Heatmap Does Not Show

I am trying to plot a simple heatmap from a dataframe that looks like this: row column content amount 0 x a c1 1 2 x b c3 3 4 x c

Solution 1:

Your x and y coordindates are swapped, should be:

p.rect(x="column", y="row", ...)

As for the other message, it is self-explanatory: As of Bokeh 1.2, ColorBar can only be configured with continuous color mappers (e.g. LinearColorMapper). You can either:

• compute colors yourself in Python code, and include a column of colors in source, or
• re-cast your plot to use a LinearColorMapper (i.e. map content appropriately to some numerical scale)

Solution 2:

For your colorBar the solution is here, I quiet did not understand yet what happened to your source, I will dig a bit deeper another time. The colorBar expected a continuous mapper you gave it a categorical.

from bokeh.models import (CategoricalColorMapper, LinearColorMapper, 
BasicTicker, PrintfTickFormatter, ColorBar, ColumnDataSource, 
LinearColorMapper)


factors =df['content'].unique().tolist()
colors = all_palettes['Viridis'][max(len(factors), 3)]
mapper = LinearColorMapper(palette=colors)