Hi, guys!

I am learning Ruby and want to write several speech codec to polish my
Ruby skill. I have several questions

1. I need some numeric lib, I found some like NArray, fftw-Ruby.
Mydevelopement evironment is Window OS and MingW. I wonder if I can use
all these libs under this kind of setup and do I miss something else.
And what is a good visualized tool? ruby-gnuplot?

2. Can anyone suggest a document for coding style of Ruby and a simple
open source project as an example?

Thanks a lot!