highlight areas on a graph

[superryan]

Hi...

I'd like to highlight specific areas on my 2d graphs. Ideally, i want to draw a semi-transparent area around a mapped point (to show error and certainty). If I could draw an oval and shade it in, that would be perfect.

So far, i've only found transparencies in CNiGraph3D .... and I havent found anything on coloring in plotted areas.

Any ideas?

-Ryan
😃

[SijinK]

Hi Ryan,

I believe what you are looking for are called Annotations. Annotations are used to highlight a point or a region on the graph. There are pointAnnotations where you can highlight a single point on the graph, and also RangeAnnotations where a range of values can be highlighted.

If you are using Visual Studio.NET then you should be able to right click on the graph and select the option "Edit Annotations". Else if you are using Visual Studio 6.0 then you should be able to right click on the graph and select properties; and one of the properties should be "Annotations".

Hope this helps!

Sijink
National Instruments

[Elton Wells]

As Sijink mentioned, annotations provide the functionality that you're looking for. However, you mentioned that you were looking "to draw a semi-transparent area around a mapped point." The annotations in CNiGraph support solid colors, but not alpha-blended colors. The Windows Forms .NET graphs do support alpha-blended colors and you could very easily draw an oval with an alpha-blended fill with the Measurement Studio .NET graphs.

- Elton