triangleWave function

dynamic triangleWave(dynamic x)

Triangle wave function

The triangle wave function generates a periodic waveform that oscillates in a triangle shape.

Example:

print(triangleWave(2.7));  // Output: -0.8
print(triangleWave(3.2));  // Output: 0.8

The output for 2.7 is -0.8 and for 0.8 is -0.6 because the triangle wave function oscillates in a triangle shape.

Example 2:

print(triangleWave(Matrix.identity(2))); // Output: [[1.0, 0.0], [0.0, 1.0]]

Implementation

dynamic triangleWave(dynamic x) {
  if (x is num) {
    x %= 1;
    if (x < 0.25) {
      return 4 * x;
    } else if (x < 0.75) {
      return -4 * x + 2;
    } else {
      return 4 * x - 4;
    }
  } else if (x is Complex) {
    return triangleWave(x.real);
  } else if (x is Matrix) {
    return MatrixFunctions(x).triangleWave();
  } else {
    throw ArgumentError('Input should be either num or Complex');
  }
}