get the values of the axis of a plot

I have created a plot and I want to know if there is a command to get the value of the x axis of the plot because I want to draw an horizontal line just as long as the x axis

thanks

Answer 1

[Star Strider]

You can get the limits of the x-axis with:

XL = get(gca, 'XLim');

To plot a horizontal line the length of the x-axis:

plot(XL, [1 1]*val)

where ‘val’ is the y-value of the line.

You can get the values of the x-ticks with:

XT = get(gca, 'XTick');