Note
Go to the endto download the full example code.
Legend using pre-defined labels#
Defining legend labels with plots.
importmatplotlib.pyplotaspltimportnumpyasnp# Make some fake data.a=b=np.arange(0,3,.02)c=np.exp(a)d=c[::-1]# Create plots with pre-defined labels.fig,ax=plt.subplots()ax.plot(a,c,'k--',label='Model length')ax.plot(a,d,'k:',label='Data length')ax.plot(a,c+d,'k',label='Total message length')legend=ax.legend(loc='upper center',shadow=True,fontsize='x-large')# Put a nicer background color on the legend.legend.get_frame().set_facecolor('C0')plt.show()

References
The use of the following functions, methods, classes and modules is shownin this example:
See also
TheLegend guide contains an in depth discussion on the configurationoptions for legends.