Series.apply

Invoke a function on each value in a Series.

danfo.series.apply(callable, options)

Parameters	Type	Description	Default
callable	Function	Function (can be anonymous) to apply
options	Object	inplace: Boolean indicating whether to perform the operation inplace or not. Defaults to false	{ inplace: false }

Returns:

**** return Series

---

Example

Node

const dfd = require("danfojs-node")

let sf = new dfd.Series([1, 2, 3, 4, 5, 6, 7, 8])

let apply_func = (x) => {
    return x + x
}
sf.apply(apply_func).print()

Browser

Output

╔═══╤════╗
║ 0 │ 2  ║
╟───┼────╢
║ 1 │ 4  ║
╟───┼────╢
║ 2 │ 6  ║
╟───┼────╢
║ 3 │ 8  ║
╟───┼────╢
║ 4 │ 10 ║
╟───┼────╢
║ 5 │ 12 ║
╟───┼────╢
║ 6 │ 14 ║
╟───┼────╢
║ 7 │ 16 ║
╚═══╧════╝

Node

const dfd = require("danfojs-node")

let sf = new dfd.Series([1, 2, 3, 4, 5, 6, 7, 8])

sf.apply(Math.log).print()

Browser

Output

╔═══╤════════════════════╗
║ 0 │ 0                  ║
╟───┼────────────────────╢
║ 1 │ 0.6931471805599453 ║
╟───┼────────────────────╢
║ 2 │ 1.0986122886681096 ║
╟───┼────────────────────╢
║ 3 │ 1.3862943611198906 ║
╟───┼────────────────────╢
║ 4 │ 1.6094379124341003 ║
╟───┼────────────────────╢
║ 5 │ 1.791759469228055  ║
╟───┼────────────────────╢
║ 6 │ 1.9459101490553132 ║
╟───┼────────────────────╢
║ 7 │ 2.0794415416798357 ║
╚═══╧════════════════════╝

Node

const dfd = require("danfojs-node")

let sf = new dfd.Series(["Rice","Beans","Yam","Banana","Wheat"])

sf.apply((x)=>{
    return x.toLocaleLowerCase()
}).print()

Browser

Output

╔═══╤════════╗
║ 0 │ rice   ║
╟───┼────────╢
║ 1 │ beans  ║
╟───┼────────╢
║ 2 │ yam    ║
╟───┼────────╢
║ 3 │ banana ║
╟───┼────────╢
║ 4 │ wheat  ║
╚═══╧════════╝