[projection](https://github.com/vega/vega/blob/master/packages/vega-projection/) instance with the given*name*. The return value is a*live* instance used by the underlying dataflow. Callers should take care not to modify the returned instance!

<aname="view_data"href="#view_data">#</a>

view.<b>data</b>(<i>name</i>)

view.<b>data</b>(<i>name</i>[, <i>values</i>])

[<>](https://github.com/vega/vega/blob/master/packages/vega-view/src/data.js"Source")

Returns the data set with the given*name*. The returned array of data objects is a*live* array used by the underlying dataflow. Callers that wish to modify the returned array should first make a defensive copy, for example using`view.data('name').slice()`.

If only one argument is provided, returns the data set with the given*name*. The returned array of data objects is a*live* array used by the underlying dataflow. Callers that wish to modify the returned array should first make a defensive copy, for example using`view.data('name').slice()`.

If two arguments are provided, removes the current data and inserts the provied input*values*, which can be either a single data object or an array of data objects. This call is equivalent to:

view.change(vega.changeset().remove(vega.truthy).insert(values));

Data updates do not force an immediate update to the view: invoke the[runAsync](#view_runAsync) method when ready. Note also that a single argument (getter) call returns the*output* of the data transform pipeline, whereas the two argument (setter) call sets the*input* to the transform pipeline.

<aname="view_addDataListener"href="#view_addDataListener">#</a>

view.<b>addDataListener</b>(<i>name</i>, <i>handler</i>)