Matrix<T>.fromRows constructor
Matrix<T>.fromRows (
- DataType<
T> dataType, - List<
List< source, {T> > - MatrixFormat? format,
Constructs a matrix from a nested list of rows.
If format
is specified, source
is copied into a mutable matrix of the
selected format; otherwise a view onto the possibly mutable source
is
provided.
Implementation
factory Matrix.fromRows(DataType<T> dataType, List<List<T>> source,
{MatrixFormat? format}) {
final rowCount = source.length;
final columnCount = source.isEmpty ? 0 : source[0].length;
if (!source.every((row) => row.length == columnCount)) {
throw ArgumentError.value(
source, 'source', 'All rows must be equally sized.');
}
final result =
NestedRowMatrix.fromList(dataType, rowCount, columnCount, source);
return format == null ? result : result.toMatrix(format: format);
}