Pandas Vectorized Methods - Intro to Data Science

This Udacity data vectorization video shows that Dataframe.apply(Numpy.mean) can be used to calculate column mean. Pandas allow easy vectorization of data charts. DataFrame['col_name'].map(lambda x: x==0) check each data cell in the column if it is equal to zero. DataFrame.applymap(lambda x: x ==0) will check each data cell in the entire dataframe.

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Vector math is not only optimized, speed wise, it's also clean and elegant.