Sum array elements not working

[snidjer]

I am trying to output the average % standard deviation per point for a series of data sets.  To do this I want to use the sum array elements function.  The program I have written should work I am pretty sure, but when I watch data flow through it, 1000 points get input into the sum function and NaN comes out.  What could cause an error like this?  I have tried inverting my array, etc.  Is there a limit to the number of points the function can take?  Or to the precision of the points being input?  Thanks, this is driving me crazy! 

[I renamed the file and attached it again so you can open it - Molly K]

Message Edited by Support on 07-06-2005 08:23 AM

[altenbach]

 Please reattach your file with a reasonable file name. (e.g. no % sign). Currently, it cannot be downloaded.

[rolfk]

Any arithmetic operation on a NaN value is invalid and must result in NaN as well. You probably need to make sure first that your array doesn't contain NaN, Inf, and -Inf.

Rolf Kalbermatter

Message Edited by rolfk on 07-05-2005 11:37 AM

[snidjer]

Yes, my array did have an NaN in it (I was just using a bunch of instrument noise).  My sanity has returned.  Thanks! 

[Sheldon_Stokes]

If you are just doing an average, you can sort the array and filter out the non-numeric values which will be clustered together.  This is a quick and dirty trick, but beware, the compute time goes up exponentially with array size so use it with caution. 

Sheldon