Groupby.max
Obtain the maximum value of columns per groups
danfo.Groupby.max() [source]
Parameters: None
Returns: DataFrame
Example
Obtain the maximum value for 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"]).max().print()Obtain the maximum value for two columns for each group, group by one column
Obtain the maximum value for a column for each group, group by two columns
Obtain the maximum value for two columns for each group, group by two columns
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