Floating Nested Loop?

[cheyne]

Dear All,

I have a problem in creating a "floating" nested for loop. Please look at the picture. There is 4 variable to be sweep and the sequence of the 4 variable can be selected by the end user. How can I create this by using labview? Please advice.

Thanks

Cheyne


Message Edited by cheyne on 06-09-2008 08:41 AM

Message Edited by cheyne on 06-09-2008 08:42 AM

[RavensFan]

I don't know what you mean by a "floating nested for loop".

If you are looking for a while loop that changes from one reading to another in sequence, but the sequence is variable, it sounds like you want a state machine architecture.  Search the forums for that phrase and look at New VI... architectures.  You basically would have a case structure inside a while loop.  There is an enum control that is passed from one iteration to the next through a shift register that controls which case is executed in the next iteration of the while loop.  This allows you to operate different cases in a sequence, but vary the sequence while running as needed.

[smercurio_fc]

It sounds like you're looking to create 4 nested loops, but the order of nesting varies depending on the order of the variables in the table. You cannot programmatically change the order of the loops once you plop them down. I agree that a state machine architecture is your best bet. Very flexible.

Message Edited by smercurio_fc on 06-09-2008 09:07 AM

[cheyne]

Hi,

Thanks for prompt reply. Is there any example for State Machine?

[smercurio_fc]

You can start by looking at the page that I provided as a link in my reply.

[Ben]

"You cannot programmatically change the order of the loops once you plop them down. "

Agreed but you can easily manipulate the output using a cluster sort by simply changing the order of the components in the cluster.

Have fun,

Ben

[smercurio_fc]

I would suspect it would be easier to keep the data in a multi-dimensional array. This way, you're just changing the interpretation of the indices, rather than trying to reshuffle clusters.

[cheyne]

Can you write me a simple 2 variable netsted for loop where user can choose who 1st and who second. Appreciate alot.

[Ben]

This is a quick demo of implementing an arbitrary sort. Yes, the idexes must be unique. Did not test it. Let me know if you spot something wrong here.

Trying to help,

Ben

Message Edited by Ben on 06-09-2008 10:10 AM

Message Edited by Ben on 06-09-2008 10:12 AM

[cheyne]

Thanks for the program. However, it seems like it is not the one I am looking for.