Generic Initializer

init(column:)

Creates a new column of arrays of doubles from a given column whose elements can be converted to an array of doubles.

Declaration

init<T>(column: MLDataColumn<T>) where T : MLDataValueConvertible
Available when Element is [Double].

Parameters

column

An MLDataColumn of elements convertible to an Array of Double.

Discussion

Use this initializer to create a column of arrays of doubles from another column. Start by creating a column that is convertible to a column of arrays of doubles.

let doubleArrayString = "[1.0, 2.0, 3.0]"
let doubleArrayString2 = "[4.0, 5.0, 6.0]"
let stringsColumn = MLDataColumn([doubleArrayString, doubleArrayString2])
print(stringsColumn)
// Prints ["[1.0, 2.0, 3.0]", "[4.0, 5.0, 6.0]"]

Then use init(column:) to convert the column to a column of arrays of doubles.

let doubleArrayColumn = MLDataColumn<[Double]>(column: stringsColumn)
print(doubleArrayColumn)
// Prints [[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]]

See Also

Creating a Data Column by Converting Another Column

func map<T>(to: T.Type) -> MLDataColumn<T>

Creates a new column by converting this column to the given type.

init<T>(column: MLDataColumn<T>)

Creates a new column of integers from a given column whose elements can be converted to integers.

init<T>(column: MLDataColumn<T>)

Creates a new column of arrays of integers from a given column whose elements can be converted to an array of integers.

init<T>(column: MLDataColumn<T>)

Creates a new column of doubles from a given column whose elements can be converted to doubles.

init<T>(column: MLDataColumn<T>)

Creates a new column of strings from a given column whose elements can be converted to strings.

init<T>(column: MLDataColumn<T>)

Creates a new column of arrays of strings from a given column whose elements can be converted to an array of strings.

init<T>(column: MLDataColumn<T>)

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

init<T>(column: MLDataColumn<T>)

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