How can I show the max point on a plot ?

I am having hard time figuring out a way to show the max point on a plot

[darova]

Can you show the code? Did you try max function?

Answer 1

[Star Strider]

Depending on what you want to do, and if there is only one maximum:

x = 0:10;
y = -(x-5).^2;
[ymax,idx] = max(y);                        % Maximum Of Dependent Variable & Index

figure
plot(x, y)
hold on
plot(x(idx), ymax, '^r')
hold off
grid
ylim([min(ylim) max(ylim)+1])

.