[ncl-talk] Remove trend from a data having non-linear trend

[Dennis Shea]

There is no explicit function to remove some unknown non-linear response.

You must ascertain (eg: eye-ball) the 'shape' of the non-linear response
and use a function: eg
   http://www.ncl.ucar.edu/Document/Functions/Built-in/lspoly_n.shtml
to generate some baseline. You can remove the non-linear response via
(data-lspoly)
Note: you should plot the output from lspoly_n to make sure it is
appropriate.

An example of using lspoly is here:
http://www.ncl.ucar.edu/Applications/regress.shtml#ex6



On Mon, Jun 26, 2017 at 10:20 AM, SBR climate <sbr.climate at gmail.com> wrote:

> Hi NCL users,
> I have generated an area averaged time series where the data is having
> non-linear trend.Is there any function available to to remove the trend
> from the time-series having non-linear trend.
>
> Thanks
> SB
>
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