# Generated Code

The following is matlab code generated by the CellML API from this CellML file. (Back to language selection)

The raw code is available.

```function [VOI, STATES, ALGEBRAIC, CONSTANTS] = mainFunction()
% This is the "main function".  In Matlab, things work best if you rename this function to match the filename.
[VOI, STATES, ALGEBRAIC, CONSTANTS] = solveModel();
end

function [algebraicVariableCount] = getAlgebraicVariableCount()
% Used later when setting a global variable with the number of algebraic variables.
% Note: This is not the "main method".
algebraicVariableCount =0;
end
% There are a total of 3 entries in each of the rate and state variable arrays.
% There are a total of 13 entries in the constant variable array.
%

function [VOI, STATES, ALGEBRAIC, CONSTANTS] = solveModel()
% Create ALGEBRAIC of correct size
global algebraicVariableCount;  algebraicVariableCount = getAlgebraicVariableCount();
% Initialise constants and state variables
[INIT_STATES, CONSTANTS] = initConsts;

% Set timespan to solve over
tspan = [0, 10];

% Set numerical accuracy options for ODE solver
options = odeset('RelTol', 1e-06, 'AbsTol', 1e-06, 'MaxStep', 1);

% Solve model with ODE solver
[VOI, STATES] = ode15s(@(VOI, STATES)computeRates(VOI, STATES, CONSTANTS), tspan, INIT_STATES, options);

% Compute algebraic variables
[RATES, ALGEBRAIC] = computeRates(VOI, STATES, CONSTANTS);
ALGEBRAIC = computeAlgebraic(ALGEBRAIC, CONSTANTS, STATES, VOI);

% Plot state variables against variable of integration
[LEGEND_STATES, LEGEND_ALGEBRAIC, LEGEND_VOI, LEGEND_CONSTANTS] = createLegends();
figure();
plot(VOI, STATES);
xlabel(LEGEND_VOI);
l = legend(LEGEND_STATES);
set(l,'Interpreter','none');
end

function [LEGEND_STATES, LEGEND_ALGEBRAIC, LEGEND_VOI, LEGEND_CONSTANTS] = createLegends()
LEGEND_STATES = ''; LEGEND_ALGEBRAIC = ''; LEGEND_VOI = ''; LEGEND_CONSTANTS = '';
LEGEND_VOI = strpad('time in component environment (s)');
LEGEND_STATES(:,1) = strpad('P in component P (dimensionless)');
LEGEND_STATES(:,2) = strpad('Q in component Q (dimensionless)');
LEGEND_CONSTANTS(:,1) = strpad('a in component P (per_s)');
LEGEND_CONSTANTS(:,2) = strpad('b in component P (per_s)');
LEGEND_CONSTANTS(:,3) = strpad('K in component P (dimensionless)');
LEGEND_CONSTANTS(:,12) = strpad('P_star in component P_star (dimensionless)');
LEGEND_CONSTANTS(:,4) = strpad('V_3 in component R (per_s)');
LEGEND_CONSTANTS(:,5) = strpad('V_4 in component R (per_s)');
LEGEND_CONSTANTS(:,6) = strpad('K_3 in component R (dimensionless)');
LEGEND_CONSTANTS(:,7) = strpad('K_4 in component R (dimensionless)');
LEGEND_STATES(:,3) = strpad('R in component R (dimensionless)');
LEGEND_CONSTANTS(:,8) = strpad('V_1 in component Q (per_s)');
LEGEND_CONSTANTS(:,9) = strpad('V_2 in component Q (per_s)');
LEGEND_CONSTANTS(:,10) = strpad('K_1 in component Q (dimensionless)');
LEGEND_CONSTANTS(:,11) = strpad('K_2 in component Q (dimensionless)');
LEGEND_CONSTANTS(:,13) = strpad('R_star in component R_star (dimensionless)');
LEGEND_RATES(:,1) = strpad('d/dt P in component P (dimensionless)');
LEGEND_RATES(:,2) = strpad('d/dt Q in component Q (dimensionless)');
LEGEND_RATES(:,3) = strpad('d/dt R in component R (dimensionless)');
LEGEND_STATES  = LEGEND_STATES';
LEGEND_ALGEBRAIC = LEGEND_ALGEBRAIC';
LEGEND_RATES = LEGEND_RATES';
LEGEND_CONSTANTS = LEGEND_CONSTANTS';
end

function [STATES, CONSTANTS] = initConsts()
VOI = 0; CONSTANTS = []; STATES = []; ALGEBRAIC = [];
STATES(:,1) = 0.0;
STATES(:,2) = 0.0;
CONSTANTS(:,1) = 0.1;
CONSTANTS(:,2) = 0.1;
CONSTANTS(:,3) = 0.2;
CONSTANTS(:,4) = 6;
CONSTANTS(:,5) = 2.5;
CONSTANTS(:,6) = 0.01;
CONSTANTS(:,7) = 0.01;
STATES(:,3) = 0.0;
CONSTANTS(:,8) = 1;
CONSTANTS(:,9) = 1.5;
CONSTANTS(:,10) = 0.01;
CONSTANTS(:,11) = 0.01;
CONSTANTS(:,12) =  (CONSTANTS(:,5)./CONSTANTS(:,4)).*((1.00000+ 2.00000.*CONSTANTS(:,6))./(1.00000+ 2.00000.*CONSTANTS(:,7)));
CONSTANTS(:,13) =  (CONSTANTS(:,8)./CONSTANTS(:,9)).*((1.00000+ 2.00000.*CONSTANTS(:,11))./(1.00000+ 2.00000.*CONSTANTS(:,10)));
if (isempty(STATES)), warning('Initial values for states not set');, end
end

function [RATES, ALGEBRAIC] = computeRates(VOI, STATES, CONSTANTS)
global algebraicVariableCount;
statesSize = size(STATES);
statesColumnCount = statesSize(2);
if ( statesColumnCount == 1)
STATES = STATES';
ALGEBRAIC = zeros(1, algebraicVariableCount);
utilOnes = 1;
else
statesRowCount = statesSize(1);
ALGEBRAIC = zeros(statesRowCount, algebraicVariableCount);
RATES = zeros(statesRowCount, statesColumnCount);
utilOnes = ones(statesRowCount, 1);
end
RATES(:,1) =  CONSTANTS(:,1).*STATES(:,2) -  CONSTANTS(:,2).*(STATES(:,1)./(CONSTANTS(:,3)+STATES(:,1)));
RATES(:,2) =  CONSTANTS(:,8).*((1.00000 - STATES(:,2))./(CONSTANTS(:,10)+(1.00000 - STATES(:,2)))) -  CONSTANTS(:,9).*STATES(:,3).*(STATES(:,2)./(CONSTANTS(:,11)+STATES(:,2)));
RATES(:,3) =  STATES(:,1).*CONSTANTS(:,4).*((1.00000 - STATES(:,3))./(CONSTANTS(:,6)+(1.00000 - STATES(:,3)))) -  CONSTANTS(:,5).*(STATES(:,3)./(CONSTANTS(:,7)+STATES(:,3)));
RATES = RATES';
end

% Calculate algebraic variables
function ALGEBRAIC = computeAlgebraic(ALGEBRAIC, CONSTANTS, STATES, VOI)
statesSize = size(STATES);
statesColumnCount = statesSize(2);
if ( statesColumnCount == 1)
STATES = STATES';
utilOnes = 1;
else
statesRowCount = statesSize(1);
utilOnes = ones(statesRowCount, 1);
end
end

% Pad out or shorten strings to a set length
req_length = 160;
insize = size(strin,2);
if insize > req_length
strout = strin(1:req_length);
else
strout = [strin, blanks(req_length - insize)];
end
end

```
Source
Derived from workspace Goldbeter 2006 at changeset e51f2a391286.
Collaboration
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