Dataset Methods

Dataset comes with methods which allows you to manipulate your data.

get

Signature: get(index: number): NArray

Returns row as NArray for the specified index.

You can use negative indexing here.

slice

Signature: slice(...selection: Array[]): Dataset

Use this to slice a Dataset vertically(column-wise).

length

Use this property to get the number of rows in your Dataset.

import toynn from 'toynn';

const obj = [new toynn.NArray([1, 2, 3, 4])];

const myDataset = new toynn.Dataset(obj);
console.log(myDataset.length); // => 1

toArray

Signature: toArray(): NArray[]

Converts Dataset to Array of NArrays

onGet

Signature: onGet(element: NArray): NArray

Overwrite this function to add custom logic to process single row.

Make sure that your function is following the Signature while overwritting it.