Series.append

Add a new value or values to the end of a Series.

danfo.Series.append(newValue, index, options)

Parameters	Type	Description	Default
newValue	Array, Series	Object to append
index	Array	The new index value(s) to append to the Series. Must contain the same number of values as newValues as they map 1 - 1.
options	Object	{ inplace: Whether to perform operation in-place or not. }	false

Append new Series to the end of a Series

Node

const dfd = require("danfojs-node")

let sf1 = new dfd.Series([1, 2, 3, 4], { index: ['f1', 'f2', 'f3', 'f4'] })
let sf2 = new dfd.Series(["a", "b", "c"])

new_sf = sf1.append(sf2, ["f5", "f6", "f7"])
new_sf.print()

Output

╔════╤═══╗
║ f1 │ 1 ║
╟────┼───╢
║ f2 │ 2 ║
╟────┼───╢
║ f3 │ 3 ║
╟────┼───╢
║ f4 │ 4 ║
╟────┼───╢
║ f5 │ a ║
╟────┼───╢
║ f6 │ b ║
╟────┼───╢
║ f7 │ c ║
╚════╧═══╝

Append new Series to the end of a Series in-place

Node

const dfd = require("danfojs-node")

let sf1 = new dfd.Series([1, 2, 3, 4], { index: ['f1', 'f2', 'f3', 'f4'] })
let sf2 = new dfd.Series(["a", "b", "c"])
let newIndex = ["f5", "f6", "f7"]

sf1.append(sf2, newIndex, { inplace: true })
sf1.print()

╔════╤═══╗
║ f1 │ 1 ║
╟────┼───╢
║ f2 │ 2 ║
╟────┼───╢
║ f3 │ 3 ║
╟────┼───╢
║ f4 │ 4 ║
╟────┼───╢
║ f5 │ a ║
╟────┼───╢
║ f6 │ b ║
╟────┼───╢
║ f7 │ c ║
╚════╧═══╝

Append an array to the end of Series

Node

let sf1 = new dfd.Series([1, 2, 3, 4], { index: ['f1', 'f2', 'f3', 'f4'] })
let sfArr = ["a", "b", "c"]

new_sf = sf1.append(sfArr, ["f5", "f6", "f7"])
new_sf.print()

Browser

Output

╔════╤═══╗
║ f1 │ 1 ║
╟────┼───╢
║ f2 │ 2 ║
╟────┼───╢
║ f3 │ 3 ║
╟────┼───╢
║ f4 │ 4 ║
╟────┼───╢
║ f5 │ a ║
╟────┼───╢
║ f6 │ b ║
╟────┼───╢
║ f7 │ c ║
╚════╧═══╝