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| author | tadf <tadf@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-06-29 16:25:11 +0000 |
|---|---|---|
| committer | tadf <tadf@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-06-29 16:25:11 +0000 |
| commit | 183a9861c13b446704c51dc76aa463c86c8a7d11 (patch) | |
| tree | eada22a1c101245a619ede954f2b45cb9b0a900c /lib | |
| parent | b6fa066b8f617f252177ece93903b02773467d3e (diff) | |
| download | ruby-183a9861c13b446704c51dc76aa463c86c8a7d11.tar.gz ruby-183a9861c13b446704c51dc76aa463c86c8a7d11.tar.xz ruby-183a9861c13b446704c51dc76aa463c86c8a7d11.zip | |
* lib/cmath.rb (log2, cbrt): added. [experimental]
git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@23900 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/cmath.rb | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/lib/cmath.rb b/lib/cmath.rb index 6b47e70a1..c4b14e3ef 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 |