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 =7;
end
% There are a total of 3 entries in each of the rate and state variable arrays.
% There are a total of 16 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 (millisecond)');
LEGEND_STATES(:,1) = strpad('V in component membrane (millivolt)');
LEGEND_CONSTANTS(:,1) = strpad('tau in component membrane (millisecond)');
LEGEND_ALGEBRAIC(:,5) = strpad('i_K in component potassium_current (picoA)');
LEGEND_ALGEBRAIC(:,7) = strpad('i_K_ATP in component ATP_sensitive_potassium_current (picoA)');
LEGEND_ALGEBRAIC(:,4) = strpad('i_Ca in component calcium_current (picoA)');
LEGEND_ALGEBRAIC(:,6) = strpad('i_s in component slow_current (picoA)');
LEGEND_CONSTANTS(:,2) = strpad('g_Ca in component calcium_current (nanoS)');
LEGEND_CONSTANTS(:,3) = strpad('V_Ca in component calcium_current (millivolt)');
LEGEND_ALGEBRAIC(:,1) = strpad('m_infinity in component calcium_current_m_gate (dimensionless)');
LEGEND_CONSTANTS(:,4) = strpad('V_m in component calcium_current_m_gate (millivolt)');
LEGEND_CONSTANTS(:,5) = strpad('theta_m in component calcium_current_m_gate (millivolt)');
LEGEND_CONSTANTS(:,6) = strpad('V_K in component potassium_current (millivolt)');
LEGEND_CONSTANTS(:,7) = strpad('g_K in component potassium_current (nanoS)');
LEGEND_STATES(:,2) = strpad('n in component potassium_current_n_gate (dimensionless)');
LEGEND_ALGEBRAIC(:,2) = strpad('n_infinity in component potassium_current_n_gate (dimensionless)');
LEGEND_CONSTANTS(:,8) = strpad('V_n in component potassium_current_n_gate (millivolt)');
LEGEND_CONSTANTS(:,9) = strpad('theta_n in component potassium_current_n_gate (millivolt)');
LEGEND_CONSTANTS(:,10) = strpad('lambda in component potassium_current_n_gate (dimensionless)');
LEGEND_CONSTANTS(:,11) = strpad('g_s in component slow_current (nanoS)');
LEGEND_STATES(:,3) = strpad('s in component slow_current_s_gate (dimensionless)');
LEGEND_ALGEBRAIC(:,3) = strpad('s_infinity in component slow_current_s_gate (dimensionless)');
LEGEND_CONSTANTS(:,12) = strpad('V_s in component slow_current_s_gate (millivolt)');
LEGEND_CONSTANTS(:,13) = strpad('theta_s in component slow_current_s_gate (millivolt)');
LEGEND_CONSTANTS(:,14) = strpad('tau_s in component slow_current_s_gate (millisecond)');
LEGEND_CONSTANTS(:,15) = strpad('g_K_ATP in component ATP_sensitive_potassium_current (nanoS)');
LEGEND_CONSTANTS(:,16) = strpad('p in component ATP_sensitive_potassium_current (dimensionless)');
LEGEND_RATES(:,1) = strpad('d/dt V in component membrane (millivolt)');
LEGEND_RATES(:,2) = strpad('d/dt n in component potassium_current_n_gate (dimensionless)');
LEGEND_RATES(:,3) = strpad('d/dt s in component slow_current_s_gate (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) = -64.0;
CONSTANTS(:,1) = 20.0;
CONSTANTS(:,2) = 3.6;
CONSTANTS(:,3) = 25.0;
CONSTANTS(:,4) = -20.0;
CONSTANTS(:,5) = 12.0;
CONSTANTS(:,6) = -75.0;
CONSTANTS(:,7) = 10.0;
STATES(:,2) = 0.01;
CONSTANTS(:,8) = -17.0;
CONSTANTS(:,9) = 5.6;
CONSTANTS(:,10) = 0.9;
CONSTANTS(:,11) = 4.0;
STATES(:,3) = 0.01;
CONSTANTS(:,12) = -22.0;
CONSTANTS(:,13) = 8.0;
CONSTANTS(:,14) = 20000.0;
CONSTANTS(:,15) = 1.2;
CONSTANTS(:,16) = 0.5;
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(:,2) = 1.00000./(1.00000+exp((CONSTANTS(:,8) - STATES(:,1))./CONSTANTS(:,9)));
RATES(:,2) = ( CONSTANTS(:,10).*(ALGEBRAIC(:,2) - STATES(:,2)))./CONSTANTS(:,1);
ALGEBRAIC(:,3) = 1.00000./(1.00000+exp((CONSTANTS(:,12) - STATES(:,1))./CONSTANTS(:,13)));
RATES(:,3) = (ALGEBRAIC(:,3) - STATES(:,3))./CONSTANTS(:,14);
ALGEBRAIC(:,5) = CONSTANTS(:,7).*STATES(:,2).*(STATES(:,1) - CONSTANTS(:,6));
ALGEBRAIC(:,7) = CONSTANTS(:,15).*CONSTANTS(:,16).*(STATES(:,1) - CONSTANTS(:,6));
ALGEBRAIC(:,1) = 1.00000./(1.00000+exp((CONSTANTS(:,4) - STATES(:,1))./CONSTANTS(:,5)));
ALGEBRAIC(:,4) = CONSTANTS(:,2).*ALGEBRAIC(:,1).*(STATES(:,1) - CONSTANTS(:,3));
ALGEBRAIC(:,6) = CONSTANTS(:,11).*STATES(:,3).*(STATES(:,1) - CONSTANTS(:,6));
RATES(:,1) = - (ALGEBRAIC(:,4)+ALGEBRAIC(:,5)+ALGEBRAIC(:,7)+ALGEBRAIC(:,6))./CONSTANTS(:,1);
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(:,2) = 1.00000./(1.00000+exp((CONSTANTS(:,8) - STATES(:,1))./CONSTANTS(:,9)));
ALGEBRAIC(:,3) = 1.00000./(1.00000+exp((CONSTANTS(:,12) - STATES(:,1))./CONSTANTS(:,13)));
ALGEBRAIC(:,5) = CONSTANTS(:,7).*STATES(:,2).*(STATES(:,1) - CONSTANTS(:,6));
ALGEBRAIC(:,7) = CONSTANTS(:,15).*CONSTANTS(:,16).*(STATES(:,1) - CONSTANTS(:,6));
ALGEBRAIC(:,1) = 1.00000./(1.00000+exp((CONSTANTS(:,4) - STATES(:,1))./CONSTANTS(:,5)));
ALGEBRAIC(:,4) = CONSTANTS(:,2).*ALGEBRAIC(:,1).*(STATES(:,1) - CONSTANTS(:,3));
ALGEBRAIC(:,6) = CONSTANTS(:,11).*STATES(:,3).*(STATES(:,1) - CONSTANTS(:,6));
end
% Pad out or shorten strings to a set length
function strout = strpad(strin)
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