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Function std.math.log1p
Calculates the natural logarithm of 1 + x.
real log1p
(
real x
) pure nothrow @nogc @safe;
For very small x, log1p(x) will be more accurate than log(1 + x).
| x | log1p(x) | divide by 0? | invalid? |
|---|---|---|---|
| ±0.0 | ±0.0 | no | no |
| -1.0 | -∞ | yes | no |
| <-1.0 | NAN | no | yes |
| +∞ | -∞ | no | no |
Authors
Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger
License
Copyright © 1999-2018 by the D Language Foundation | Page generated by ddox.