Zero on start X value

[Ensase]

Hello!
I've tried to run simple example before using in project:

f := piecewiselinear.Function{Y: []float64{100, 105, 120}}
f.X = piecewiselinear.Span(10, 16, len(f.Y))
fmt.Println(f.X)
fmt.Println(f.Y)
fmt.Println(
f.At(10), // f.At(x) evaluates f at x
f.At(11),
f.At(12),
f.At(13),
f.At(14),
f.At(15),
f.At(16),
)

And I've got the output:
[10 13 16]
[100 105 120]
0 101.66666666666667 103.33333333333334 105 110.00000000000001 115 120

Everything is fine except zero on defined X value.

Thank you

[sgreben]

Good catch, thanks! I've just pushed a fix and a test that should catch this case :) Tagged as release 2.0.4 now.

[sgreben]

I've also double-checked the output of the fixed code for your specific example:

[sgreben]

For convenience, here's the link to the release with the fix: https://github.com/sgreben/piecewiselinear/releases/tag/2.0.4 :)

[Ensase]

All works fine.
Thanks a lot!

[sgreben]

You're welcome! Thanks for finding the bug 👍