i need code for small project

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Marwan Tayfour
Marwan Tayfour 2021-10-11
回答： Image Analyst 2021-10-11
if x= sin t
x=sin 2t
t=0 :pi/2:pi:3*pi/2:2*pi:5*pi/2:3*pi7*pi/2:4*pi
i need the diagram

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回答（2 个）

Image Analyst
Image Analyst 2021-10-11
I don't even know what that means. Please use more words to explain, and maybe attach a diagram that you think it should look like.
You have to define both t and x before you do "if x=sin t" and the proper way would be
if x == sin(t)
but even that is not good since they're floating point numbers so you should read the FAQ:
https://matlab.fandom.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
But anyway not sure what Diagram means, but did you try plot:
plot(t, x, 'b-.', 'LineWidth', 2, 'MarkerSize', 20);
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KSSV
KSSV 2021-10-11
Ran in:
t=0 :pi/2:pi:3*pi/2:2*pi:5*pi/2:3*pi/7*pi/2:4*pi ;
x1 = sin(t) ;
x2 = sin(2*t) ;
plot(t,x1,'r',t,x2,'b')
legend('sin(t)','sin(2t)')

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