triangleWave( time, amplitude, waveL, phaseShift)

Generate triangle waves at any time amplitude wavelength and phase shifts

A function to generate triangle waves over an array of time samples, used for example in sinusoidal PWM.
Fulfills some additional desireable traits over the original inspiration: mathworks.com/matlabcentral/fileexchange/46987-generation-of-triangle-wave
This allows you to change the amplitude, wavelength and phase shift.