diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | lib/cmath.rb | 24 |
2 files changed, 26 insertions, 2 deletions
@@ -1,3 +1,7 @@ +Tue Jun 30 01:24:10 2009 Tadayoshi Funaba <tadf@dotrb.org> + + * lib/cmath.rb (log2, cbrt): added. [experimental] + Tue Jun 30 01:19:53 2009 Tadayoshi Funaba <tadf@dotrb.org> * complex.c (nucomp_expt): do not use rb_fexpt. diff --git a/lib/cmath.rb b/lib/cmath.rb index 6b47e70a15..c4b14e3ef6 100644 --- a/lib/cmath.rb +++ b/lib/cmath.rb @@ -4,8 +4,10 @@ module CMath alias exp! exp alias log! log + alias log2! log2 alias log10! log10 alias sqrt! sqrt + alias cbrt! cbrt alias sin! sin alias cos! cos @@ -47,6 +49,14 @@ module CMath end end + def log2(z) + if z.real? and z >= 0 + log2!(z) + else + log(z) / log!(2) + end + end + def log10(z) if z.real? and z >= 0 log10!(z) @@ -74,6 +84,14 @@ module CMath end end + def cbrt(z) + if z.real? and z >= 0 + cbrt!(z) + else + Complex(z) ** (1.0/3) + end + end + def sin(z) if z.real? sin!(z) @@ -186,10 +204,14 @@ module CMath module_function :exp module_function :log! module_function :log + module_function :log2! + module_function :log2 module_function :log10! module_function :log10 module_function :sqrt! module_function :sqrt + module_function :cbrt! + module_function :cbrt module_function :sin! module_function :sin @@ -221,8 +243,6 @@ module CMath module_function :atanh! module_function :atanh - module_function :log2 - module_function :cbrt module_function :frexp module_function :ldexp module_function :hypot |