# 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 =4;
end
% There are a total of 3 entries in each of the rate and state variable arrays.
% There are a total of 17 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 (hour)');
LEGEND_ALGEBRAIC(:,1) = strpad('Qv in component v (per_second)');
LEGEND_STATES(:,1) = strpad('Vv in component v (mV)');
LEGEND_CONSTANTS(:,1) = strpad('tau_v in component v (second)');
LEGEND_CONSTANTS(:,2) = strpad('v_vm in component v (mV_second)');
LEGEND_ALGEBRAIC(:,2) = strpad('Qm in component m (per_second)');
LEGEND_CONSTANTS(:,3) = strpad('Qmax in component model_parameters (per_second)');
LEGEND_ALGEBRAIC(:,4) = strpad('D in component D (mV)');
LEGEND_CONSTANTS(:,4) = strpad('theta in component model_parameters (mV)');
LEGEND_CONSTANTS(:,5) = strpad('sigma in component model_parameters (mV)');
LEGEND_CONSTANTS(:,17) = strpad('Qa in component a (per_second)');
LEGEND_CONSTANTS(:,15) = strpad('Va in component a (mV)');
LEGEND_CONSTANTS(:,6) = strpad('Vao in component a (mV)');
LEGEND_STATES(:,2) = strpad('Vm in component m (mV)');
LEGEND_CONSTANTS(:,7) = strpad('tau_m in component m (second)');
LEGEND_CONSTANTS(:,8) = strpad('v_mv in component m (mV_second)');
LEGEND_CONSTANTS(:,9) = strpad('v_maQao in component m (mV)');
LEGEND_STATES(:,3) = strpad('H in component H (nM)');
LEGEND_CONSTANTS(:,10) = strpad('chi in component H (hour)');
LEGEND_CONSTANTS(:,11) = strpad('mu in component H (nM_second)');
LEGEND_ALGEBRAIC(:,3) = strpad('C in component D (dimensionless)');
LEGEND_CONSTANTS(:,12) = strpad('c0 in component D (dimensionless)');
LEGEND_CONSTANTS(:,16) = strpad('omega in component D (per_hour)');
LEGEND_CONSTANTS(:,13) = strpad('v_vc in component D (mV)');
LEGEND_CONSTANTS(:,14) = strpad('v_vh in component D (mV_per_nM)');
LEGEND_RATES(:,1) = strpad('d/dt Vv in component v (mV)');
LEGEND_RATES(:,2) = strpad('d/dt Vm in component m (mV)');
LEGEND_RATES(:,3) = strpad('d/dt H in component H (nM)');
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;
CONSTANTS(:,1) = 10.0;
CONSTANTS(:,2) = -1.9;
CONSTANTS(:,3) = 100.0;
CONSTANTS(:,4) = 10.0;
CONSTANTS(:,5) = 3.0;
CONSTANTS(:,6) = 1.0;
STATES(:,2) = 0.0;
CONSTANTS(:,7) = 10.0;
CONSTANTS(:,8) = -1.9;
CONSTANTS(:,9) = 1.0;
STATES(:,3) = 15.0;
CONSTANTS(:,10) = 10.8;
CONSTANTS(:,11) = 3.6;
CONSTANTS(:,12) = 1.0;
CONSTANTS(:,13) = -6.3;
CONSTANTS(:,14) = 0.19;
CONSTANTS(:,15) = CONSTANTS(:,6);
CONSTANTS(:,16) = ( 2.00000.* pi)./24.0000;
CONSTANTS(:,17) = CONSTANTS(:,3)./(1.00000+exp( - (CONSTANTS(:,15) - CONSTANTS(:,4))./CONSTANTS(:,5)));
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
ALGEBRAIC(:,1) = CONSTANTS(:,3)./(1.00000+exp( - (STATES(:,1) - CONSTANTS(:,4))./CONSTANTS(:,5)));
RATES(:,2) = ((CONSTANTS(:,9)+ CONSTANTS(:,8).*ALGEBRAIC(:,1)) - STATES(:,2))./(CONSTANTS(:,7)./3600.00);
ALGEBRAIC(:,2) = CONSTANTS(:,3)./(1.00000+exp( - (STATES(:,2) - CONSTANTS(:,4))./CONSTANTS(:,5)));
RATES(:,3) = ( CONSTANTS(:,11).*ALGEBRAIC(:,2) - STATES(:,3))./CONSTANTS(:,10);
ALGEBRAIC(:,3) = CONSTANTS(:,12)+cos( CONSTANTS(:,16).*VOI);
ALGEBRAIC(:,4) =  CONSTANTS(:,13).*ALGEBRAIC(:,3)+ CONSTANTS(:,14).*STATES(:,3);
RATES(:,1) = (( CONSTANTS(:,2).*ALGEBRAIC(:,2)+ALGEBRAIC(:,4)) - STATES(:,1))./(CONSTANTS(:,1)./3600.00);
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
ALGEBRAIC(:,1) = CONSTANTS(:,3)./(1.00000+exp( - (STATES(:,1) - CONSTANTS(:,4))./CONSTANTS(:,5)));
ALGEBRAIC(:,2) = CONSTANTS(:,3)./(1.00000+exp( - (STATES(:,2) - CONSTANTS(:,4))./CONSTANTS(:,5)));
ALGEBRAIC(:,3) = CONSTANTS(:,12)+cos( CONSTANTS(:,16).*VOI);
ALGEBRAIC(:,4) =  CONSTANTS(:,13).*ALGEBRAIC(:,3)+ CONSTANTS(:,14).*STATES(:,3);
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 Phillips 2007 at changeset bd4ea8932605.
Collaboration
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