interpolating many functions

I am trying to accelerate the following 'stylized' piece of
code.
basically I need to do 1-dim interpolation many times.

for i=1:N
V = interp1(grid,W(:,i),A)
keep(:,:,i) = squeeze(sum(Z.*V)) ;
end

where grid is a vector, W is a matrix, A is a large 3d
*array*.
if possible I'd like to get rid of the loop..

I thought there might be a way with interp2, but...

Any idea would be much appreciated!



.

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