filter array

[Tohatsu]

I have 4 inputs channels, each containing 8 values (32 channels), and I want to meanfilter each channel all with the same filterlength...I know this seems like a very newish question, but in that case, the reply should be realtivly easy too 😉

see image for details

[andre.buurman@carya]

Duplicate post

If you need to add more info you can either "Edit the post" or post a reply to your previous post.


Message Edited by Support on 12-04-2007 11:40 AM

[Tohatsu]

look at the times, they were posted simultaneously, could not find a delete, flagged it to the moderators...sorry

[Laura F.]

Hi all,

I removed the duplicate post, so I am sure Tohatsu would appreciate any help given on this thread.

Regards,
Laura
Web Support & Operations
National Instruments

[andre.buurman@carya]

You could use the point by point VI in the Signal Processing palette.

[Tohatsu]

Yes, and that is what I've been doing for testing puropses, but I dont want 32 of them lying around in my VI...but maybe that's the only solution?

[altenbach]

Repetitive task with a fixed number of iterations typically call for a FOR loop and one instance of the code. Could you show a bit more of your VI or even attach it?

[Tohatsu]

Attached VI

[Tohatsu]

Bump

tried some for-loops, but it seems I must be doing something wrong...cause all the data is just messed up with this method.

Message Edited by Tohatsu on 12-17-2007 02:49 AM

[altenbach]

The NI pt-by-pt mean filter is reentrant, so using it in a FOR loop on 32 channels will not work as expected.  You would still need 32 instances, one for each channel.

The pt-by-pt meanfilter is a plain VI, meaning you can modify it for your own purpose. Make a copy of it under a new name and change it such that it takes an array as input and will do a meanfiltering operation on each element (channel). Shouldn't be too difficult. 🙂