lisa.analysis: Issue UserWarning for old version of matplotlib
Setting up a non-interactive plot fails will make it impossible to save the figure in old version of matplotlib, so warn and force interactive=True.
GitLab Maintenance scheduled for Thursday, 18th December 2025, from 7:00 AM to 10:00 AM BST. GitLab will be in read-only mode and experience short periods of complete downtime (up to 20 minutes) during this window.
Setting up a non-interactive plot fails will make it impossible to save the figure in old version of matplotlib, so warn and force interactive=True.