How to grab matplotlib plot as html in ipython notebook?

Question

I have an IPython Notebook that is using Pandas to back-test a rule-based trading system.

I have a function that accepts various scalars and functions as parameters and outputs a stats pack as some tables and a couple of plots.

For automation, I want to be able to format this nicely into a "page" and then call the function in a loop while varying the inputs and have it output a number of pages for comparison, all from a single notebook cell.

The approach I am taking is to create IpyTables and then call _repr_html_(), building up the HTML output along the way so that I can eventually return it from the function that runs the loop.

How can I capture the output of the plots this way - matplotlib subplot objects don't seem to implement _repr_html_()?

Feel free to suggest another approach entirely that you think might equally solve the problem.

TIA

Is the output of this cell a series of static HTML files? Does it matter whether the figures also appear inside the notebook (i.e., default pylab=inline behavior)? — Garrett
– Garrett, Commented Jan 29, 2013 at 14:51
ideally, it would all appear inline in the notebook. from there, export to html if desired using nbviewer or whatever. I spoke to someone offline who just suggested saving the images as PNGs locally and then constructing the HTML <img src=".." /> tags by hand. Would work I guess - seems a little hacky tho. — ultra909
– ultra909, Commented Jan 29, 2013 at 16:01
Ok, if you go that route, this answer stackoverflow.com/a/5314808/243434 on how to capture matplotlib figures as inline PNGs may help — Garrett
– Garrett, Commented Jan 29, 2013 at 16:08
There's a slightly more direct way than saving them - encode them in base64, and use data URIs to embed them directly in your HTML. That's how IPython displays images in results anyway. — Thomas K
– Thomas K, Commented Jan 29, 2013 at 17:30
To prevent duplication of plots, try running with pylab disabled (double-check your config files and the command line). — Garrett
– Garrett, Commented Jan 30, 2013 at 4:39

ultra909 · Accepted Answer · 2013-01-30 09:37:19Z

1

Ok, if you go that route, this answer stackoverflow.com/a/5314808/243434 on how to capture >matplotlib figures as inline PNGs may help – @crewbum

To prevent duplication of plots, try running with pylab disabled (double-check your config >files and the command line). – @crewbum

--> this last requires a restart of the notebook: ipython notebook --pylab (NB no inline)

answered Jan 30, 2013 at 9:37

ultra909

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ultra909 Over a year ago

N.B. I still get popups, but just close these automatically once I have the generated HTML, using: plt.close()

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