feval - multiple evaluation

Calling Sequence

[z]=feval(x,y,f)

[z]=feval(x,f)

Parameters

• x,y : two vectors
• f : function or character string (for Fortran or C call)

Description

Multiple evaluation of a function for one or two arguments of vector type :

z=feval(x,f) returns the vector z defined by

z=feval(x,y,f) returns the matrix

f is an external (function or routine) accepting on one or two arguments which are supposed to be real. The result returned by f can be real or complex. In case of a Fortran call, the function 'f' must be defined in the subroutine ffeval.f (in directory SCIDIR/routines/default)

Examples

deff('[z]=f(x,y)','z=x^2+y^2');
feval(1:10,1:5,f)
deff('[z]=f(x,y)','z=x+%i*y');
feval(1:10,1:5,f)
feval(1:10,1:5,'parab')   //See ffeval.f file
feval(1:10,'parab')
// For dynamic link (see example ftest in ffeval.f)
// you can use the link command (the parameters depend on the machine):
// unix('make ftest.o');link('ftest.o','ftest); feval(1:10,1:5,'ftest') 
 

See Also

evstr  horner  execstr  external  link