How to make function f(x)=-x periodic of (2*pi) explicitly?

Hi Folks,

I have a function f(x)=-x that starts from [-pi:pi] and I wanna repeat this function for a few periods of (2*pi) with the amplitude ranged between [pi to -pi].

I appreciate your response.

Answer 1

[Roger Stafford]

 f(x) = mod(-x+pi,2*pi)-pi;

[Mohammed Sayan]

Thanks,

but I want the lines f(x)=-x disconnected.

Is is possible?

[Roger Stafford]

Are you referring to doing a plot of this function? If you don't want a line connecting the points where a discontinuity occurs, you should use the '.' plotting option rather than '-'. Your plot will then be a series of dots. If you don't want dots, you will have to plot each 2*pi interval separately using the "hold on" instruction between the intervals.