Plot with 2 parameters
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syms r teta x y
teta= -90: 0.1: 90;
r= 0.5:0.1:1.5;
x=sind(teta).*r;
y=cosd(teta).*r;
plot(x,y)
that my code, I want to see a plot like half disc with a hole but it doesnt work :(
回答（1 个）
Alan Stevens
2021-1-9
Do you mean something like this:
theta = -90:90;
ri = 0.5; ro = 1.5;
x = [ri*cosd(theta) ro*cosd(-theta) 0];
y = [ri*sind(theta) ro*sind(-theta) ri*sind(theta(1))];
plot(x,y), axis equal
3 个评论
Hakan Güngör
2021-1-12
Alan Stevens
2021-1-12
Yes, use a for loop. You haven't said if the values from 0.5 to 1.5 refer to ri or ro. Presumably you need to specify values for both.
Hakan Güngör
2021-1-12
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