Has anyone "zoomed in" on a portion of a waveform graph?

[davey31415]

Has anyone ever used two cursors to zoom in on a portion of a waveform graph?

I've seen that newer Oscilloscopes offer features to do this both horizontally and vertically. 

See the attached jpg for an example of what I'm trying to do.  It is from Google Finance.  Notice the area circled in red.  The two cursors define the portion of the waveform to be displayed on the main graph.  There is also a scrollbar beneath them which allows the user to quickly move the zoomed-in area across the graph- I would love to have that functionality on the LabVIEW graphs. 

My first thought is that I can do this using mostly property nodes.  Not sure on vertical zooming scrolling the horizontal zoom- I'm thinking maybe this would best be done using scrollbars which are not part of the graph itself. 

Any ideas or comments?

Thanks,

Dave

[Coq_Rouge]

Cursor position is available in Labview via a property node. You can also set about every chart property with property nodes. I have used this many times. Here is a trick. If you have two cursors, Make separate arrays of the x and y  positions. Then  use the "Array max&min" to sort them. This will make your program independent of the cursor sequence.

[smercurio_fc]

You don't need cursors to zoom. Use the graph palette. It has tools for this.

 

Message Edited by smercurio_fc on 02-13-2009 10:11 AM

[Coq_Rouge]

I know my Labview basics I have worked with labview since Labview 3.1. But often my customers find it more convenient to move cursors around to do just the thing showed in the original posting. The cursors position selects an area to be "zoomed" up in another plot. This way you can display the full view and details in the same window or screen

[Balanceman]

I am afraid I have no answer for you.

But the functionality you mean is very neat. I also would like to have such a nice "zoom" view.

My impression is that the graphical displays in Labview have not been very much cared about in the last couple of new versions.

I really would appeciate if NI would put part of the development forces there.

Cheers

Gerd

[smercurio_fc]

---

t06afre wrote:
I know my Labview basics I have worked with labview since Labview 3.1.

---

I wasn't implying that you didn't. I was responding to the original post.