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Справка Scilab >> Функции для совместимости > mtlb_prod


Matlab prod emulation function


Matlab and Scilab prod behave differently in some particular cases:

  • When called with one input: Matlab prod threts the values along the first non-singleton dimension of input while Scilab prod threats all values of input.

  • When called with two inputs: Matlab prod can be used with second input giving a non-existing dimension of first input while Scilab prod returns an error message.

The function mtlb_prod(A[,dim]) is used by mfile2sci to replace prod(A[,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_prod calls:

  • When called with one input, if A is an empty matrix, a scalar or a vector, mtlb_prod(A) may be replaced by prod(A)

  • When called with one input, if A is a not-empty matrix, mtlb_prod(A) may be replaced by prod(A,1)

  • When called with one input, if A is a multidimensional array, mtlb_prod(A) may be replaced by prod(A,firstnonsingleton(A))

  • When called with two inputs, if dim is lesser than the number of dimensions of A mtlb_prod(A,dim) may be replaced by prod(A,dim)

Caution: mtlb_prod has not to be used for hand coded functions.

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Last updated:
Fri Apr 11 14:19:50 CEST 2014