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

Creating a Series

Series.cumSum

Last modified 8mo ago

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Append new Series to the end of a Series

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

Append an array to the end of Series