Trajectory results report plots now plot vector variables, respect the x_name argument, and avoid noisy plots when values are nearly constant.

[robfalck]

Summary

The bokeh traj results report created by run_problem was not respecting plot_kwargs. This is now fixed, allowing users to specify the name of the time-like variable when phases rename the time-like variable.

Vectorized states, controls, and parameters were previously not being plotted correctly in the traj results report.

For example, in the brachistochrone vector states test, pos is a 2-vector holding both x and y states.
Previously, these weren't plotted correctly because Bokeh's ColumnDataSource seems to prefer a single column of data for each variable name.

Now the report will include a new figure for each element in the vector, with the axis labeled correctly.

Finally, in some cases, machine precision variation in otherwise-constant data would show up as noisy.
The y-range of the plots has now had its min_interval set to 1.0E-12 so that. machine-precision variation, typically on the order of 1E-16, appears constant.

Related Issues

• Resolves Timeseries report should display each element of vectorized states/controls/parameters separately. #999
• Resolves Bokeh Timeseries Plots fail if the time variable is renamed. #1051

Backwards incompatibilities

None

New Dependencies

None

[coveralls]

coverage: 93.605% (-0.2%) from 93.802%
when pulling 3f6e85b on robfalck:timeseries_fixes
into d324563 on OpenMDAO:master.