How to create and move a line when I put the mouse on an axes?

Hello,

I would like to create a line when I colocate the mouse in front of an specific axes for example axes1. When I move though that axes the line has to move with me and when I click I hace to obtain the x position where I am.

Thank you!

Answer 1

[J. Alex Lee]

does the built-in matlab function ginput() do what you want?

[Collegue]

No, I have to update the position while I am moving thorugh that specific axes

[J. Alex Lee]

When you say "axes", do you mean the matlab object referring to the plotting area, or do you mean the number lines?

[Collegue]

I mean the plotting area

[J. Alex Lee]

There are many posts related to this topic, and it's worth your looking through previous Answers that match closely the behavior you are trying to achieve.

One complication is the diverging support of functionality between the classic plotting and the new web-based plotting.

Look for these keywords: WindowButtonMotionFcn, WindowButtonDownFcn, ButtonDownFcn

Minimum working example based on your original question, but it does basically a bit less than what ginput() already does. Hope you find the appropriate snippets in there to customize to your needs.

fig = figure()
ax = axes(fig,'NextPlot','add','XLimMode','manual','YLimMode','manual')
ph = xline(0,'HitTest','off')
fig.WindowButtonMotionFcn = @(o,e)WBMF(o,e,ax,ph)
ax.ButtonDownFcn = @(o,e)BDF(o,e,ax,ph)

function WBMF(this,evnt,ax,ph)

ph.Value = ax.CurrentPoint(1,1);

end

function BDF(this,evnt,ax,ph)

fprintf('clicked at x position: %.2f\n',ax.CurrentPoint(1,1))

end