plotting multiple graphs and adding a straight line

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Lim Zhi Yang
Lim Zhi Yang 2020-10-1
评论： Star Strider 2020-10-1
I am trying to plot multiple graphs, and I want to add a straight line of y = 2.3 into the graph but it only shows my first two plots which are x1,OA and x2,OF.
here is my code
x1 = [0:1:101];
OA = 0.00022494*x1.^2;
x2 = [0:1:74.4];
OF = -0.00018056*x2.^2;
x3 = [101:1:265];
AC = 2.3;
plot(x1,OA,'r',x2,OF,'r',x3,AC,'r')

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采纳的回答

Star Strider
Star Strider 2020-10-1
There are at least 2 ways to do that:
x1 = [0:1:101];
OA = 0.00022494*x1.^2;
x2 = [0:1:74.4];
OF = -0.00018056*x2.^2;
x3 = [101:1:265];
AC = 2.3;
figure
plot(x1,OA,'r',x2,OF,'r',x3,AC,'r')
yline(2.3) % First Option
figure
plot(x1,OA,'r',x2,OF,'r',x3,AC,'r')
hold on
plot(xlim, [1 1]*2.3, '-b') % Second Option
hold off
.

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