# Create New Calculation

Mutate creates new column(s) with given expressions and preserves existing column(s). To override existing column, you can select existing column on Mutate Dialog.

## How to Access This Feature

### From + (plus) Button

![](https://2850417076-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M4HLCK3olgduYoe3RVS%2Fsync%2F04c2dc75b12e108bb0bf7b8b3f778d4550139aad.png?generation=1610042263954960\&alt=media)

* Click "+" button and select "Mutate (Create Calculation)".

### From Column Menu

![](https://2850417076-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M4HLCK3olgduYoe3RVS%2Fsync%2Fa9df67cc0fa68209575adecc88bbfe2d6d2ce8d5.png?generation=1610042264513199\&alt=media)

* You can also select "Create Calculation (Mutate)" from column menu of the column which becomes the basis of the new calculation.

## Create New Column with New Calculation

![](https://2850417076-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M4HLCK3olgduYoe3RVS%2Fsync%2Fb62240d0788fd52b5a4c8966cade44f488a5b188.png?generation=1610042264038341\&alt=media)

1. Click the "Create New Column" radio button.
2. Type in the name of new column in "New Column Name" field.
3. Type in the R Calculation in "Calculation" field.
4. Click "Run" to run the calculation and create the new column.

## Overwrite Existing Column with New Calculation

![](https://2850417076-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M4HLCK3olgduYoe3RVS%2Fsync%2Fcded7f7b10e04eca518090caaf865ec302c83bbe.png?generation=1610042264870180\&alt=media)

1. Click the "Overwrite Existing Column" radio button.
2. Select the column to overwrite with the new calculation from "Column" list.
3. Type in the R Calculation in "Calculation" field.
4. Click "Run" to run the calculation and overwrite the values of the column.