add plot method

[rabutler-usbr]

this will create diagnostic plots for the disaggregation

• plot historical data as points
• plot options:
  • color of historical point
  • units
  • y-units
• months as month.abb
• title is sitename
• ...
• monthly pdf
• annual pdf
• add in other annual stats
• create different plots, use which. see plot.lm
• Add in show argument, so that if you don't want to enter through every site, you do not have to.
  • interactive mode
  • how to handle if not interactive
• return knnstplot object
• tests
• save_knnst_plot() see save knnstplot #14
• plot all/select sites see plot all/select sites #15
• annual stats can be computed on CY or WY see How are we treating WY vs CY #16

[rabutler-usbr]

see M:\Shared\CRSSinputProcessors\RPrograms\Disagg\code\plottingCode for existing code

[rabutler-usbr]

will need to add in the historical data to the knnst object, I think.

Otherwise, need to consider how to convert between intervening space and total space? That maybe is beyond the scope of this package?

[rabutler-usbr]

How do I capture all ... parameters and appropriately pass them to the ggplot functions?