Adding plots to a pdf file

Question

My code reads all the text file in the folder, turns it into an array and plots a histogram of each data using a for cycle, pretty simple stuf, but I want to save all it returns, all the histograms into a single pdf file. I know the function:

plt.savefig('file.pdf')

works but since it's in a for cycle it will only save the last one, I mean it overwrites on it. Is there a function to add the other histograms or should I change the code?

Answer 1

You essentially have two options.

1. Create multiple pdf files, merge them afterwards

• Merge PDF files
• append page to existing pdf file using python

2. Write all plots directly to a single pdf file.

• Example from the matplotlib page: http://matplotlib.org/examples/pylab_examples/multipage_pdf.html

• Output a Document (preferably a PDF) from Python

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