---
title: "summary(of:)"
framework: tabulardata
role: symbol
role_heading: Instance Method
path: "tabulardata/dataframe/slice/summary(of:)"
---

# summary(of:)

Generates a data frame that summarizes the columns you select by name.

## Declaration

```swift
func summary(of columnNames: String...) -> DataFrame
```

## Parameters

- `columnNames`: A comma-separated, or variadic, list of column names in the data frame slice.

## See Also

### Summarizing a Slice

- [summary()](tabulardata/dataframe/slice/summary().md)
- [summary(ofColumns:)](tabulardata/dataframe/slice/summary(ofcolumns:).md)
- [SummaryColumnIDs](tabulardata/summarycolumnids.md)