eg:

 result = and ( s(i:i+60).binarydata);

which doesn't work as s(i:i+60).binarydata only returns the 60th element. or

 result = and ( [s(i:i+60).binarydata]);

which doesn't work either because it concatenates the arrays.

I'm close but can't quite get the syntax right.

Answer 1

[Walter Roberson]

dimno = 1 + ndims( s(1).binarydata );
result = all( cat(dimno, s(i:i+60).binarydata ), dimno);

[Ben Modra]

Thanks Walter. That works for and(), but how about more generically for or() sum() max() etc. I have a feeling handles apply here but I'm not that familiar with them.

[Walter Roberson]

For "or":

result = any( cat(dimno, s(i:i+60).binarydata ), dimno);

for "max":

result = max( cat(dimno, s(i:i+60).binarydata ), dimno);

for "sum":

result = sum( cat(dimno, s(i:i+60).binarydata ), dimno);

[Ben Modra]

great, thanks Walter!