PR summary

• This PR is to address[Bug]: Missing axes limits auto-scaling support for LineCollection #29219, which addresses the missing auto-scaling support for LineCollection objects.
• The lack of this feature requires users to manually call ax.autoscale() when adding a LineCollection to an Axes.
• The PR adds the autoscale inside Axes.add_collection() function to ensure that the scaling is done automatically, without having to call ax.autoscale()

With the change, the following code:

from matplotlib.collections import LineCollectionlc = LineCollection([[(x, x ** 2) for x in range(5)]])ax = plt.gca()ax.add_collection(lc)plt.show()

Successfully creates:

PR checklist

• "closes #0000" is in the body of the PR description tohttps://github.com/matplotlib/matplotlib/issues/29219
• new and changed code istested
• Plotting related features are demonstrated in anexample
• New Features andAPI Changes are noted with adirective and release note
• Documentation complies withgeneral anddocstring guidelines