[Scilab-users] Help about Scilab

[Dang, Christophe]

Hello,

> De : Pawel Postek
> Envoyé : mardi 3 février 2015 19:35
>
> c = nchoosek (n,m)
> I need to convert this code to Scilab.
> I'm trying to do this, but I fail.

The Mathworks page tells me that nchoosek () computes the binomial coefficient.

I suggest you read /Introduction to discrete probabilities in Scilab/

http://www.scilab.org/content/download/248/1706/file/introdiscreteprobas.pdf

section 2.10 " Computing combinations with Scilab" (p. 24-25) says

"There is no Scilab function to compute the binomial number"

And give the following solution :

// combinations --
// Returns the number of combinations of j objects chosen from n objects .
function c = combinations ( n , j )
c = exp( gammaln (n+1) - gammaln (j+1) - gammaln (n-j +1));
// If the input where integers , returns also an integer .
if ( and( round (n)==n) & and( round (j)==j) ) then
b = round ( b )
end
endfunction

Best regards

--
Christophe Dang Ngoc Chan
Mechanical calculation engineer
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