How to use Pct_change in pandas

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Pct_change

Pct_change is a statistical function that represents the percentage difference between the current element and the previous element. The interval between the two elements can be adjusted.

For example, given three elements [2, 3, 6], calculate the percentage difference and get [NaN, 0.5, 1.0], increasing by 50% from the first element to the second element and by 100% from the second element to the third element.

Usage:

DataFrame.pct_change(periods=1, fill_method=‘pad’, limit=None, freq=None, **kwargs)

Parameter function:

periods: interval interval, i.e. step size

fill_method: method of handling null values

Calculate the growth rate for the value_1 column of df:

df.value_1.pct_change()

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