[pandas] .rolling .diff .cumsum - vectorization methods

useful vectorization methods for pandas.DataFrame

.diff

Calculates the difference of a DataFrame element compared with another element in the DataFrame (default is element in previous row).

pd.DataFrame.diff(periods=1, axis=0)
.rolling

Provide rolling window calculations.
window and min_periods are common tunning parameters

DataFrame.rolling(window, min_periods=None, center=False, win_type=None, on=None, axis=0, closed=None, step=None, method='single')
.cumsum

Return cumulative sum over a DataFrame or Series axis.
Returns a DataFrame or Series of the same size containing the cumulative sum.

DataFrame.cumsum(axis=None, skipna=True, *args, **kwargs
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