On 01/12/12 Ben Root wrote:
On Thu, Jan 12, 2012 at 2:20 PM, Michael Rawlins <rawlin...@yahoo.com> wrote:
>On 01/12/12 Ben Root wrote:
>
>Just a quick suggestion for cleaning up your code, please look into the
argparse module to make command-line parsing so much easier to use.
>
>http://docs.python.org/dev/library/argparse.html
>
>
>Ben Root
>
>
>
>Command line parsing? I'm new to python and matplotlib and was given this
>code by a colleague. I've managed to make simple modifications. Don't know
>enough yet to use the examples in the link you provide.
>
>I've simplified my code as much as possible. The first 50 lines make a map.
>The code below that makes a 4 panel graphic. Seems that plt.figure invokes a
>new plot window. But plt.semilogy, plt.loglog, and plt.hist do not, keeping
>the panels in a single window. This is what I need. Trying now to figure out
>how to transfer the fig=plt.figure line into the subplot section, without
>popping up a new window.
>
>Mike
>
>
>
Ok, a quick crash course:
A "figure" can hold one or more "axes" (or subplots). When using "plt", you
can choose to make figures explicitly with the "fig = plt.figure()" command or
not. The same is true for axes objects. If you call a command that needs a
figure and/or an axes object to have been made and they don't exist, then they
are made for you automatically. Otherwise, the most recently accessed
figure/axes are assumed. This is why plt.hist(), plt.semilog() and others are
not creating a new figure window if one already existed.
Anyway, for your code, you do not want to bring in the plt.figure() call into
the subploting section. The example you were given takes advantage of pyplot's
implicit syntax (where it is implicitly assumed which axes/figure object you
are using). However, I personally do not like that approach, and instead
decided to show you an explicit style. I created a foobar() function that
takes a blank figure object and other parameters, creates the four subplot axes
and performs drawing on each of them. Note that the title is for the subplot,
not for the figure. If you want a title for the figure above all the other
subplots, use "fig.suptitle()". I then have a loop where a figure is created
each time, the foobar() function acts on that figure, saved and then cleared
before the next iteration.
Note, I noticed you had "plt.show()" commented out before the call to
"plt.savefig()". Usually, you will want savefig() to come *before* show()
because closing the figure window will destroy the figure object, resulting in
a blank figure to save if done afterwards.
I hope this is helpful!
Ben Root
OK starting to make sense. Yes very helpful. I think what's you've set up
might work, provided I can pass a filename for data into the function.
At the moment I'm getting an error:
NameError: name 'foobar' is not defined
for the line with: foobar(fig, m, title)
Mike
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