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How to get a line plot

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B!nd
B!nd 2021-11-29
评论： B!nd 2021-11-29
i need 3 lines in my graph. one of them is a straight line parallel to x axis at y=200 from x=25 to 45. im not able to get the line
x=[25,32,45]
y1= (20.*3.*1000)./300
plot(x,y1,Color='black',Marker='.')
axis([20 50 100 400])

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Chunru
Chunru 2021-11-29
Ran in:
x=[25 45];
y=[200 200]
y = 1×2
200 200
plot(x,y,Color='black')
axis([20 50 100 400])

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