how to add text to my plot

hi!

i want to write text on the plotted graph next to the min and max values of my function and i can't find it in the figure window

there is another options to find the min max values and write a text next to the graph?

thanks!

clear all
clc
t=0:0.01:2*pi;
s=1;
P=(4*sin(2.*t).*exp(-(t/s).^2)+2).*(0<=t<pi/2)+...
    (4*sin(2.*t).*exp(-t/s)+2).*(pi/2<=t<=2*pi);

plot(t,P);

[a,b]=max(P);%
[c,d]=min(P);%
text(t(b),a,'maximum');%
text(t(d),c,'minimum');%

xlabel('time');
ylabel('power');
legend('p(t)');
title('power vs. time');

[Stephen23]

Your code works for me, what do you expect to happen?

R2012b:

R2015b:

[ron tzuberi]

hi!

the problem is that i can't see the text('min','max') over the graph:

but i think madhan ravi,the guy who sent a comment after you already answer me

btw,what is the problem with my matlab?we put the same code,why doesn't my matlab show the text over the graph?

thanks!

[Stephen23]

@ron tzuberi: strange. What MATLAB version are you using?

[ron tzuberi]

@Stephen Cobeldick: i'm using R2018b

Answer 1

[madhan ravi]

t=0:0.01:2*pi;
s=1;
P=(4*sin(2.*t).*exp(-(t/s).^2)+2).*(0<=t<pi/2)+...
    (4*sin(2.*t).*exp(-t/s)+2).*(pi/2<=t<=2*pi);
plot(t,P);
[a,b]=max(P);%
[c,d]=min(P);%
hold on
plot(t(b),a,'*b','MarkerSize',10)
plot(t(d),c,'*k','MarkerSize',10)
text(t(b),a,'maximum');%
text(t(d),c,'minimum');%
xlabel('time');
ylabel('power');
legend('p(t)');
title('power vs. time');

[ron tzuberi]

hi!

thanks a lot,i think that i found the problem with your help.....

It matters where you put the line:

plot(t,P);

you put it before the lines:

text(t(b),a,'maximum');

text(t(d),c,'minimum');

thanks a lot!