+ Use scalar product when possible, ie replace sum(x.*x) by x'*x,
+ Add parenthesis around scalar products, ie replace a*x'*x by a*(x'*x),
+ Removed global options_ in lnsrch1 (only used for solve_tolx).
Note that the scalar products could be replaced by a loop for small
problems. If the number of unknow is smaller than 70 the loop is
faster (10 times faster if the number of unknowns is less than 10).
Octave BiCGStab algorithm involves a 0 division in case of a preconditioner equal to the LU decomposition of the A matrix (in a linear system of the form A.x = b).
- The solution:
Checks if the linear system is solved simply using: x_new = x_old + U \ (L \ x_old)
Ticket #11
* fix options stack_solve_algo={2,3,4} (closes#68)
* fix crashes for singular normalizations (closes#44) and implement decreasing cutoff
* fail for stack_solve_algo=2 under Octave (because there is no gmres function in Octave)
git-svn-id: https://www.dynare.org/svn/dynare/trunk@3279 ac1d8469-bf42-47a9-8791-bf33cf982152
* Added solve_algo=5 for steady
* Remove obsolete method option of simul
* Added various checks to avoid unimplemented combinations of bytecode/block/solve_algo/stack_solve_algo
git-svn-id: https://www.dynare.org/svn/dynare/trunk@2882 ac1d8469-bf42-47a9-8791-bf33cf982152
- mfs: new option for 'steady' and 'model' commands. Determines the equation belonging to the set of feedback variables.
mfs = 0 => all variables are considered as feedback variables (default value)
mfs = 1 => using only naturally normalized equation as potential recursive equations (all variables assigned to unnormalized equations are considered as feedback variable)
mfs = 2 => adding to the set of potential recursive equation with mfs = 1 the linear equation in endogenous variable normalized (all variables assigned to nonlinear unnormalized equations are considered as feedback variable)
mfs = 3 => adding to the set of potential recursive equation with mfs = 2 the non linear equation in endogenous variable normalized
- correction of few buggs in simulate.dll
- block_mfs_dll: new option for 'steady' command. Use simulate.dll to solve the steady state model (speedup the computation of the steady-state and the homotopy)
git-svn-id: https://www.dynare.org/svn/dynare/trunk@2866 ac1d8469-bf42-47a9-8791-bf33cf982152
- normalize an equation linear in its endogenous variable
- Chained rule derivatives (necessary to reduce a block to the feedback equations and variables)
git-svn-id: https://www.dynare.org/svn/dynare/trunk@2726 ac1d8469-bf42-47a9-8791-bf33cf982152
Sébastien Villemot
Stéphane Adjemian (Scylla)
Houtan Bastani
Ferhat Mihoubi
Sébastien Villemot
Michel Juillard
sebastien
ferhat