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Groupby.var

Obtain the variance per groups for a specified column

danfo.Groupby.var() [sourcearrow-up-right]

Parameters: None

Return: DataFrame

Examples

Obtain the variance of a column for each group, group by one column

const dfd = require("danfojs-node")


let data ={A: ['foo', 'bar', 'foo', 'bar',
                'foo', 'bar', 'foo', 'foo'],
           B: ['one', 'one', 'two', 'three',
                'two', 'two', 'one', 'three'],
           C: [1,3,2,4,5,2,6,7],
           D: [3,2,4,1,5,6,7,8]
}

let df = new dfd.DataFrame(data)

let grp = df.groupby(["A"])
grp.col(["C"]).var().print()

Obtain the var for two columns for each group, group by one column

Obtain the var for a column for each group, group by two columns

Obtain the var for two columns for each group, group by two columns

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