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Problems with drawing diagrams in MATLAB

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Khashayar K
Khashayar K 2018-6-8
评论： Walter Roberson 2018-6-12
I'm completely new to MATLAB, and I need help with diagrams. I have to compare and draw 3 different wave equations in one diagrams. How can I do so? Or if possible can anyone send the code? Here are the equations:
  1. Y1= 11.5sin((2πλ/4.97) + 63.3)
  2. Y2= 14.6sin((2πλ/10.5) + 45.8)
  3. Y3= 7.36sin((2πλ/4.97) + 63.3)

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回答（1 个）

Nithin Banka
Nithin Banka 2018-6-8
Refer to Hold documentation. Example:
x = linspace(-pi,pi);
y1 = sin(x);
plot(x,y1)
hold on
y2 = cos(x);
plot(x,y2)
hold off
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Nithin Banka
Nithin Banka 2018-6-12
编辑：Nithin Banka 2018-6-12
The size of 'lambda' and size of 'x' must be same. Use size() function to find their sizes. Since in your case 'y1 or y2 or y3' does not depend on 'x' try changing the size of 'x'.
Walter Roberson
Walter Roberson 2018-6-12
lambda = linspace(-pi,pi);
y1 = 11.5*sin(2*pi*lambda/4.97 + 63.3);
plot(lambda, y1)

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