Compare elements of two or more clusters

[mnanda98]

Hello,
I am very new to labview and was hoping someone could help me with this. I am taking user input (motor #, size of steps, number of steps and sequence #) and storing all the data (for each motor) in a cluster.

(Now this is where I need help..)
I want to take the 4th element of each cluster (the sequence #) and sort it in order (1,2,3,4...). Based on the sequence number I want to use a flat sequence structure to send the commands to my motor controller in the right order.

Any help in solving this problem would be appreciated,
Regards,
Mridu

[crossrulz]

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mnanda98 wrote:  Based on the sequence number I want to use a flat sequence structure to send the commands to my motor controller in the right order.

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No you don't.  You want to use a FOR loop with autoindexing tunnel.  First of all, you will want your sequence number to be the first item.  Then you have an array of motor clusters.  You can then just use Sort 1D Array to get the order correct.  Then you autoindex on that array with your FOR loop to send the commands.

[mnanda98]

Thank you for your response. I am a little confused what you mean by array of motor clusters?

[crossrulz]

Maybe this will clear it up...

[Bob_Schor]

The reason Crossrulz said to put the Sequence # first in your Cluster is because sorting starts with the first element, then the second, etc.  If, however, you require that the Sequence number be, say, the third element, you can still sort it by using a trick (only do this if the array of clusters isn't huge) -- create a temporary cluster whose first element is the Sequence # and whose remaining element is the entire cluster.  An array of these things will sort on the first element.  Once sorted, take the Cluster apart and return only the second element, your original Cluster, now sorted.  [I hope that was clear ...]

Bob Schor

[mnanda98]

Hello, thank you both for your help - that makes more sense now. Crossrulz, I was trying to replicate your example but was not able to find what you used on your block diagram? How should I proceed from here? Any help would be appreciated, thank you.

[mnanda98]

Nevermind - I figured it out! Thank you all for your help

[mnanda98]

Hi sorry one more question.. Now I am trying to use my cluster inputs instead of wiring the constants and am very stuck. Here is what I have so far..

[johnsold]

Try posting your VI rather than an image - especially an image of your message.  It is much easier for us to debug a VI than an image.

Lynn

[mnanda98]

My mistake, I posted it in a hurry.. Here is the attached vi: