"Eigenvectors failed to converge" with eofunc

Hi everyone,
I am just wondering if anyone has seen this error message when using eofunc?
I am working with a lat x lon x time temperature data set, where each entry
on the t axis is a January from a 30 year series.
(So basically I extracted 30 of each month from the main dataset seperately
and saved them as new files).

Here is my script, using the instructions from example 2 in the
documentation to reorder axes.

*eof_jan = addfile("meantemp_jan_EOF.nc","r")
jan1 = eof_jan->V5(:,:,:)*

* jan1!0 = "time" ; name dimensions if not already done

  jan1!1 = "lat" ; must be named to reorder
  jan1!2 = "lon" *
* neval = 3 ; calculate all EOFs
  ev = eofunc(jan1(lat|:,lon|:,time|:),neval,False)
 *

*jan_output = addfile("jan_out.nc","c") *
**
*jan_output->ev = jan1*
**
**
The error message says:

*sub drveof: ier,jopt= 10 0 returned from vcmssm/crmssm*
*warning:eofunc: 10 eigenvectors failed to converge*

Any idea how to fix this?

Thanks,

Aideen Foley

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Received on Mon Mar 02 2009 - 08:36:47 MST