Creating a linear plot over a plot of giving numbers

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Benjamin Shuey
Benjamin Shuey 2019-2-16
回答： Star Strider 2019-2-16
Currently I am having trouble trying to plot a function. Im trying to create 4 different subplots but I need this one line to be on it for comparison. So for the first sub plot i would have
x1= [10; 8; 13; 9; 11; 14; 6; 4; 12; 7; 5;]
y1= [8.04; 6.95; 7.58; 8.81; 8.33; 9.96; 7.24; 4.26; 10.84; 4.82; 5.68;]
subplot(2,2,1)
hold on
plot (x1,y1)
now with this i need to plot the line y=3+0.5x over a range 0 to 20. So far every attempt i have made has not worked.

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回答（1 个）

Star Strider
Star Strider 2019-2-16
Try this:
plot (x1,y1,'p')
hold on
plot([0 20], 3+0.5*[0 20])
hold off
It’s a linear function, so you only need the limits, not all the intermediate independent data.

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