Saving plots AxesSubPlot generated from python pandas with matplotlib s savefig

Question

I m using pandas to generate a plot from a dataframe  which I would like to save to a file   dtf   pd DataFrame from records d columns h  fig   plt figure   ax   dtf2 plot   ax   fig add subplot ax  fig savefig    Documents output png     It seems like the last line  using matplotlib s savefig  should do the trick   But that code produces the following error   Traceback  most recent call last     File    testgraph py   line 76  in  lt module gt      ax   fig add subplot ax    File   opt local Library Frameworks Python framework Versions 2 7 lib python2 7 site-packages matplotlib figure py   line 890  in add subplot     assert a get figure   is self  AssertionError   Alternatively  trying to call savefig directly on the plot also errors out   dtf2 plot   savefig    Documents output png       File    testgraph py   line 79  in  lt module gt      dtf2 plot   savefig    Documents output png   AttributeError   AxesSubplot  object has no attribute  savefig    I think I need to somehow add the subplot returned by plot   to a figure in order to use savefig   I also wonder if perhaps this has to do with the magic behind the AxesSubPlot class   EDIT    the following works  raising no error   but leaves me with a blank page image      fig   plt figure   dtf2 plot   fig savefig  output png     EDIT 2  The below code works fine as well  dtf2 plot   get figure   savefig  output png

User · Answer

So I m not entirely sure why this works  but it saves an image with my plot   dtf   pd DataFrame from records d columns h  dtf2 plot   fig   plt gcf   fig savefig  output png     I m guessing that the last snippet from my original post saved blank because the figure was never getting the axes generated by pandas   With the above code  the figure object is returned from some magic global state by the gcf   call  get current figure   which automagically bakes in axes plotted in the line above

User · Answer

this may be a simpler approach        DesiredFigure  get figure   savefig  figure name png     i e   dfcorr hist bins 50  get figure   savefig  correlation histogram png

User · Answer

It seems easy for me that use plt savefig   function after plot   function   import matplotlib pyplot as plt dtf   pd DataFrame from records d columns h  dtf plot   plt savefig    Documents output png

User · Answer

You can use ax figure savefig    as suggested in a comment on the question   import pandas as pd  df   pd DataFrame  0  1   ax   df plot line   ax figure savefig  demo-file pdf     This has no practical benefit over ax get figure   savefig   as suggested in other answers  so you can pick the option you find the most aesthetically pleasing  In fact  get figure   simply returns self figure     Source from snippet linked above def get figure self          Return the   Figure  instance the artist belongs to         return self figure

User · Answer

The gcf method is depricated in V 0 14  The below code works for me   plot   dtf plot   fig   plot get figure   fig savefig  output png

[python] Saving plots (AxesSubPlot) generated from python pandas with matplotlib's savefig

Examples related to python

Examples related to matplotlib

Examples related to pandas