Adding vertical line to graph

Hello,

I'm trying to present a vertical line to my graph as you can see below but I don't get the curve of the vetical line

Answer 1

[Cris LaPierre]

If you are on the latest version of MATLAB (18b), try using the new xline function.

xline(x1)

Otherwise, what happens if you use the plot function instead of line?

plot([x1 x1],[y0 y1])

[Cris LaPierre]

Never mind. I see what you are doing.

You plot your line using frequency(k) for x, but everything else is plotted using frequency(k)/1e9 for x. Your line is being plotted waaaayyyy off to the right.

You also set the limits of your X axis using the axis function to frequency/1e9.

Your lines are there, but you've clipped them off. Try

x1 = x1/1e9;
line([x1 x1],[y0 y1])

or comment out the line of code containing the axis command. This will make it more obvious what is happening.

[ferdaous abderrazak]

thank you

Answer 2

[madhan ravi]

Save the variable in each iteration and plot it outside the loop , you seem to be overwriting them so finally you try to plot a point . Upload your code if you are not able to figure it out.

[ferdaous abderrazak]

I will try to do it