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# init(doubles:)

Creates a new column of doubles by converting the elements of another
column.

```
init(doubles: MLUntypedColumn)
```

## Parameters

`doubles`

A column with elements that are convertible to doubles.

## Return Value

A new untyped column of doubles; otherwise an invalid column
if any element of the given column cannot be converted to
<doc://com.apple.documentation/documentation/Swift/Double>.

## Discussion

Use this initializer to create a column of doubles from another column.
As an example, to create a column with this initializer, first start
with a column that is convertible to doubles.

```swift
let stringColumn = MLUntypedColumn(["1.0", "2.0", "3.0", "4.0", "5.0"])
print(stringColumn)
/* Prints...
 ValueType: String
 Values:        [1.0, 2.0, 3.0, 4.0, 5.0]
 */
```

Then use [`init(doubles:)`](/documentation/CreateML/MLUntypedColumn/init(doubles:)) to convert the column to a
column of doubles.

```swift
let doublesColumn = MLUntypedColumn(doubles: stringColumn)
print(doublesColumn)
/* Prints...
 ValueType: Double
 Values:        [1.0, 2.0, 3.0, 4.0, 5.0]
 */
```

---

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