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LabVIEW
Insert into array keeping previous values
Solved!
It is always easiest of you do things in a certain order:
Wire the output of the build array to the right shift register to automatically define its type as 2D DBL array and the rest will fall in place. Then go to the left shift register and "right-click...create constant" to initialize it with the correct type too.
(By the way, my image above is a LabVIEW snippet. All you need is to drag it to the block diagram and it will turn into valid LabVIEW code.)
Your snippet is useless to troubleshoot. You did not include the subvi inside the loop. What does it do?
Maybe you want to place another shift register in the outer loop and wire the 2D array across so you keep a history across all iteratoins of the outer loop. Currently, you reinitialize the inner loop after each iteration of the outer loop, dropping all data between iterations, leaving you only the last set of 10 rows.
It also does not help if you tell us that you are getting "strange results". Thus is not a useful technical term. Please describe in detail in what way the results are "strange", what results you actually get, and what results you expect.
Hi KB29,
Instead of using the index array function, just wire up your loop iteration to the index of your Insert Into Array function. See screenshot. Let me know if you have any further questions!
Regards,
Travis Ann
@Travis Ann N wrote:
Instead of using the index array function, just wire up your loop iteration to the index of your Insert Into Array function. See screenshot. Let me know if you have any further questions!
No, that's overly complicated.
If you want to start with an empty array, we don't even need the control on the left outside, and if this controls contains existing data, your code would push old data at the end of the array and retain it forever out of order, because "insert into array" is hardwired to the array index.
A better choice is a plain "Build array" as in the following code. The control (array in) on the left is only needed if you want to append to earlier data, else replace it with an empty array diagram constant (or even leave the shift regsiter unwired).
Be aware that growing arrays indefinitely, will have you run out of memory at one point.
