Hello I have a project in which I'm waiting for a string message coming to my Serial port containing two parameters from a sensor ,Tension versus positionI shall then plot the two parameters to an XY graph as they are arriving to my port in order to build a graph which is continously updated with all the points came to the COM port (all tension readings versus the position of the reading). I know that in order to plot the two parameters against each other I have to use the XY-Graph and for that ,I have to insert my data into arrays first and then give them to the graph. The problem is that the serial message does not come at fixed interval (for example one message comes now ,the other may be after 1 minute ,and then another after half a minute ...and so on). and the graph has to be updated with the new points once they arrive (in addition to display the previous points too ofcourse). I don't know where to start !! can someone put me on a track for that ?! Note: I don't have any problems with the interpretation of the serial data ,at the end I shall have two numerical values which I shall then plot against each other Thanks

One thing I didn't notice before on your VI is you are using the wrong function when building data onto your array. You should be using Build Array. Not Insert into Array which is more meant for stuff going into the middle of an array. And the way you are using it, you are actually inserting data at the beginning and not the end. I don't know what you tried and why you think circular buffer is not what you want to do. Take a look for a function called Data Queue Pt by Pt which effectively does what you want. I'm going to attach a subVI I have used. I modified this from something I found. I think I found it somewhere within LabVIEW itself, or an example, maybe the forums, but I can't find the original source again. And I don't see it in the comments of the VI. (If anyone knows, please comment.)

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