Splunk ML Toolkit, Python, Custom Algorithm: How do I output a plot in a custom algorithm?

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For ex, in the supplied CorrelationMatrix example, can I plot the correlation values? Something like a 'corrplot' in R.

I am an R user and I am still learning Python. I believe I have to use 'matplotlib' for generating plots. Where do I write the plotting in writing the custom algorithm code.

Can I use a Python port of R's "ggplot" in Splunk. It would save a lot of time for me, If I can do this.

http://docs.splunk.com/Documentation/MLApp/3.1.0/API/Writeanalgorithmclass