Thanks, I just figured this out right after I posted.  This should  
have been obvious, I guess I got brain tired.

Thanks again,
Eric
On Sep 23, 2009, at 2:13 PM, Jason Grout wrote:

>
> Eric Jackson wrote:
>> To address my dilemma regarding line plots, I read about matplotlib  
>> at
>> http://matplotlib.sourceforge.net/users/transforms_tutorial.html.
>> This is a library that a user can import into their Sage worksheet to
>> allow then more flexibility with plots.  When using matplotlib, the
>> user may have to apply certain backends to achieve visibility of
>> plots.  The backend the user applies depends solely on where he/she  
>> is
>> using matplotlib interactively from.
>>
>> A few minutes ago I published a sage worksheet called "Line Plot with
>> Matplotlib".  Cell 1 of this sheet shows a simple plot using a
>> hardcopy backend to create a PNG file.  This is an item that Jason
>> Grout helped me with.  Thanks Jason!  Cell 2 (#Their version from
>> matplotlib documentation) uses pylab instead of pyplot.  The code in
>> cell 2 was obtained from the matplotlib website.  I could not get  
>> this
>> to work, instead I inserted my own version in cell 3 (#My version),
>> which produces the same plot that cell 2 would produce had it worked.
>> If anybody can get cell 2 working, then that would be really cool.
>
> You can't use "show".  Use "savefig", as in:
>
> savefig('test.png')
>
> The sage notebook automatically displays any graphic file you generate
> in a cell.  That's why we need to save the figure to a graphics file,
> like test.png.  Then the notebook comes along, sees that the cell
> generated a graphic file, and displays it.
>
>
>>
>> *However, the code in cell 4, is where I really need the help.  The
>> code in cell 4 is suppose to display the xy data at a certain  
>> location
>> on the line plot.  I have looked at this for a while, but I am
>> confused as to why it doesn't work.  This code was also taken from  
>> the
>> mathplotlib website.  Any help on this in particular would be neat.
>> In my spare time, I will continue to work on this.
>
>
> Just change the last line to "plt.savefig..." just like the first  
> cell.
>  It's not "savefile", it's "savefig" :).
>
>
> Thanks,
>
> Jason
>
>
> >


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