Ruby mathematic gem

Question

does anybody know if there is a good gem for mathematic / geometric operations? I need some of this things:

• Dot product
• Cross product
• Angle betwe

Answer 1

Linalg https://github.com/wedesoft , I posted instructions how to install it here: http://www.quora.com/Installation-Instructions/How-do-I-install-Ruby-linalg-library-on-Mac