Hi all! Thank you very much indeed for developing such a useful tool!
I am learning PDL at the moment and I am really pleased how simple calculations can be done with Perl. But now I obtained an unexpected result from "fftconvolve" that I do not understand. A simple example is like this: I convolve two 1D piddles, the first is zero except for one value which is 1. The second one has a gaussian shape. I expect as the result a piddle which contains a gaussian shape converging to zero far away from the center. The resulting piddle shows the expected gaussian shape but is not converging to zero, instead of that to a negative constant value. It seems that the result has a negative offset. If I do the convolution with "convolve" instead of "fftconvolve" the result is exactly what I expect. Does someone has an idea why fftconvolve has this (for me) unexpected and (for me) incorrect behavior? Many thanks! Andreas _______________________________________________ Perldl mailing list [email protected] http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
