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1. Solved by adding cast with tf.cast(predictions, tf.float64) at the point of
problem case.
2. Completed make_dataset() of automobile_data.py for the transforming of
DataFrame to Dataset, the standard one we know of official site.
3. Added from_dataset() in automobile_data.py for re-use by others sites in
cookbook/regression.

This commit changes a tiny typo in the Eager Execution notebook.

* "Machine Learning" --> Machine learning.
* "steepest the ascent" --> "steepest ascent"
* "standard gradient descent" --> "stochastic gradient descent"

Seems like it was changed accidentally as it is different than any of the other files.

set `/examples` as the working directory

There is no `data` directory, these instructions work without this line.

Added correct link to blogpost
Changed Sentosa to Setosa in a couple of places