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

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()

╔════╤═══╗
║ 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

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

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()

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

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Last updated 3 years ago

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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()

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

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()