series.fillna.md

description
Replace all NaN value with specified value

Series.fillNa

danfo.Series.fillNa(options)

Parameters	Type	Description	Default
value	Any	The value to replace all missing value with.
options	Object	inplace: Boolean indicating whether to perform the operation inplace or not. Defaults to false	{ inplace: false }

Examples

Fill nan value and then return new series

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

const dfd = require("danfojs-node")

let data1 = [NaN, 1, 2, 33, 4, NaN, 5, 6, 7, 8]
let sf = new dfd.Series(data1)

let sf_rep = sf.fillNa(-999)

sf_rep.print()

{% endtab %} {% endtabs %}

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

╔═══╤══════╗
║ 0 │ -999 ║
╟───┼──────╢
║ 1 │ 1    ║
╟───┼──────╢
║ 2 │ 2    ║
╟───┼──────╢
║ 3 │ 33   ║
╟───┼──────╢
║ 4 │ 4    ║
╟───┼──────╢
║ 5 │ -999 ║
╟───┼──────╢
║ 6 │ 5    ║
╟───┼──────╢
║ 7 │ 6    ║
╟───┼──────╢
║ 8 │ 7    ║
╟───┼──────╢
║ 9 │ 8    ║
╚═══╧══════╝

{% endtab %} {% endtabs %}

Fill nan value inplace

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

const dfd = require("danfojs-node")

let data1 = [NaN, 1, 2, 33, 4, undefined, 5, 6, 7, 8]
let sf = new dfd.Series(data1)
sf.fillNa(-999, { inplace: true })

sf.print()

{% endtab %} {% endtabs %}

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

╔═══╤══════╗
║ 0 │ -999 ║
╟───┼──────╢
║ 1 │ 1    ║
╟───┼──────╢
║ 2 │ 2    ║
╟───┼──────╢
║ 3 │ 33   ║
╟───┼──────╢
║ 4 │ 4    ║
╟───┼──────╢
║ 5 │ -999 ║
╟───┼──────╢
║ 6 │ 5    ║
╟───┼──────╢
║ 7 │ 6    ║
╟───┼──────╢
║ 8 │ 7    ║
╟───┼──────╢
║ 9 │ 8    ║
╚═══╧══════╝

{% endtab %} {% endtabs %}