= Implementation of the analysis step =

The implementation of the analysis step requires that the user-supplied routines whose names are given in the call to the filter-specific put-state routine are implemented with full functionality. 

Several of the routines are general and hence usable for all filter algorithms. There are some differences between local (LSEIK and LETKF) and global filters (SEIK, SEEK, EnKF, ETKF). The routines are described in separate pages for each filter algorithm. The general routines will be pedeated, but they are marked to be general.

Filter-specific implementations:
 * [ImplementAnalysisseik Implementation of the analysis for SEIK]