dataframe.dtypes.md

description
Return the inferred column types in the DataFrame. This returns a Series with the data type of each column. The result’s index is the original DataFrame’s columns.

DataFrame.ctypes

danfo.DataFrame.dtypes

Examples

Returns auto-generated index of a DataFrame

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

const dfd = require("danfojs-node")

let data = {"A": [-20.1, 30, 47.3, -20],
            "B": [34, -4, 5, 6], 
            "C": [20, -20, 30, -40]}

let df = new dfd.DataFrame(data)

df.ctypes.print()

{% endtab %}

{% tab title="Browser" %}

{% endtab %} {% endtabs %}

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

╔═══╤══════════════════════╗
║   │ 0                    ║
╟───┼──────────────────────╢
║ A │ float32              ║
╟───┼──────────────────────╢
║ B │ int32                ║
╟───┼──────────────────────╢
║ C │ int32                ║
╚═══╧══════════════════════╝

{% endtab %} {% endtabs %}

Columns with mixed types are represented as string.

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

const dfd = require("danfojs-node")

let data = {"A": [-20.1, 30, 47.3, -20],
            "B": [34, -4, 5, 6], 
            "C": [20, -20, 30, -40],
            "D": ["a", "b", 20, 2.5]}
            
let df = new dfd.DataFrame(data)

df.ctypes.print()

{% endtab %}

{% tab title="Browser" %}

{% endtab %} {% endtabs %}

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

╔═══╤══════════════════════╗
║   │ 0                    ║
╟───┼──────────────────────╢
║ A │ float32              ║
╟───┼──────────────────────╢
║ B │ int32                ║
╟───┼──────────────────────╢
║ C │ int32                ║
╟───┼──────────────────────╢
║ D │ string               ║
╚═══╧══════════════════════╝

{% endtab %} {% endtabs %}

Note: To cast a type, use the asType method.