Re: eof_4 example error

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Tue Jul 22 2014 - 09:22:12 MDT

This email provides no information that will help determine the problem.

No one is paid to answer ncl-talk questions. It is done on a volunteer
basis.
ncl-talk assumes the user has made an effort to debug their code using
printVarSummary, print and looking at the code.
The examples are not meant to have data plugged-in. They are a guide.

Debugging someone else's code is tedious and time consuming.
It is the responsibility of the person asking the question to make the
issue clear.


NCL, like many tools, uses LAPACK codes to compute eigenvectors.
           "LAPACK routine returned eigenvalue <= 0"

This indicates that the input to the eofunc is likely incorrect.
Please examine your code. Use printVarSummary before
the lines where the error is incurred. Think about what is being done.

Good luck


On Mon, Jul 21, 2014 at 7:20 PM, atu hozi <atuhozi@gmail.com> wrote:

> Hi dear there,
>
> I am trying eof_4 example (http://www.ncl.ucar.edu/Applications/eof.shtml)
> which focuses on computing EOFs; normalizing the principal components; and
> projecting the anomalies via regression to compute the Antarctic
> Oscillation (AAO). I downloaded the geopotential height data and placed it
> in the directory I am working on.
>
> However, it gives me the error messages below. I would highly appreciate
> your help.
>
> Warning! LAPACK routine returned eigenvalue <= 0.
> Setting it to zero...
>
> warning:ContourPlotInitialize: no valid values in scalar field;
> ContourPlot not possible:[errno=1101]
> warning:ContourPlotSetValues: Invalid level values set: using
> AUTOMATICLEVELS mode
> warning:ContourPlotSetValues: Data values out of range of levels set by
> MANUALLEVELS mode
> warning:ContourPlotSetValues: cnLevelSpacingF value exceeds or equals data
> range: defaulting
> (0) gsn_csm_xy: Fatal: There are no values above or below the chosen
> reference line.
> (0) Cannot draw a bar chart
>
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Received on Tue Jul 22 03:22:19 2014

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