DataFrame.ctypes

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.

danfo.DataFrame.dtypes
Examples
Returns auto-generated index of a DataFrame
Node
Browser
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()
​
Output
╔═══╤══════════════════════╗
║   │ 0                    ║
╟───┼──────────────────────╢
║ A │ float32              ║
╟───┼──────────────────────╢
║ B │ int32                ║
╟───┼──────────────────────╢
║ C │ int32                ║
╚═══╧══════════════════════╝
Columns with mixed types are represented as string.
Node
Browser
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()
​
Output
╔═══╤══════════════════════╗
║   │ 0                    ║
╟───┼──────────────────────╢
║ A │ float32              ║
╟───┼──────────────────────╢
║ B │ int32                ║
╟───┼──────────────────────╢
║ C │ int32                ║
╟───┼──────────────────────╢
║ D │ string               ║
╚═══╧══════════════════════╝
Note: To cast a type, use the asType method.

DataFrame.selectDtypes

DataFrame.index

Last modified 8mo ago

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