How do I create an XY Graph where X=type_string, Y=type_double?

[RichardBallantyne]

Hi,

I would like to plot measurement Y against serial number X.  Measurement Y is of type double, and the serial number is just a string.  When I bundle an array of X and an array of Y into a cluster, and try to feed it into the XY Graph icon on the block diagram, I get a broken wire.  I need the flexibility of plotting some numerical value against a string that I create.  This is possible in Excel, is it possible in LabVIEW 2009 SP1?  If so how?

Thanks,

Richard

[smercurio_fc · Accepted solution]

This has come up several times before. No, the graphs do not support that. You basically need to cheat. See this post for an idea.

[JÞB]

in LabVIEW charts and graphs are based on a cartesian system.  You need a magnitude (scalar number) for each dimention.  You can associate a scalar numeric value to each unique string (think- ring or enum controls or an array index) but you must have a magnitude for each dimention.

[RichardBallantyne]

The solution that smercurio_fc linked will probably work for me -- thank you smercurio_fc.

To be honest, this solution is rather cludgey.  I wish NI would implement something more elegant by expanding the list of acceptable inputs to the XY Graph to include strings.

Thanks again,

Richard

[smercurio_fc]

Then you should vote for the idea.