---
title: "init(column:)"
framework: createml
role: symbol
role_heading: Initializer
path: "createml/mldatacolumn/init(column:)-s8g5"
---

# init(column:)

Creates a new column of machine learning dictionaries from a given column whose elements can be converted to dictionaries.

## Declaration

```swift
init<T>(column: MLDataColumn<T>) where T : MLDataValueConvertible
```

## Parameters

- `column`: An doc://com.apple.createml/documentation/CreateML/MLDataColumn of elements convertible to doc://com.apple.createml/documentation/CreateML/MLDataValue/DictionaryType.

## Discussion

Discussion Use this initializer to create a column of dictionaries from another column. Start by creating a column that is convertible to a column of dictionaries. let intDictionaryString = "{1:\"one\", 2:\"two\", 3:\"three\"}" let intDictionaryString2 = "{4:\"four\", 5:\"five\", 6:\"six\"}" let stringsColumn = MLDataColumn([intDictionaryString, intDictionaryString2])

print(stringsColumn) // Prints ["{1:"one", 2:"two", 3:"three"}", "{4:"four", 5:"five", 6:"six"}"] Then use init(column:) to convert the column to a column of dictionaries. let dictionaryColumn = MLDataColumn<MLDataValue.DictionaryType>(column: stringsColumn) print(dictionaryColumn) // Prints [[1: one, 2: two, 3: three], [5: five, 4: four, 6: six]]

## See Also

### Creating a data column by converting another column

- [map(to:)](createml/mldatacolumn/map(to:).md)
- [init(column:)](createml/mldatacolumn/init(column:).md)
- [init(column:)](createml/mldatacolumn/init(column:)-5rg9u.md)
- [init(column:)](createml/mldatacolumn/init(column:)-2rxtu.md)
- [init(column:)](createml/mldatacolumn/init(column:)-86ge9.md)
- [init(column:)](createml/mldatacolumn/init(column:)-23pmx.md)
- [init(column:)](createml/mldatacolumn/init(column:)-ztkv.md)
- [init(column:)](createml/mldatacolumn/init(column:)-8uzuq.md)
- [init(column:)](createml/mldatacolumn/init(column:)-855l9.md)