Hi all,I have a problem with my VI. Please refer to attachment. I use it to read data from text file. However, it doesnt work when I want to show the graph of PAlpha and also PV. Please refer to case structure "Calculation of PV". Besides that, I expect to get a one dimension array for Mean of Pressure which is calculated under case structure of Select Pressure and Alpha.Hope anybody could assist me to get the graph.Attached together with this question are the VI, and also subVI. Thank you and have a nice day.

The above is indeed true. There are also a number of other issues with the code: The specific comparison above is meaningless. The comparison will occur after the loops terminate, and the value of the wire will always be the same, unless you change the number of iterations, which you are not. You are not stopping the for loop with a stop condition, so it will always run 250 times. What's the point of the comparison?The attempt to delete the first row from the file that is being read is incorrect. You are wiring a zero to the length input. The "Select Pressure and Alpha" state is getting chunks of 180 values. Unfortunately, you've read 10000 lines, but deleted one, which leaves you with 9999 lines (rows), which does not divide evenly with 180. The for-loop being used to create the 2D array of "Selected Pressure" and "Selected Alpha" can be done with a Reshape Array function.The use of the Formula Express VI causes the unnecessary use of dynamic data. For example, in the "Calculation of PV" state (which is still writing to file), the Formula Express VI can be replaced with a simple Multiply primitive. Also, since the Build XY Graph Express VI is resetting the graph data each time you don't even need to use that Express VI. All you need is a single Bundle function. Doing those 2 simple changes allows you to delete all of the dynamic data conversion in that state. That's it for now. EDIT: Forgot one: In the "Obtaining Parameters" state the for-loop has an uninitialized shift register. Not sure whether this is intentional or not, but I suspect it's an error. Message Edited by smercurio_fc on 04-08-2009 11:12 AM

LabVIEW

Problem obtaining graph

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Hi Smercurio,

My VI is working already after I did some changes on it by referring your issues raised here.

Thanks a lot.

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LabVIEW

Problem obtaining graph

Re: Problem obtaining graph