toCSV method

Future<String> toCSV({ String delimiter = ',', String? outputFilePath, })

Converts the Matrix to a CSV string and optionally saves it to a file.

This method converts the Matrix object to a CSV string, using the specified delimiter. If an output file path is provided, the CSV string will be saved to that file.

delimiter: The delimiter to use in the CSV string (default: ','). outputFilePath: The output file path to save the CSV string (optional).

Example:

Matrix matrix = Matrix.fromList([
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
]);
String csv = matrix.toCSV(outputFilePath: 'output.csv');
print(csv);

Output:

1.0,2.0,3.0
4.0,5.0,6.0
7.0,8.0,9.0

Implementation

Future<String> toCSV({String delimiter = ',', String? outputFilePath}) async {
  String csv =
      map((row) => row.map((value) => value.toString()).join(delimiter))
          .toList()
          .join('\n');

  if (outputFilePath != null) {
    // Save file
    fileIO.saveToFile(outputFilePath, csv);
  }

  return csv;
}