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
Browser
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()
Output
╔═══╤════╗
║ 0 │ 2 ║
╟───┼────╢
║ 1 │ 4 ║
╟───┼────╢
║ 2 │ 6 ║
╟───┼────╢
║ 3 │ 8 ║
╟───┼────╢
║ 4 │ 10 ║
╟───┼────╢
║ 5 │ 12 ║
╟───┼────╢
║ 6 │ 14 ║
╟───┼────╢
║ 7 │ 16 ║
╚═══╧════╝
Node
Browser
const dfd = require("danfojs-node")
let sf = new dfd.Series([1, 2, 3, 4, 5, 6, 7, 8])
sf.apply(Math.log).print()
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
Browser
const dfd = require("danfojs-node")
let sf = new dfd.Series(["Rice","Beans","Yam","Banana","Wheat"])
sf.apply((x)=>{
return x.toLocaleLowerCase()
}).print()
Output
╔═══╤════════╗
║ 0 │ rice ║
╟───┼────────╢
║ 1 │ beans ║
╟───┼────────╢
║ 2 │ yam ║
╟───┼────────╢
║ 3 │ banana ║
╟───┼────────╢
║ 4 │ wheat ║
╚═══╧════════╝
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