How to plot something like this??

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Daniel Schilling 2018-11-5

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https://ww2.mathworks.cn/matlabcentral/answers/427970-how-to-plot-something-like-this

评论： madhan ravi 2018-11-5

 x = 0.6*(u(t+2)-(cos(pi*t)+1)*(u(t+1)-u(t-1))-u(t-2))
 t = -5:51:5
 plot(x,t)

When running this i get that u is an undefined variable. U in this case is a shifted step function however which is bounding my cos function. What am I missing here?

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Answer 1

madhan ravi 2018-11-5

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https://ww2.mathworks.cn/matlabcentral/answers/427970-how-to-plot-something-like-this#answer_345184

https://www.mathworks.com/matlabcentral/answers/368029-how-to-sketch-the-following-signal-x-t-3u-t-10-4u-t-3-r-t-2-4r-t-2u-t-2-2r-t-3-2u-t-4#answer_292042

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Daniel Schilling 2018-11-5

Ok fair. I realized after I posted this I had to define the piecewise function for the step. Now my question is, using the example you provided, I'm being told piecewise is an undefined function. Is that not built in?