danfo.concat
Concatenate DataFrames and Series along an axis
danfo.concat(options)
Parameters
Type
Description
Default
options
Object
{
dfList: List of DataFrames or Series to concatenate together.
axis: One of 0 or 1. The axis on which to perform concatenation. Specified axis must align in both Objects
}
{axis: 1}
Examples
Concatenate two DataFrames along column axis (1)
const dfd = require("danfojs-node")
let data = [['K0', 'k0', 'A0', 'B0'], ['k0', 'K1', 'A1', 'B1'],
['K1', 'K0', 'A2', 'B2'], ['K2', 'K2', 'A3', 'B3']]
let data2 = [['K0', 'k0', 'C0', 'D0'], ['K1', 'K0', 'C1', 'D1'],
['K1', 'K0', 'C2', 'D2'], ['K2', 'K0', 'C3', 'D3']]
let colum1 = ['Key1', 'Key2', 'A', 'B']
let colum2 = ['Key1', 'Key2', 'A', 'D']
let df1 = new dfd.DataFrame(data, { columns: colum1 })
let df2 = new dfd.DataFrame(data2, { columns: colum2 })
let com_df = dfd.concat({ dfList: [df1, df2], axis: 1 })
com_df.print()Concatenate two DataFrames along row axis (0)
Concatenate two Series along row axis (0)
See also danfo.merge for joining objects based SQL-like joins.
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