threshold-filter:
description:
threshold-filter[t] ket
if x < t, return 0, else return x
combined with drop, eg: drop threshold-filter[t] sp
filter the given superposition to only those with coefficients >= t.
examples:
threshold-filter[2] (3|a> + 2.2|b> - 3 |c> + |d>)
3|a> + 2.200000|b> + 0|c> + 0|d>
drop threshold-filter[2] (3|a> + 2.2|b> - 3 |c> + |d>)
3|a> + 2.200000|b>
see also:
not-threshold-filter
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