Zoom in on section of intensity graph?

[Azazel]

Hello all,

I need to be able to zoom in on a section of an intensity graph.  I know of the graph pallette but what I want to do is have the original graph, then select a region on the original to zoom in on which will  show up in another graph indicator so I have my original plus the zoomed in region.  Along with this is it possible to have a square or something on the original that will show the user how large and what area he/she is zooming in on?  I have tried to alter some of the shipping vi's like "cursor.vi", or "smith plot with zooming" but have been unsuccesful.  I have attached an example vi that I wrote that displays 2 intensity graphs.  Can any of you point me in the right direction so I can accomplish this display idea or can you let me know if this is possible?

Thanks,

Azazel

[falkpl]

Zooming should be as simple as passing a subset of the intensity graphs data array to a new graph.  You can make it as robust as you want by using the event structure to allow the user to select a subsection if you want.

Paul

[johnsold]

Using X and Y Scale range properties will allow you to see the Zoomed boundaries as shown in the modified version of your example VI.

Lynn

[AntLee29]

Is there a way to send the data in the selected region into a new array?

[Johnner]

Just wire the graph into an "Array Subset" node.  Using a property node of the Intensity Graph, as was done in this example, the inputs to the Array Subset node (top to bottom) are:

- YScale.Range.Minimum
- (YScale.Range.Maximum - YScale.Range.Minimum)
- XScale.Range.Minimum
- (XScale.Range.Maximum - XScale.Range.Minimum)

The output is the subarray you want.

--John