add thread and ternary plots

[loriab]

Description

DON'T MERGE as this is only rewrites of matplotlib routines that function on data. Presently no integration with QCA.

Todos

• [x] plotly threads plot
• [x] plotly ternary plot
• [ ] plotly threads plot of qcf data
• [ ] plotly ternary plot of qcf data
• [ ] find a decent RGB colormap in plotly -- their "Jet" is very dark so that red/blue are hard to distinguish

Questions

• [ ] Using the plotly built-in ternary would be nice, but I don't see plotting two at once or turning one upside down. If anyone sees a better path, let me know.

Status

• [ ] Changelog updated
• [ ] Ready to go

[lgtm-com[bot]]

This pull request introduces 3 alerts when merging 7f5a94b59c5e6a73ffba6a3eec0a40575b4b6c3d into 7f5585d446276db10f4b5cbb0ba8e8c24192da93 - view on LGTM.com

new alerts:

• 3 for Unused local variable

[dgasmith]

Cool! This looks great.

I agree that we need to hand code the ternaries from Plotly basics rather than their built in function.

You may want to turn off the grid lines, like so..

[loriab]

turn off the blue bkgd + white grid lines for both ternary and threads or just the former?

[dgasmith]

For ternary for sure. For the threads you may want to consider shifting the chart +/- 0.5 to have the grid correctly line up, may with a view.