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The XY graph takes an array of bundled XY values (or vice versa) as input, it does not care how that array has been created or whether it is in this structure or that. I think there must be some basic consept that you are missing, but upload a copy of your VI or a picture of the code and explain what you are trying to achieve, and we'll probably find a solution.
The GRAPH functios must always work witn an ARRAY. These can be created with either a WHILE loop or a FOR loop. If you want to plot point by point, you will need the CHART functions instead. There is a XY chart example in the HELP files. Good luck!
ERic
Eric P. Nichols P.O. Box 56235 North Pole, AK 99705