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Found 4 results

  1. Aishwarya Saravanan

    Writing txt in a excel sheet

    My project involves designing a front end for a synchronous generator using LabVIEW. It is actually data acquisition and display of signals in a file. The problem I face when building a program is that: 1)the sampling rate is set to 100 samples with 1 kHz sampling frequency.These signals are generated by daq assistant and i have used merge signals to merge these signals from daq assistant as well as signals from other radio buttons and Boolean as well. The problem is that when written on a file I am able to see only one instance of Boolean status for every 100 samples daq assistant creates. 2) now iam able to write only 0/1 as status of Boolean in the file.How will I write on /off into file?
  2. pkeny

    Boolean array Variable

    Hey all, I am trying to create a fairly large program. What I want to do is for someone to upload a text file, customized so I can create statements for it, and then labVIEW will read the the text file and perform actions. Specifically, the text will contain pin numbers, on/off status, wait delay, and another on/off status. The pin numbers correspond to a Boolean indicator array. The on/off status tell the Boolean indicator array to turn on/off. The wait delay tells the program to wait how long before changing the indicator array value again, and the second on/off status turns the Boolean array on/off after the wait delay. I cannot get the part where I want the Boolean array to change status after the wait delay. I am thinking the method of doing this would be a local variable, or a property value node. But, when I tried it, it would not even let the original status to turn on/off the indicator Boolean array, let alone changing the status after the wait delay. I have attached my code and text file (tab delimited) for another method of explanation. Altenbach wrote a big portion of the code for educational purposes If you delete the local variable, you will notice that the boolean array changes based on the first text column, versus it being constantly Gray if you have the local variable. ExcelTest.txt Text Boolean.vi
  3. Hello guys! Is it possible to parse and evaluate a boolean expression stored in a string with standard LV VIs? I can't find anything.. Expression like this one: 1==2 && (2!=5 || 2 > 5) I'm building a configuration xml-file with if-attributes for conditions: <item name="xyz" if="{namespace:variable} == 3" /> The first step is replacing the variables within {} with actual values. This is the easy part. The hard part is to evaluate the results...
  4. YoungSchola

    Boolean Loop Choice Test

    Howdy, I am having trouble coding a VI. I am wishing to make boolean based vi in which the user has to select a choice which color is brighter or dimmer? I want to randomize the choices so that it isn't always making a higher choice or alternate the presentation. I want to record the time of presses with the millisecond counter vi. I also want to record the number of correct and incorrect choices so that if they get 3 correct the colors seem closer in brightness and shift the color choices close to matching after 3 correct guesses until they get 3 incorrect guesses. Any insight on how to do this would help greatly. Thanks, Schola
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