Not seeing second plot data

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Red Hawk
Red Hawk 2021-5-2
回答： VBBV 2021-5-3
I'm plotting sin(theta) and theta, and that's working. But I'm also trying to plot the error between the two as a percentage, and plot that against theta. The second plot shows up, but there's no data. Please let me know if you can reproduce, and if I'm doing something wrong.
Also, how can I print out the values of the pct series so I can see the actual numbers?
Thanks.
theta = 0:0.02:1;
y = sin(theta);
plot(theta, y, theta, theta)
grid
pct = 100 - (100 * (theta - y) / y);
plot(theta, pct)
grid

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采纳的回答

VBBV
VBBV 2021-5-3
%if true
theta = 0:0.02:1;
y = sin(theta);
figure(1)
plot(theta, y, theta, theta)
grid
pct = 100 - (100 * (theta - y)./ y);
figure(2)
plot(theta, pct)
grid
Try this For second figure, use element wise division operator

更多回答（1 个）

David Hill
David Hill 2021-5-3
theta = 0:0.02:1;
y = sin(theta);
plot(theta, y, theta, 1- (theta - y)./y);%need ./ also to keep it the same scale chose 1 instead of 100

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