I'm making many plots in a loop using the same Figure and Axes. The basic setup including a twin Axes is done once and the Axes are cleared at the end of the loop using cla(). Axes.cla() resets the ...

Using a date x-axis that are being autoscaled outside the initial data range due to the added vline then the first (and only the first) data label gets no rotation. That the dates are rotated as in ...