Add datashader plotting functions and example

[fanshi118]

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[fanshi118]

Does the code still throw those SettingWithCopyWarning warnings that appear in the example notebook? If so, we need to address those.

Also, that example still uses pickled data, which means that it's not immediately reproducible and the exact format of the data isn't clear. Instead, we could use a simple simulation to produce the data (e.g. a sin with Gaussian noise) and make the entire thing easily reproducible for anyone.

The simulated data is addressed in the updated notebook. Let me know if there's any adjustment needed.

I followed the df.loc approach as suggested in the warnings, but somehow it's still throwing those. When I tried running the same code w/in a notebook cell though, I wouldn't see those warnings. A bit unsure about what could've gone wrong.

[brandonwillard]

I followed the df.loc approach as suggested in the warnings, but somehow it's still throwing those. When I tried running the same code w/in a notebook cell though, I wouldn't see those warnings. A bit unsure about what could've gone wrong.

We need to make sure these warnings are gone.