Python Data Analysis Cookbook

Creating heatmaps

Heat maps visualize data in a matrix using a set of colors. Originally, heat maps were used to represent prices of financial assets, such as stocks. Bokeh is a Python package that can display heatmaps in an IPython notebook or produce a standalone HTML file.

Getting ready

I have Bokeh 0.9.1 via Anaconda. The Bokeh installation instructions are available at http://bokeh.pydata.org/en/latest/docs/installation.html (retrieved July 2015).

How to do it...

1. The imports are as follows:

   from collections import OrderedDict
   from dautil import data
   from dautil import ts
   from dautil import plotting
   import numpy as np
   import bokeh.plotting as bkh_plt
   from bokeh.models import HoverTool

2. The following function loads temperature data and groups it by ...