jos
4b458d1779
Removed redundant imports
2016-10-21 17:58:53 +02:00
jos
22508ed8eb
Moved constants in erf to the bottom (doc generator picks the first comment from a function)
2016-10-21 17:57:39 +02:00
Pat Grasso
d2ae67cca3
erf(Infinity) should return 1, not NaN
...
Likewise, erf(-Infinity) should be -1. This is true for any really large
|x|...say, |x| > 2^53.
2016-10-20 15:54:02 -04:00
Pat Grasso
a71cba9a7d
Add TODO comments for future considerations
...
Specifically, implementation of erfi() (complex error function) and
precision when x is a bignumber.
2016-10-20 15:33:10 -04:00
Pat Grasso
57f082f64d
Use internal sign() (Math.sign only in ES2015+)
2016-10-20 15:33:10 -04:00
Pat Grasso
ee41e35b5c
Fix erf(bignumber) -> bignumber to return proper value
...
Note: The precision for the bignumber returned may not be accurate, as
the `erf()` approximation only guarantees precision to a certain degree.
2016-10-20 15:33:10 -04:00
Pat Grasso
80fd73c115
Update submodule index files to include erf
2016-10-20 15:33:09 -04:00
Pat Grasso
6ae793edea
Implement erf(x) using W. J. Cody's approximation
...
Translate the Fortran77 implementation of W. J. Cody's "Rational
Chebyshev Approximations for the Error Function".
Place in new function subdirectory, `function/special`, because this
function doesn't seem to fit into any other category.
2016-10-20 15:33:09 -04:00
