function spvF=yspSlvfmhvI(x)
# computed a sparse fransfer matrix of the first order analysis for 
# a three-hinged frame (Sign Convention 2)
#
##=========================================================================
## This Program is written by Andres Lahe,    2009-02-13
##                    e-mail: andres.lahe@ttu.ee
## LAST MODIFIED: Andres Lahe,    2010-08-13
## Copyright (c)  2009  by Tallinn University of Technology 
##                Department of Mechanics
##                http://www.ttu.ee/
##
## This program is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License
## as published by the Free Software Foundation; either version 2
## of the License, or (at your option) any later version.

## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.

## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
## http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
##=========================================================================
#
spvF=sparse(3,6);
spvI=speye(3);
spvF=spInsertBtoA(spvF,1,1,spvI);
spvU1=yspSlfhlin(x);   #%  spvU1=ysplfhlin(baasi0,x,EA,GAr,EJ);
spvU=spvU1.*(-1);
spvF=spInsertBtoA(spvF,1,4,spvU);
#
endfunction

