Spearman's rho in scilab

[Petter Wingren]

Hi!

I've been looking for a way to integrate my correlation analysis in scilab,
which needs spearmans rho.

Is there a ready-to-use package to install somewhere?

Otherwise I found this:
http://books.google.com/books?id=K4kMx3EWj9MC&pg=PA68&lpg=PA68&dq=spearman+scilab&source=bl&ots=KrBZp9IKya&sig=pCm0jcrnybCcwEfpMmzjmdJ_KNY&hl=en&ei=e-uyTrH3BNLQ4QTGxKTwAw&sa=X&oi=book_result&ct=result&resnum=5&ved=0CDkQ6AEwBA#v=onepage&q=spearman%20scilab&f=false

How do I implement this into scilab on my own so it becomes a useable
function? (if none exists already that is..)
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