Maybe rle can gelp get all sign changes, as in your second example:
pdl> $a=pdl[ 5.3332316, 4.3332316, 3.3332316, 2.3332316, 1.3332316,
0.33323163, -0.66676837, -1.6667684, -2.6667684, -3.6667684]
pdl> p $a
[ 5.3332316 4.3332316 3.3332316 2.3332316 1.3332316 0.33323163
Hello all,
I'm trying to find the series resonant frequency of an RF component, which
is where the component reactance switches from positive to negtive or
vice-versa.
Given an N-vector PDL of sorted elements, I need to know at what index it
switches from positive to negative.
Here are some
