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forcing multiple evaluation of a function
Hi ferreters,
As part of a Monte Carlo simulation, I've written an external function
which operates on the given data based on some random numbers it
generates. I want to evaluate the function several times on the SAME
data, but Ferret doesn't recognise that it needs to update the values.
Here's an example:
(The external function is called "omegasort_exc" and it returns two
scalars indexed on the k axis)
If I interactively LIST the result several times, the function gets
re-evaluated:
yes? list omegasort_exc(om,pr)
OMEGASORT_EXC(OM,PR)
LATITUDE: 3.8N to 5.7N
1 / 1: -0.001003
2 / 2: 0.000016
yes? list omegasort_exc(om,pr)
OMEGASORT_EXC(OM,PR)
LATITUDE: 3.8N to 5.7N
1 / 1: -0.001054
2 / 2: 0.000014
(the result changes)
But within a loop:
yes? repeat/l=1:2 list omegasort_exc(om,pr)
OMEGASORT_EXC(OM,PR)
LATITUDE: 3.8N to 5.7N
1 / 1: -0.001067
2 / 2: 0.000014
OMEGASORT_EXC(OM,PR)
LATITUDE: 3.8N to 5.7N
1 / 1: -0.001067
2 / 2: 0.000014
(the result does not change)
How can I force Ferret to re-evaluate the function on each pass through
the loop?
Thanks for any help,
Brian Rose
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