Label a plot

Hie all, i want to ask if i have plot a few graphs and the one below is the vertical line.Can i know how to label the vertical line like if the vertical like is z=100, i would like to label it as z=100.

y=get(gca,'ylim');

h=plot([z z],y,'-r');

Thank You Regards, Ean

Answer 1

[Matt Fig]

Use the TEXT function. To see the help, use:

help text

In your case:

z = 100;
y=get(gca,'ylim');
h=plot([z z],y,'-r');
text(z,mean(y),'z = 100') % If text is too close to line, use z+inc.

[Ean Soo]

Thanks Matt. Can i know how to use the z+inc?

[Matt Fig]

inc is just an increment to add to the z. So if your xlim is [99 101], then and increment could be .1. If your xlim is is [0 1000], perhaps a larger increment would work - perhaps 1 or 2. I might even try to make the increment a function of xlim, say diff(xlim)/20 or whatever.