Include the constrain from the observations.
s = divand_obs(s,xi,x,lambda,I)
Set observations of variational problem.
It is assumed that the each coordinate depends only on one
index. If this is not the case, then matrix I must be provided.
Input:
s: structure created by divand_background
xi: coordinates of observations*
x: coordinates of grid*
lambda: signal-to-noise ratio of observations
I (optional): fractional indexes of location of observation
within the grid
Output:
s: structure to be used by divand_factorize
Note:
*these parameters can either be specified as a cell
array of all dimenions:
xi = {Xi,Yi,Zi}
or as n+1 dimensional array
Package: divand
