pylab.save() File Name Syntax

Community matplotlib-users
#1

I want to save plots programmatically, using a variable + .png as the
filename. I don't see an example of the proper syntax, and my
trial-and-error approach hasn't yielded a solution, either.

   If I want to write

   pylab.save(curVar.png)

where 'curVar' is a variable assigned programmatically, how do I correctly
write it?

Rich

···

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Richard B. Shepard, Ph.D. | Integrity Credibility
Applied Ecosystem Services, Inc. | Innovation
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863

#2

Use string concatenation:
curVar+'.png'

<URL:http://docs.python.org/tut/node5.html#SECTION005120000000000000000>

hth,
Alan Isaac

···

On Thu, 31 Jan 2008, Rich Shepard apparently wrote:

   If I want to write
   pylab.save(curVar.png)
where 'curVar' is a variable assigned programmatically, how do I correctly
write it?

#3

Hi Rich,

bit confused what your asking.
are you looking for the pylab API savefig
http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-savefig

or you asking how to convert your variable+.png into a filename?
is your variable a number?, string?

for count in range(3):
    count = count +1
    fname = 'MyPlot_%d.png' %count
    print fname

mystr = 'MyFirstPlot'
fname = '%s.png' % mystr
print fname

results in
>python -u "test.py"
MyPlot_1.png
MyPlot_2.png
MyPlot_3.png
MyFirstPlot.png
>Exit code: 0

pylab.savefig('%s.png'% curVar)
   or
pylab.savefig('%d.png'% curVar)

Does anything here help?
Steve

Rich Shepard wrote:

···

   I want to save plots programmatically, using a variable + .png as the
filename. I don't see an example of the proper syntax, and my
trial-and-error approach hasn't yielded a solution, either.

   If I want to write

   pylab.save(curVar.png)

where 'curVar' is a variable assigned programmatically, how do I correctly
write it?

Rich

#4

bit confused what your asking.
are you looking for the pylab API savefig

Stephen/Alan/Chloe:

   Yes, it turns out that I am.

or you asking how to convert your variable+.png into a filename?
is your variable a number?, string?

   The variable is a string, and I do want to use it as a file name.

pylab.savefig('%s.png'% curVar)

   I wasn't aware of the savefig() function, and was trying to use save()
instead. As soon as I made that change, it worked.

Thanks for the lesson!

Rich

···

On Fri, 1 Feb 2008, Stephen George wrote:

--
Richard B. Shepard, Ph.D. | Integrity Credibility
Applied Ecosystem Services, Inc. | Innovation
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863