Enhance plotting capabilities

[forman]

Expected behavior

Add to various plot_xxx operations

• multiple variables per plot;
• different line and point styles and colors;
• allow plotting time series extracted from datasets (e.g. via. tseries_point);
• allow plotting series of data frames.

Actual behavior

Only one variable per plot, styles only via generic properties parameter which is a mostly undocumented dictionary of keyword arguments to matplotlib.

Specifications

Cate 1.0 ... 2.0.dev15

[Evadzi]

@forman @hans-permana
Is it possible to import the pearson_correlation_scalar operator to be part of this new operator; with the possibility of displaying the correlation values with the plot?

[forman]

Import?

[Evadzi]

@forman, @hans-permana , yes!
If this new operator provides the option to plot multiply time series for 2 or more different variables for different datasets (with the timeseries data merged into one dataset or not) e.g. sea-level and sst for an X,Y location, then an option to compute and display the correlation value together with the multiple timeseries plot will be good.

[hans-permana]

I suggest @Evadzi to create a new issue because it is beyond the scope of this isuse.

[hans-permana]

Close via commit c678741