matplotlib-users Mailing List for matplotlib

try: x,y=np.loadtxt(f3,unpack=True)
without the str().
On Fri, May 20, 2011 at 11:20 PM, uxv2g <am...@co...> wrote:
>
> So, I installed EPD python for mac. From the terminal I go into a directory
> where the file I'd like to read exists. In a python program I create a 2
> column data array and below I open it as "f3". The line in bold is that
> referenced in the error. fwiw I'm just trying to do an easy x,y plot and
> this is my first python attempt.
> ....
>    f3=open(sys.argv[1]+ext, 'r')
>
>    import matplotlib.pyplot as plt
>    import numpy as np
>
>    x,y=np.loadtxt(str(f3),unpack=True)
>
>    plotfile='sys.argv[1].png'
>    plt.plot(x,y)
>    plt.xtitle('step number')
>    plt.ytitle('energy')
>    plt.grid("off")
>    plt.output(plotfile,'png medium transparent picsize 600 400')
>    f3.close()
> ....
> ***error below&***
> File "SCFscript.py", line 40, in <module>
>  x,y=np.loadtxt(str(f3),unpack=True)
> File
> "/Library/Frameworks/Python.framework/Versions/7.0/lib/python2.7/site-packages/numpy/lib/npyio.py",
> line 635, in loadtxt
>  fh = open(fname, 'U')
> IOError: [Errno 2] No such file or directory: "<open file 'gq_1014.log.hy',
> mode 'r' at 0x2a93e8>"
>
> *****
> The file exists, I checked. Where is it looking? In the python framework
> directory above? Shouldn't it be opening the file from the current
> directory? Am I missing something here?
>
> Thanks for any help!!
>
>
> --
> View this message in context: http://old.nabble.com/numpy.loadtxt-is-not-finding-an-existing-file.-What%27s-up--tp31668985p31668985.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
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Hi all,
I'm trying to set up a callback for when the limits of an interactive
axes object, with an image plot, has its limits changed. The callback
itself is somewhat expensive, and the zooming procedure seems to
figure sequential events for each axis -- x and y -- that is changed.
This results in doubling up on the work that is done.
Is there a way to either suppress until the display itself is updated,
or to connect to a single event that gets called when both axes are
changed?
Thanks!
-Matt