vl_filter

Add FilterTransform to a vega-lite spec.

Usage

vl_filter(spec, filter = NULL, .object = NULL)

Arguments

spec

An input vega-lite spec

filter

The filter property must be a predication definition, which can take one of the following forms:

1. an expression string, where datum can be used to refer to the current data object. For example, {filter: "datum.b2 > 60"} would make the output data includes only items that have values in the field b2 over 60.

2. one of the field predicates: equal, lt, lte, gt, gte, range, oneOf, or valid,

3. a selection predicate, which define the names of a selection that the data point should belong to (or a logical composition of selections).

4. a logical composition of (1), (2), or (3).

.object

Directly input an object, rather than creating one via the other arguments. Should not be used in conjunction with the other arguments other than spec. Objects can be of type: FilterTransform

Value

A modified Vega-Lite Spec