Hi NS,

Looking at the graphs, it is not clear to me what is supposed
to be negative that is showing up positive. For example, both
graphs show a positive response, so they should show strong
positive correlations.

But consider, these correlations should all be 1 or -1, since
they seem to be based on iresp of a fixed shape BLOCK
function. The plots all look *exactly* the same, and the
differences you are seeing are simply truncation errors from
something.

Along those lines, is that cubic detrending in there? The iresp
time series are short, making them more susceptible to
artifacts from something like detrending and computational
truncations. Is one cubic and the other quadratic? Is is hard
to see...

- rick