series.append.md

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

Series.append

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

{% tabs %} {% tab title="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()

{% endtab %} {% endtabs %}

{% tabs %} {% tab title="Output" %}

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

{% endtab %} {% endtabs %}

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

{% tabs %} {% tab title="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()

{% endtab %} {% endtabs %}

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

Append an array to the end of Series

{% tabs %} {% tab title="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()

{% endtab %}

{% tab title="Browser" %}

{% endtab %} {% endtabs %}

{% tabs %} {% tab title="Output" %}

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

{% endtab %} {% endtabs %}