how can I stop a for loop that is placed inside a while loop and another for loop?

[luz2]

Hello, first of all sorry for my english. I'm working with DACmx. I receive a signal (an array) with 5000 samples per second. I have a while loop (main while loop) for reading this signal, but I can read only the first sample. For reading all data I'm using inside the while loop a for loop with N=5000 nested to another while loop, which is nested to the main while loop too. But when I stop the main while loop the another don't stop. What can I do?

Thank you very much.

Luz

[GerdW]

Hello Luz,

you cannot stop a FOR loop. But you can do 2 things:
1) replace the for loop with a while loop. Now you can have more than one stop signal for this loop (reached 5000 iterations OR main stop button).
2) place a case structure inside the for loop containing all code of this for loop. Wire the main stop button to this case structure (use a local variable to get the most current state of this button!)

[TiTou]

Hello luz,

I'm not sure I understand what you want to do... You can stop the FOR loop before it has run the specified number of time (5000 in your case) ; if you mean you want to stop the 2 WHILE loops at the same time, then the way to do it will depend on how they placed, can you post your VI ? That would be easier to help you... 😉

[luz2]

Thanks, TITou and Gerdw, I send here my file so you can understand what I'm trying to do. The variable Y is an array of 5000 samples, and it is changing. I want a variable that contains all the components of the array, one after another, and iteration after iteration.

Y(0)_iteration1

Y(1)_iteration1

.

.

.

Y(5000)_iteration1

Y(0)_iteration2

Y(1)_iteration2

.

.

.

Y(5000)_iteration2

Y(0)_iterationN

Y(1)_iterationN

.

.

.

Y(5000)_iterationN

Thank you very much

[GerdW]

Hello Luz,

I changed your vi a little bit. Now it should do what you said it has to do.

[luz2]

Thanks GerdW. I need what you do, but not like an array. I want "collected Y data" like a number, not like an array. Can you help me?. Thank you very much.

Luz 

[GerdW]

Hello Luz,

what exactly do you want?
If you want a number, it can only contain one value. If you want all values, you need an array. OR: you convert all values to strings and concatenate those strings. But be aware: this string can grow and grow and this can lead to problems (memory consumption, loop time will increase and so on).

[luz2]

Thank you another time, I haven't a good english and it's dificult for me to explain what I want. I need a number, but I need this number changes often than Y, exactly 5000 times faster than Y. I need monitorize all the signal values, can't you help me?

[GerdW]

Hello Luz,

I don't understand what you are trying to do...
How fast do you aquire the 5000 Y values? How fast should be the display of those Y values?
How fast can you watch these values? If you display 10 values per second you need 500s (or 8.3min) to display all 5000 values...

Maybe a chart control can help you.

Message Edited by GerdW on 03-08-2006 01:09 PM