Re: [R] Modifying the design matrix X in GAMS to suit data assimilation

Eli, I think that this should be possible. If your integration allows you to express the salinity as a weighted sum of evaluated values of the spatial smooth function (where the weights are known), then you could use the summation convention for smooths described in ?linear.functional.terms.

Re: [R] Modifying the design matrix X in GAMS to suit data assimilation

Thanks Simon! I can use the functional approach to bridge the gap between this and more traditional forms of data assimilation. At the moment, though, what I am doing is related to your work with soap films, in which your response comes from linearly combine solutions of a PDE evaluated at the

[R] Modifying the design matrix X in GAMS to suit data assimilation

I have a data assimilation problem that might be amenable to the use of GAMS, but I am not sure how feasible it is to implement. I was told the R mailing list was a great resource. My observations are spatiotemporal salinity in the San Francisco Bay at a number of instruments over a few days.