M2SCI function
Last update : 7/4/2004
mtlb_diff - Matlab diff emulation function
Description
Matlab and Scilab diff behave differently in some particular cases:
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With two input parameters: Scilab diff considers all values of first input as a vector
what Matlab does not.
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With three input parameters: If dimension of first input along dimension given by third parameter
reaches 1 before n interations
have been made,Matlab switches to next non-singleton dimension what Scilab does not.
The function mtlb_diff(A[,n[,dim]]) is used by
mfile2sci to replace diff(A[,n[,dim]]) when it was not
possible to know what were the inputs while porting Matlab code to Scilab. This function will
determine the correct semantic at run time. If you want to have a
more efficient code it is possible to replace mtlb_diff calls:
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With two inputs, if A is a scalar or a vector
mtlb_diff(A,n) may be replaced by diff(A,n)
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With three inputs, if size of A along dimension given by dim can not reach 1
mtlb_diff(A,n,dim) may be replaced by diff(A,n,dim)
Caution: mtlb_diff has not to be used for hand coded functions.
Authors
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V.C.