Re: [f2py] f2py Arrays and Fortran functions

I'm confused about exactly what you're doing. You shouldn't have any
problem passing python arrays to a Fortran subroutine that's exactly
what f2py is designed to do.

For example

>>> A1=rand(9,8)
>>> A2=rand(9)
>>> A2=rand(9,7)
>>> f2pymodule.fn(A1,A2,A3)

Where in your fortran source file, you have
subroutine fn(n,m,l,A1,A2,A3)
!intent(inout) A1,A2,A3
integer n,m,l
real*8  A1(n,m),A2(n),A3(n,l)
<do stuff with A1,A2,A3>
return
end subroutine fn


On Sat, May 9, 2009 at 1:22 AM, Leon Adams <[email protected]> wrote:
> Hi all,
>
> I am new to f2py and am having some difficulties with array operation. Here
> is my design difficulties:
>
> Using python as a glue, I initialize my problem. This involves generating a
> series of arrays and matrices. I pass an array and two matrices to FORTRAN
> and return an augmented matrix like so:
>
>
> Python
>
> A1[x],   A2[x,y]   A2[x,z]
>
> pass to FORTRAN        fn(A1,A2,A3)  with intent inout A3
>
> in FORTRAN I have a series of subroutines and functions to preform my
> numeric calculations
>
> FORTRAN
>
> subroutine sub(A1,A2,A3,x,y,z)
>
> calculations using A1,A2,A3,x,y,z
>
> call function using data passed from python as in:
>
> function fun(A1,...x,y)
>
> And here is where my problems start.  FORTRAN does not like passing of
> Arrays. Solutions I thought of was to make the input data from python GLOBAL
> in scope in FORTRAN, but I haven't found any documentation on how to acheive
> this either with COMMON or MODULES viz a viz F2PY. Any suggestion would be
> appreciated.
>
> Thanks in advance
>
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