Overlapping "Reference" and "Predicted" histograms.

Some days ago reading the post:"Overlapping Histogram in R" , I thought that it could be a good idea to add this type of overlapping histograms plots to the monitor function, to see in this case the reference values histogram with the predicted values histogram overlapped.

In a perfect case we will see all the bars in a purple color, if not we will see the red (reference) and blue (predicted) colors, indicating the areas where the model is performing worse.

Monitor function is continuously updating, I have some future plans for process monitoring, and other tasks.