add line in a plot

Hello I have a figure with datetime in x- axis. I want to plot a vertical line but through code where is the exact point but i receive an error.

Any ideas how to do this?

Answer 1

[Steven Lord]

First, plot some duration data.

y = (0:59);
x = duration(0, y, 1);
plot(x, y);

Now add a line at a specific value. Note that since I plotted with duration data on the X axis, when creating an xline I must create it at a duration value. If I tried something like xline(15) that wouldn't work.

xline(duration(0, 15, 0))

[Ancalagon8]

"Undefined function or variable 'xline'."

[madhan ravi]

It was introduced in 2018b so if you’re using a prior release it won’t work.