Matlab Gui problem with setting values to slider

I have a X vextor which is X-axis.

I want to make a slider that will go only through these values but the step size is not the same in my variable. How to do it in Matlab Guide?

[Image Analyst]

Do you mean that your x axis has tick labels on it, and you want the slider to take on only values that are the same as the labels?

[Jonasz]

Yes that's what I need