operator[]() [1/2]

unspecified_column_type operator[]

(

size_type

iColumn

)

Returns a matrix column reference by the specified column index.

Parameters

iColumn

is an index of a column to be retrieved. The valid range of values for the index starts from zero and ends with Columns() - 1. Correctness of the value is not validated.

Returns

Returns a reference to the addressed matrix column of an unspecified type which implements immutable vector semantics.

The returned column object refers to actual elements within the matrix. The column can be viewed as an immutable SequenceContainer (although its elements are mutable).