Dennis Shea shea at ucar.edu
Fri Sep 5 11:33:36 MDT 2014

```This question is a bit ambiguous.

Assuming y(time,lat,lon)      ; (ntim,nlat,mlon)

yNew = dtrend_n(y, True, 0)                     ;
yNew=dtrend(y(lat|:,lon|:,time|:), True)

slope  = *onedtond*
<http://www.ncl.ucar.edu/Document/Functions/Built-in/onedtond.shtml>
(yNew at slope,(/nlat,nlon/))    ; slope(nlat,mlon)
copy_VarCoords(y(0,:,:), slope)
slope at long_name = "..."
slope at units           = "..."
printVarSummary(slope)

; arithmetic stddev

slope_std = stddev(slope)

The weighted stddev could also be determined by weight the grid by (say)

On Sat, Aug 30, 2014 at 2:51 PM, Verena Lili <verena.prick at gmail.com> wrote:

> Hallo,
>
> Anybody try to have a standard deviation of the trend using "dtrend"
> function? I'd like to plot the trend values together with the
> their stdev. Thank you..,
>
> Cheers
>
>
> --
> Regards,
> Dr. Verena.
> School of Marine and Atmospheric Sciences
> Stony Brook University
> homepage: http://www.somas.stonybrook.edu/
>
>
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