Plotting ROOT objects with matplotlib¶

The following code block defines some useful methods to plot ROOT objects.

from mpl_tools import bind

For the detailed instructions refer to the matplotlib documentation and reference to relevant functions (plot, bar, etc).

TH1¶
`hist1.plot(...)`	plot TH1* using `pyplot.plot(x, y, ...)` function (x,y are overridden)
`hist1.plot(autolabel=True, ...)`	same as above, but guess label from histogram’s title
`hist1.errorbar(autolabel=True, ...)`	plot TH1* using `pyplot.errorbar(x, y, yerr, xerr, ...)`
`hist1.bar(autolabel=True, ...)`	plot TH1* using `pyplot.bar(x, y, yerr, xerr, ...)`
`hist1a.bar(divide=3, shift=0, ...)` `hist1b.bar(divide=3, shift=1, ...)` `hist1c.bar(divide=3, shift=2, ...)`	plot three TH1* using `pyplot.bar()`. The width of the bins will be times shorter and the bins will be displaced and not overlapped

autolabel may be applied to all above commands.

TH2¶
`hist2.pcolorfast(...)`	plot TH2* `ax.pcolorfast()` (fastest, each axis should have equal width bins)
`hist2.pcolorfast(colorbar=True,...)`	same as above, adds a colorbar
`hist2.pcolorfast(mask=0.0,...)`	same as the first command. Do not colorize bins with value=0.0 (ROOT behaviour)
`hist2.pcolormesh(...)`	plot TH2* `ax.pcolormesh()` (slower than pcolorfast)
`hist2.imshow(...)`	plot TH2* `ax.imshow()`

colorbar and mask options may be applied to all above commands.

TGraph¶
`graph.plot(...)`	plot `TGraph`/`TGraphErrors`/`TGraphAsymmErrors` via `plt.plot()`, no errors
`graph.errorbar(...)`	plot `TGraphErrors`/`TGraphAsymmErrors` via `plt.errorbar()`