Problem obtaining minimum negative value in an array

I have written a code to plot the Damped sine wave and to mark a minimum value on the curve.

function m = plot_cos(t, y)
plot(y,t,'b--') 
hold on
[m,~] = min(y)
plot(m,'*r') 
hold off
end

Input arguments passed:

t = linspace(0,15,400);
y = exp(-0.5*t).*cos(2*pi.*t);

Issue: Not able to plot the minimum value of y. Am I erring in line no. 4??

[Adam Danz]

No error in R2021a.

Any time you're asking about an error, please provide the entire copy-pased error message.

t = linspace(0,15,400);
y = exp(-0.5*t).*cos(2*pi.*t);

m = plot_cos(t, y)

m = -0.7812

function m = plot_cos(t, y)
plot(y,t,'b--') 
hold on
[m,~] = min(y);
plot(m,'*r') 
hold off
end

[Omprakash B]

Yes sure. And i was erring at Line no.4. Now I have understood. Thanks.

Answer 1

[Chunru]

t = linspace(0,15,400);
y = exp(-0.5*t).*cos(2*pi.*t);
plot_cos(t, y)

m = -0.7812

i = 14

ans = -0.7812

% plot t-y or y-t?
function m = plot_cos(t, y)
plot(y,t,'b--') 
hold on
[m, i] = min(y)         % need to get the location of min
plot(m, t(i),'*r')      % plot the min point
hold off
end

[Omprakash B]

Yes, its plot(t,y).

Thank you.

[Image Analyst]

@Omprakash B, please click the "Accept this answer" link to award @Chunru his reputation points and to let everyone else know it's solved. Thanks in advance.

[Chunru]

@Image Analyst Thanks for the kind reminder above. I observed that about 30-40% questioners tend to "forget" click "Accept this anser".