用矩形窗，汉宁窗，三角窗，布拉克曼窗设计FIR低通数字滤波器 -With a rectangular window, Hanning window, triangle window, Blackman window FIR low-pass digital filter design

I am trying to representate a SPWM comparing a 30kHz triangle wave with a 60Hz sine wave using the MatLAB. However, I do not know how to compare two functions in him. Recently I generated this graph containg the sine and the triangle wave functions..