Hi Sarah,
There is a program written in R that you might find useful with a bit
of tweaking. The program reads input files created with RAMAS Metapop,
varies parameters (including the dispersal distance matrix parameters)
according to user-defined functions, rewrites the manipulated input
files, and runs the PVAs with a batch file. We have used the code
primarily for sensitivity analyses of spatial PVA models created with
RAMAS software, but have also customized it extensively for other
purposes.
The code should be available next month as a supplement to:
Curtis, J. M. R., and I. Naujokaitis-Lewis. 2008. Sensitivity analysis
of population viability to spatial and non-spatial parameters using
GRIP. Ecological Applications 18(4):1002-1013.
If you are interested I can forward the code to you and provide some
suggestions as to how you might customize it for your own purposes.
Cheers,
Janelle
Quoting Sarah Wakamiya <[EMAIL PROTECTED]>:
I'm using the PVA analysis software program RAMAS/GIS and am trying to alter
the distance dispersal matrix. I have a distance dispersal function but
would like to manipulate rates between certain populations. Unfortunately I
have over 200 patches, which makes manipulation very tedious (and subject to
error) if I am calculating them by hand and entering the new rates in. Does
anyone know if there is a way to export the matrix into excel, manipulate it
in there, and import it back in? Thanks any help would be appreciated!
