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Comment:Read the simpar file now.
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SHA3-256: 28a732ebddf1cd11bc91758bacb6fa79e151c11d692a660cbb32d8b1a4892a6c
User & Date: gawthrop@users.sourceforge.net on 1998-05-19 19:48:02
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Context
1998-05-20
15:13:09
Writes out algebraic equations (if any). check-in: 3f82cb70ab user: gawthrop@users.sourceforge.net tags: origin/master, trunk
1998-05-19
19:48:02
Read the simpar file now. check-in: 28a732ebdd user: gawthrop@users.sourceforge.net tags: origin/master, trunk
19:47:37
Updated the odesso representation to use simpar file. check-in: eda3314a90 user: gawthrop@users.sourceforge.net tags: origin/master, trunk
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Modified mttroot/mtt/bin/trans/ode2odes_m from [ee275a282c] to [d0d67d2e69].

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# Copyright (c) P.J.Gawthrop, 1996.

###############################################################
## Version control history
###############################################################
## $Id$
## $Log$
## Revision 1.13  1998/05/14 08:05:10  peterg
## Put back under RCS
##
## Revision 1.12  1998/02/25 18:02:39  peterg
## Removed the argument passing stuff .
## Replaced by the simpar.m method.
##
## Revision 1.11  1997/08/29 07:56:54  peterg
## Minor updates
##
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  %Read in parameters
  $1_numpar; 
 
  %Read in state
  x = $1_state;

  %Set the initial output
  if ny>0
    y = $1_odeo(x,0);
  end; 
  %if ny>0
  %  y = $1_odeo(x,0);
  %end; 
 
  %Read in simulation parameters
  $1_simpar;
  T = [0:DT:LAST];

  t=0;	%Just in case it appears in the parameter list.


  %Defaults
  if exist('T')==0
    T=[0:1:100]
  end;

  if exist('METHOD')==0
    METHOD = 'Euler'
  end;

 % if exist('x0')==0
 %   % x0 = zeros(nx,1);
  if exist('x')==0
    x = zeros(nx,1);
 %   x0 = x;
 %  end;
   end;

  [n,m]=size(T);
  if m>n
    T=T';
  end;

method = tolower(METHOD)

if nx>0
  if strcmp(method,'lsode')
%  x = lsode('$1_ode', x0, T);

%Euler integration
    X = lsode('$1_ode', x, T);
  elseif strcmp(method,'euler')
    %Euler integration
%  x = x0;
  X=[]; Y=[];
  dt = (T(2)-T(1))/STEPFACTOR;
    X=[];
    dt = (T(2)-T(1))/STEPFACTOR;

  for t=T'
    X = [X; x'];
    for t=T'
      X = [X; x'];
    Y = [Y; y'];
    ts = t;
    for i=1:STEPFACTOR
      dx = $1_ode(x,ts);
      ts = ts + dt;
      x = x + dx*dt;
      ts = t;
      for i=1:STEPFACTOR
        dx = $1_ode(x,ts);
        ts = ts + dt;
        x = x + dx*dt;
      if ny>0
        y = $1_odeo(x,ts);
      end;
    end;
  else
    error('Method %s not available here', METHOD);
    return;
  end;

  write_matrix([T,X], '$1_odes');
else
  X = zeros(size(T));
end;

if ny>0
if ny>0 % compute y and print it
  i = 0; Y=[];
  for t=T'
    i = i+1;
    y = $1_odeo(X(i,:),t);
    Y = [Y; y'];
  end;
  write_matrix([T,Y], '$1_odeso');
end;


EOF

# Now invoke the standard error handling.
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MTT: Model Transformation Tools
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