How do I plot a line rather than seperate points?

Question

Rowan Miller 2017-12-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/371053-how-do-i-plot-a-line-rather-than-seperate-points

回答： John D'Errico 2017-12-5

t = -2;
yo = 5;
w = 5;
k = 0.1;
for t = -2:20
    if t < 0
      y = -yo;
  elseif t < 10
      y = -yo*(cos(w*t));
  else
      y = -yo*(cos(w*t))*exp(-k*(t-10));
    end
    plot(t,y,'.'); hold on
end
hold off

This is the code. I've looked everywhere and I just cannot figure out how to plot the oscillation curve I need from the given data in the code. Any help is appreciated. Thank you.

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Answer 1

John D'Errico 2017-12-5

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/371053-how-do-i-plot-a-line-rather-than-seperate-points#answer_294660

Don't plot each point, ONE at a time. You cannot easily connect a new point to the last. (Well, you could do it, but it would be insanely silly to do so.)

Create the result as a vector, then call plot ONCE.

Learn how to use MATLAB. MATLAB is all about vectors and arrays.