[Numpy-discussion] Different results from repeated calculation

Keith Goodman kwgoodman at gmail.com
Sun Jan 28 11:48:31 CST 2007


On 1/28/07, Charles R Harris <charlesr.harris at gmail.com> wrote:
> How come your computation is so sensitive to these small effects?

I don't know.

The differences I am seeing are larger than in the test script---but
still of the order of eps. Each time step of my simulation selects a
maximum value and then uses that for the next time step. Depending on
which item is chosen of several items that are very close in value,
the simulation can head in a new direction.

I guess, as always, I need to randomly perturb my parameters and look
at the distribution of test results to see if the effect I am trying
to measure is significant. I had no idea it was this sensitive.


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