README
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fltcmp
Go float comparison using Units in the Last Place (ULPs). You can find a good write up of the method here.
When you test for float equality, you typically aren't looking for an exact match. What you might end up doing is testing for equality with some constant error threshold. The problem with that is the behaviour is way different when comparing very small floats and very large floats. ULP testing is an alternative.
Benchmark
It's slow.
BenchmarkAlmostEqualDifferent-8 300000000 4.11 ns/op
BenchmarkAlmostEqualSame-8 300000000 3.98 ns/op
BenchmarkEpsilonSame-8 2000000000 0.30 ns/op
BenchmarkEpsilonDifferent-8 2000000000 0.30 ns/op
Documentation
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Overview ¶
Package fltcmp implements ULP float comparison. https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AlmostEqual ¶
AlmostEqual tells you how close two floats are. Make maxUlpsDiff 1 if they need be really, really close. Returns true if the ULP is within the threshold.
func AlmostEqual32 ¶
AlmostEqual32 tells you how close two floats are. Make maxUlpsDiff 1 if they need be really, really close. Returns true if the ULP is within the threshold.
func FloatDiff32 ¶
FloatDiff32 finds the ULP difference between two floats.
Types ¶
This section is empty.
Source Files
Directories