M2SCI function
Last update : 18/05/2014
mtlb_legendre - Matlab legendre emulation
function
Calling Sequence
- P = mtlb_legendre(n,X)
- P =
mtlb_legendre(n,X[,normflag])
Parameters
-
X: a scalar, vector, matrix or hypermatrix with elements in
[-1,1]
-
n: a positive scalar integer
-
normflag: a string ('sch' or 'norm')
Description
Matlab and Scilab legendre behave differently in some
particular cases:
-
-
-
Scilab legendre(m,n,X) evaluates the
legendre function of degree n and order n for the
X elements. Matlab legendre(n,X)
evaluates the Legendre functions of degree n and
order m=0,1,...,n. (emulated by mtlb_legendre) for
the X elements.
-
The option normflag= 'sch' doesn't exist for
Scilab legendre (emulated)
-
If X is a hypermatrix then Scilab
legendre(n,X) doesn't work (emulated)
The function mtlb_legendre(n,X[,normflag]) is used by
mfile2sci to replace legendre(n,X[,normflag])
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_legendre call:
-
-
If X is a scalar, a vector or a matrix
mtlb_legendre(n,X[,'norm']) may be replaced by
legendre(n,0:n,X[,'norm'])
Caution: mtlb_legendre has not to be used for hand coded
functions.
Authors
-
F.B.