Visualize single prediction

[mayer79]

I am unsure: do we already have a plot that shows SHAP decomposition for a single observation? Something like

• a waterfall plot: https://raw.githubusercontent.com/slundberg/shap/master/docs/artwork/boston_waterfall.png or
• a single observation force plot https://raw.githubusercontent.com/slundberg/shap/master/docs/artwork/boston_instance.png ?

If not: we might try to import such graphs from other R packages or write our own version(?)

[liuyanguu]

We kind of have the force plot using (shap.plot.force_plot) but there is no decomposition for a single observation. That sounds a good idea to me. :)

[mayer79]

The package "waterfalls" has minimal dependencies (ggplot2 and grDevices), so this is a good candidate for waterfall plots: (https://cran.r-project.org/web/packages/waterfalls/index.html)

Is it possible to modify shap.plot.force_plot to work for single observations? Or is it quite different from the one in Python (see figure above)?

[liuyanguu]

I kind of feel that we shall use a new function for it. The original shap.plot.force_plot was too complicated. Sounds very interesting I will further check the waterfalls package ...