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Thanks much John & Perry!  Part of my confusion was the fact that I'm
using numarray on my laptop/Windows and Numeric on Linux... and I was in
a hurry... and general ignorance.  Anyway, thanks again.

Randy

> -----Original Message-----
> From: Perry Greenfield [mailto:pe...@st...]
> Sent: Thursday, April 08, 2004 1:48 PM
> To: John Hunter; Randy Heiland
> Cc: mat...@li...
> Subject: RE: [Matplotlib-users] writing binary array to file
> 
> John Hunter wrote:
> > Best is to use the binary string operations tostring and fromstring
> >
> >     from Numeric import fromstring, Float
> >     # write
> >     file('fname.out', 'wb').write(x.tostring())
> >
> >     # read
> >     x = fromstring(file('fname.out', 'rb').read(), Float)
> >
> >     #If data is MxN you'll need to reshape
> >     x.shape = M,N
> >
> > Hope this help,
> > JDH
> >
> 
> Note that numarray has a tofile method and a fromfile function
> to do this without going through the copying required by tostring
> and fromstring. Like those, it also doesn't save any shape or
> type info in the file.
> 
> Perry
> 

>>>>> "Greg" == Greg Whittier <gr...@th...> writes:

    Greg> but currently there doesn't seem to be a way to discern
    Greg> whether the current xaxis.viewlim was manually set or is the
    Greg> result of autoscale.  Should this be a feature (set_xlim
    Greg> "sticks")?  Does Axis need an autoscale attribute to enable
    Greg> this?

OK, just added this to CVS.  Thanks for the suggestion.  Until the
next release, you can just put the xlim set after the plot commands. 

    Greg> This is version 0.52 (which btw has matplotlib.version set
    Greg> to '0.51').

Fixed - thanks,
JDH

John Hunter wrote:
> Best is to use the binary string operations tostring and fromstring
> 
>     from Numeric import fromstring, Float
>     # write
>     file('fname.out', 'wb').write(x.tostring())
> 
>     # read
>     x = fromstring(file('fname.out', 'rb').read(), Float)
> 
>     #If data is MxN you'll need to reshape
>     x.shape = M,N
> 
> Hope this help,
> JDH
> 

Note that numarray has a tofile method and a fromfile function
to do this without going through the copying required by tostring
and fromstring. Like those, it also doesn't save any shape or
type info in the file.

Perry

>>>>> "Randy" == Randy Heiland <he...@in...> writes:

    Randy> What's the easiest way to write a Numeric array to a file?

Easiest or best?

In the next release I've added load and save funcs for converting
arrays to and from ascii files.  But this is slow and generally lossy.

Best is to use the binary string operations tostring and fromstring

    from Numeric import fromstring, Float
    # write
    file('fname.out', 'wb').write(x.tostring())

    # read
    x = fromstring(file('fname.out', 'rb').read(), Float)

    #If data is MxN you'll need to reshape
    x.shape = M,N

Hope this help,
JDH

What's the easiest way to write a Numeric array to a file?
Thanks!  --Randy