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