# Categorical formula plot

Create a new categorical (bar, line, scatter) plot by computing a formula on overlapping categories of existing categorical plots. Numerics, from aggregations or parameters, can also be in the formula.

## Input type

Categorical chart, number

## Output type

Categorical chart, object selection

## Examples

In the example below, we add two bar plots together and multiply by the value of a numeric parameter. When writing formulas here, computation between bar plots will be run on matching segments and group-by categories. Single numerical values will be applied to all bars.

![Categorical formula plot example](../../../assets/cb09bd7f4685b6eb2baddb2401b0424a903fbb8b4cd48a9885d760acad680183.webp)

## Usage information

| Functionality | Availability |
| --- | --- |
| [Standard Quiver card](../core-concepts/index.md#cards) | Supported |
| [Transform table transform](../cards-transform-table/index.md) | Unsupported |