sawtooth 函数 2 ~; o6 S# I" Z" c, ]4 Y* r " h( R0 p1 Y* [/ H. Gx = sawtooth(t) generates a sawtooth wave with period 2π for the elements of the time array t. sawtooth is similar to the sine function but creates a sawtooth wave with peaks of –1 and 1. The sawtooth wave is defined to be –1 at multiples of 2π and to increase linearly with time with a slope of 1/π at all other times. ; r, o# G8 _5 z- R# O' [ " v. g" O. @6 o( a5 y" M2 u