extrapolation

[redhat007]

dear friend
i know that ROMS just do interpolation not extrapolation. So, i am looking froward some functions (especially in Matlab) for extrapolating input fields.
Can you help me
cheers
redhat

[lithodes8]

Hi, I understand that extrapolation is like interpolation only in the end put a zero and matlab extrapolated.

Vq = interp3(___,method,extrapval*) also specifies extrapval, a scalar value that is assigned to all queries that lie outside the domain of the sample points.

If you omit the extrapval argument for queries outside the domain of the sample points, then based on the method argument interp3 returns one of the following:
The extrapolated values for the 'spline' method
NaN values for interpolation methods other than 'spline'

* This valor is cero (0).
works for me...
regards

[rtopper]

You can also use this function:
http://de.mathworks.com/help/matlab/ref ... class.html

With examples of how to use it for extrapolation here:
http://de.mathworks.com/help/matlab/mat ... ation.html

[turuncu]

Hi,

You can use NCL to extrapolate data. Look at the following page,

https://www.ncl.ucar.edu/Applications/grid_fill.shtml

You could also use ESMF regridding capability in NCL. In this case, you could perform two step interpolation. Look at the attached example. It interpolates low resolution atmosphere model output to high resolution ocean model grid. I hope it helps.

--ufuk

[d.kobashi]

I used to use the following function. Worked fine.
http://www.mathworks.com/matlabcentral/ ... paint-nans
Use with caution.

DJ@TAMU

[redhat007]

Dear friends
i would like to offer my heartfelt appreciate for your kindly replies
cheers
redhat