### 1 unstable release

0.1.0 | Apr 10, 2021 |
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#**1688** in Math

**564** downloads per month

Used in alpha_stable

**MIT**license

18KB

330 lines

# spfunc

Rust crate for numerical calculation of special functions.

This crate can calculate each special function for f32, f64, Complex32, Complex64 (from num_complex crate).

# Note

This crate is still in the development stage and the numerical calculations are not so accurate (especially Hurwitz zeta function).

# Functions

## The Gamma Function

- The gamma function
- The digamma function
- The polygamma function

## The Zeta Function

- The Riemann zeta function
- The Hurwitz zeta function

# How to use

`use` `spfunc``::``gamma``::``*``;`
`use` `cauchy``::``{`c32`,` c64`}``;`
`fn` `main``(``)`` ``{`
`println!``(``"`Gamma(1.0) = `{}``"``,` `gamma``(``1.``0``)``)``;`
`println!``(``"`ln(Gamma(1.0)) = `{}``"``,` `gamma_ln``(``1.``0``)``)``;`
`println!``(``"`Gamma(1.2+3.4i) = `{}``"``,` `gamma``(``c32``::`new`(``1.``2``,` `3.``4``)``)``)``;`
`println!``(``"`ln(Gamma(1.2+3.4i)) = `{}``"``,` `gamma_ln``(``c32``::`new`(``1.``2``,` `3.``4``)``)``)``;`
`println!``(``"`DiGamma(1.2+3.4i) = `{}``"``,` `digamma``(``c64``::`new`(``1.``2``,` `3.``4``)``)``)``;`
`println!``(``"`TriGamma(1.2+3.4i) = `{}``"``,` `polygamma``(``c64``::`new`(``1.``2``,` `3.``4``)``,` `1``)``)`
`}`

#### Dependencies

~0.6–1MB

~18K SLoC