Request MATLAB tip

Hello DSP folks,

I am looking for a simple method to implement the following function:

I have a 3D matrix P(i, j, k) with the last index 'k' representing a
time variable. I also have a 3D matrix of time-delays d(i,j), and I
wish to delay the 3D P matrix using the delays specified by the 2D
matrix.

Is there anyway to do it directly in MATLAB, i.e., using a single
operation instead of a for loop over the indices i and j ? The for
loop implementation takes a long time to execute, and I was not able
to use the usual MATLAB constructs for handling matrices to implement
this. Is there a MATLAB function that can implement this faster ?

Any help is greatly appreciated.

Thanks,
Vijay.

> Is there anyway to do it directly in MATLAB, i.e., using a single
> operation instead of a for loop over the indices i and j ? The for
> loop implementation takes a long time to execute, and I was not able
> to use the usual MATLAB constructs for handling matrices to implement
> this. Is there a MATLAB function that can implement this faster ?


Show us the for loop so we can see exactly what you mean.