matplotlib, savefig: DPI setting is ignored
dpi, matplotlib, python, show
Solution
PDF saving uses the DPI setting for image resolution inside the PDF, not for any line/polygon resolution (which is meaningless in a vector format).
If your happy with the output on screen, and don't need to have a scalable graphic, saving as `png` is probably fine.
Problem
I cannot find anyone else with this problem. In matplotlib, you can view your plots using either show() or savefig(). These generate slightly different images; in my case, the savefig() image is uglier and harder to understand. I need to make life easy for my examinator, so.. I found some topics that suggested I set the DPI size to match that of show(). I have tried: -> Setting savefig.dpi directly with matplotlib.rcParams['savefig.dpi'] = 80. -> Setting savefig.dpi directly in ~/.matplotlib/matplotlibrc. -> Moving my rc file to CWD. -> Finally, using savefig('image.pdf', dpi=80) I can verify that the attribute is indeed getting set; but it seems that the setting is igored by savefig(). Can anyone help with this? (Simplified) code: ``` plt.bar(ind, functimes, yerr=stddev, bottom=0, width=barWidth, align='center', color='b') ax = plt.gca() ax.legend(barRcts, barLegend) plt.title("Function Call Overhead") plt.xlabel("Function ID") plt.ylabel("Execution Time [us]") plt.xticks(ind, funcNames) figtest.autofmt_xdate() plt.savefig(out_file, dpi=80, format='pdf') ```