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// Scilab ( http://www.scilab.org/ )
// Copyright (C) INRIA - Serge STEER
//
function I=sub2ind(dims,varargin)
//sub2ind is used to determine the equivalent single index
//corresponding to a given set of subscript values.
//I = sub2ind(dims,i1,i2,..) returns the linear index equivalent to the
//row, column, ... subscripts in the arrays i1,i2,.. for an matrix of
//size dims.
//I = sub2ind(dims,Mi) returns the linear index
//equivalent to the n subscripts in the columns of the matrix Mi for a matrix
//of size dims.
d=[1;cumprod(matrix(dims(1:$-1),-1,1))]
for i=1:size(varargin)
if varargin(i)==[] then I=[],return,end
end
if size(varargin)==1 then //subindices are the columns of the argument
I=(varargin(1)-1)*d+1
else //subindices are given as separated arguments
I=1
for i=1:size(varargin)
I=I+(varargin(i)-1)*d(i)
end
end
endfunction
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