M2SCI function
Last update : 28/09/2007
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.