Data analysis using Python (ix) Pandas summary statistics and calculations

Source: Internet
Author: User

The Pandas object has some common mathematical and statistical methods. For example, the sum () method, which makes the column subtotal: the sum () method passed in Axis=1 is specified as a horizontal summary, which is subtotal: Idxmax () gets the index of the maximum value: There is also a rollup that is cumulative, cumsum (), compared to it and Su The difference between M ():
The unique () method is used to return only values in the data: the Value_counts () method is used to count how often each value appears: the Isin () method is used to determine membership:

The installation steps have been written in the first essay, not here. Data analysis using Python (i) Brief introduction
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Data analysis using Python (ix) Pandas summary statistics and calculations

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