Plot of maximum value of chosen column in matrix

 clear
 close all
 clc

 t = linspace(0,10,15);
 t = t';
 rng default
 M = rand(15,5);

 plot(t, M(:,1));
 max_M = max(M); %maximum of each column
 max = max(max(M)); %total max

I would like to plot maximum value of first column of matrix M(:,1); and indicate this information on a plot.

Something like this:

Answer 1

[madhan ravi]

t = linspace(0,10,15);
t = t';
rng default
M = rand(15,5);
plot(t, M(:,1));
hold on
m = M(:,1)
[P,K]=findpeaks(m)

plot(t(K(1)),P(1),'x')
hold off

[madhan ravi]

if you got your answer accept the answer so people know the answer is solved else let know

[/matlabcentral/profile/authors/13737395]

Generally, plot is ok. To be more precise,I want to plot like in .png file I have attached in question and I want to detect one maximum value (0.9706)

[/matlabcentral/profile/authors/13737395]

starting_point, ending_point - You mean I should define here X abscissa?

[madhan ravi]

Check the edited answer now

Answer 2

[jonas]

In this case you could simply find the max in each column in one go

 [vm,idx] = max(M); %maximum of each column
 plot(t,M);
 scatter(t(idx),vm,'rx');

would you prefer to plot only the max of the first column, then

scatter(t(idx(1)),vm(1),'rx')