When I run the script below, the range tuple is [0.0, 1.0,
> 0.0, 1.0]
> but the data has an actual range more like [ 0, 6.8, 0,
> 1], the plot looks correct, which is good, but the range
> tuple is wrong. It seems to work fine with simple data
> examples but breaks with this data..
> This is with Matplotlib v0.54.2
It works under 0.63 - it prints
[0.0, 1.0, 1.0, 7.0]
JDH