`dataFrame — union()`

Description

The union() method of the dataFrame object appends the rows of another DataFrame while automatically aligning columns by name.

Signature

dataFrame.union(values)

Scope: dataFrame
Family: core
Returns: mutates

Argument

values (dataFrame): The dataFrame or equivalent 2D array whose rows will be appended.

Example

// create a dataFrame
var rows1 = [
  ['B', 'C'],
  [3, 4]
];
var dataFrame = new DataFrame(rows1);

// append values to the dataFrame
var rows2 = [
  ['B', 'C'],
  [3, 4]
];
dataFrame.union(rows);

// log updated dataFrame
notebook.logTable(dataFrame)