Add a plot function to the ModelFit class.
Handle situation with no matplotlib.
Add plot_with_residuals function to the ModelFit class. Various fixes.
Add plotting errorbars when weights are set.
Explicitely require one independent variable for plotting results.
Extract importing matplotlib to a separate function.
Split ModelFit plotting into plot_fit() and plot_results().
Add keyword arguments. Variuos improvements in plotting.
Add an example with plotting.
Update ModelFit docstrings.
Add axes and figure keyword arguments to plotting.
Add another example of plotting a fit.
Change default keyword arguments from {} to None in plotting funcs.
Change numpoints default from 200 to None.
Check if passed ax is instance of an axes object.
Add a fig argument to ModelFit.plot function.
Move importing matplotlib to the top of model.py.
Change *_kw to *_kws in plotting functions.
Edit docstrings of the plotting funcs to comply with numpy.
Fix printing the matplotlib import error message.