[Numpy-discussion] Fortran binary files and numpy/scipy

Nils Wagner nwagner@iam.uni-stuttgart...
Mon Feb 2 08:22:42 CST 2009


On Mon, 2 Feb 2009 13:39:32 +0100
  Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
> Hi,
> 
> There was a discussion about this last week. You can 
>find it int he archives ;)
> 
> Matthieu
  
Hi Matthieu,

Sorry but I missed that.
Anyway I have some trouble with my short example.

g77 -c binary_fortran.f
g77 -o io binary_fortran.o
./io

  11 254  254.
  12 253  126.
  13 252  84.
  14 251  62.
  15 250  50.
  16 249  41.
  17 248  35.
  18 247  30.
  19 246  27.
  20 245  24.

python -i read_fortran.py

>>> a
array([(16, 1090921693195, 254.0), (16, 16, 
5.3686493512014268e-312),
        (4638566878703255552, 16, 
7.9050503334599447e-323),
        (1082331758605, 4635611391447793664, 
7.9050503334599447e-323),
        (16, 1078036791310, 62.0), (16, 16, 
5.3049894774872906e-312),
        (4632233691727265792, 16, 
7.9050503334599447e-323),
        (1069446856720, 4630967054332067840, 
7.9050503334599447e-323),
        (16, 1065151889425, 35.0), (16, 16, 
5.2413296037731544e-312),
        (4629137466983448576, 16, 
7.9050503334599447e-323),
        (1056561954835, 4628293042053316608, 
7.9050503334599447e-323),
        (16, 1052266987540, 24.0)],
       dtype=[('irow', '<i8'), ('icol', '<i8'), ('value', 
'<f8')])

How can I fix the problem ?

Nils
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