Displaying 3 results from an estimated 3 matches for "advection".
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2008 Jul 22
1
rollmean and stl
I need to investigate how rollmean and the trend returned from stl differ.
I am trying to find out exactly what the trend part of stl is (I have just
started coding in R and do not know fortran). I need to extract this
because it will be used in further calculations, and it needs to be verified
to make sure that I am using the right process. I would like to use this
to remove the seasonal
2005 Nov 14
1
(no subject)
Hi,
I am trying to solve a model that consists of rather stiff ODEs in R.
I use the package ODEsolve (lsoda) to solve these ODEs.
To speed up the integration, the jacobian is also specified.
Basically, the model is a one-dimensional advection-diffusion problem,
and thus the jacobian is a tridiagonal matrix.
The size of this jacobian is 100*100.
In the original package LSODA it is possible to specify that the
jacobian is banded, which makes its inversion very efficient.
However, this feature seems to have been removed in the R ve...
2007 Nov 28
0
Power Spectral Sensity
I am working with a dissolved oxygen dataset. continuous readings are taken
at 15 minute intervals and we have been recording these data at 12 stations
along the savannah river for two years now. The longest set of readings
that are continuous without interuption is 53 days. I would like to look at
the power spectral density at each of these sites (most likely one day will
be the overridding