Why does the MATLAB plot show up with no function on it?
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figure()
x = linspace(0,1000);
y1 = (sqrt(2)*sqrt(x.^4 + 9)) ./ (2*x.^2);
plot(x,y1)
xlim([1,2])
ylim([0.8,2])
回答（1 个）
Your plot limits are outside of the range of the data.
Also you don't have enough (or any data points) in the range of x that you are plotting.
If you truly want to plot for x between 1 and 2 try
figure()
x = linspace(1,2); % just range of interest
y1 = (sqrt(2)*sqrt(x.^4 + 9)) ./ (2*x.^2);
plot(x,y1)
xlim([1,2])
ylim([0.8,2])
3 个评论
Jon
2020-11-10
Note that in your original code
x = linspace(0,1000)
Will generate 50 points (default) between 0 and 1000. This means that your first point is at 0 and the next point is at 10.101, so you didn't have any data at all for x between 1 and 2 which is what your plot limits were set to
Liam Reid
2020-11-10
Jon
2020-11-11
Please accept this answer if it solved your problem
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