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 =19;
end
% There are a total of 7 entries in each of the rate and state variable arrays.
% There are a total of 42 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('F6P in component F6P (mM)');
LEGEND_ALGEBRAIC(:,1) = strpad('V_hk in component V_hk (mM_per_s)');
LEGEND_ALGEBRAIC(:,13) = strpad('V_pfk in component V_pfk (mM_per_s)');
LEGEND_ALGEBRAIC(:,19) = strpad('V_pfk2 in component V_pfk2 (mM_per_s)');
LEGEND_STATES(:,2) = strpad('F26P in component F26P (mM)');
LEGEND_STATES(:,3) = strpad('GAP in component GAP (mM)');
LEGEND_ALGEBRAIC(:,11) = strpad('V_pk in component V_pk (mM_per_s)');
LEGEND_STATES(:,4) = strpad('PYR in component PYR (mM)');
LEGEND_ALGEBRAIC(:,2) = strpad('V_ldh in component V_ldh (mM_per_s)');
LEGEND_ALGEBRAIC(:,6) = strpad('V_op in component V_op (mM_per_s)');
LEGEND_STATES(:,5) = strpad('LAC in component LAC (mM)');
LEGEND_ALGEBRAIC(:,17) = strpad('V_lac in component V_lac (mM_per_s)');
LEGEND_STATES(:,6) = strpad('ATP in component ATP (mM)');
LEGEND_ALGEBRAIC(:,16) = strpad('V_ATPase in component V_ATPase (mM_per_s)');
LEGEND_ALGEBRAIC(:,7) = strpad('V_ck in component V_ck (mM_per_s)');
LEGEND_ALGEBRAIC(:,8) = strpad('dAMP_dATP in component dAMP_dATP (dimensionless)');
LEGEND_STATES(:,7) = strpad('PCr in component PCr (mM)');
LEGEND_CONSTANTS(:,1) = strpad('Vmax_hk in component V_hk (mM_per_s)');
LEGEND_CONSTANTS(:,2) = strpad('Km_ATP_hk in component V_hk (mM)');
LEGEND_CONSTANTS(:,3) = strpad('KI_F6P in component V_hk (mM)');
LEGEND_CONSTANTS(:,4) = strpad('Vmax_pfk in component V_pfk (mM_per_s)');
LEGEND_CONSTANTS(:,5) = strpad('Km_ATP_pfk in component V_pfk (mM)');
LEGEND_CONSTANTS(:,6) = strpad('Km_F6P_pfk in component V_pfk (mM)');
LEGEND_CONSTANTS(:,7) = strpad('Km_F26P_pfk in component V_pfk (mM)');
LEGEND_ALGEBRAIC(:,12) = strpad('AMP_act in component AMP_act (dimensionless)');
LEGEND_ALGEBRAIC(:,10) = strpad('ATP_inh in component ATP_inh (dimensionless)');
LEGEND_CONSTANTS(:,8) = strpad('Vmaxf_pfk2 in component V_pfk2 (mM_per_s)');
LEGEND_CONSTANTS(:,9) = strpad('Vmaxr_pfk2 in component V_pfk2 (mM_per_s)');
LEGEND_CONSTANTS(:,10) = strpad('Km_ATP_pfk2 in component V_pfk2 (mM)');
LEGEND_CONSTANTS(:,11) = strpad('Km_F6P_pfk2 in component V_pfk2 (mM)');
LEGEND_CONSTANTS(:,12) = strpad('Km_F26P_pfk2 in component V_pfk2 (mM)');
LEGEND_ALGEBRAIC(:,18) = strpad('AMP_pfk2 in component AMP_pfk2 (dimensionless)');
LEGEND_CONSTANTS(:,13) = strpad('Vmax_pk in component V_pk (mM_per_s)');
LEGEND_CONSTANTS(:,14) = strpad('Km_ADP_pk in component V_pk (mM)');
LEGEND_CONSTANTS(:,15) = strpad('Km_GAP_pk in component V_pk (mM)');
LEGEND_ALGEBRAIC(:,5) = strpad('ADP in component ADP (mM)');
LEGEND_CONSTANTS(:,16) = strpad('Vmax_op in component V_op (mM_per_s)');
LEGEND_CONSTANTS(:,17) = strpad('Km_ADP_op in component V_op (mM)');
LEGEND_CONSTANTS(:,18) = strpad('Km_PYR_op in component V_op (mM)');
LEGEND_CONSTANTS(:,19) = strpad('kf_ldh in component V_ldh (per_s)');
LEGEND_CONSTANTS(:,20) = strpad('kr_ldh in component V_ldh (per_s)');
LEGEND_CONSTANTS(:,21) = strpad('kf_ck in component V_ck (per_mM_s)');
LEGEND_CONSTANTS(:,22) = strpad('kr_ck in component V_ck (per_mM_s)');
LEGEND_ALGEBRAIC(:,3) = strpad('Cr in component Cr (mM)');
LEGEND_CONSTANTS(:,23) = strpad('PCrtot in component Cr (mM)');
LEGEND_CONSTANTS(:,24) = strpad('Vmax_ATPase in component V_ATPase (mM_per_s)');
LEGEND_CONSTANTS(:,25) = strpad('Km_ATP in component V_ATPase (mM)');
LEGEND_ALGEBRAIC(:,15) = strpad('v_stim in component v_stim (dimensionless)');
LEGEND_CONSTANTS(:,26) = strpad('Vlac_0 in component V_lac (mM_per_s)');
LEGEND_CONSTANTS(:,27) = strpad('K_LAC_eff in component V_lac (per_s)');
LEGEND_CONSTANTS(:,28) = strpad('K_LAC in component V_lac (dimensionless)');
LEGEND_ALGEBRAIC(:,4) = strpad('u in component ADP (dimensionless)');
LEGEND_CONSTANTS(:,29) = strpad('ANP in component model_parameters (mM)');
LEGEND_CONSTANTS(:,30) = strpad('Q_adk in component model_parameters (dimensionless)');
LEGEND_ALGEBRAIC(:,9) = strpad('AMP in component AMP (mM)');
LEGEND_CONSTANTS(:,31) = strpad('nATP in component ATP_inh (dimensionless)');
LEGEND_CONSTANTS(:,32) = strpad('KI_ATP in component ATP_inh (mM)');
LEGEND_CONSTANTS(:,33) = strpad('nAMP in component AMP_act (dimensionless)');
LEGEND_CONSTANTS(:,34) = strpad('Ka_AMP in component AMP_act (mM)');
LEGEND_ALGEBRAIC(:,14) = strpad('unitpulseSB in component v_stim (dimensionless)');
LEGEND_CONSTANTS(:,35) = strpad('stim in component v_stim (dimensionless)');
LEGEND_CONSTANTS(:,36) = strpad('to in component v_stim (s)');
LEGEND_CONSTANTS(:,37) = strpad('tend in component v_stim (s)');
LEGEND_CONSTANTS(:,38) = strpad('v1_n in component v_stim (dimensionless)');
LEGEND_CONSTANTS(:,39) = strpad('v2_n in component v_stim (dimensionless)');
LEGEND_CONSTANTS(:,40) = strpad('t_n_stim in component v_stim (s)');
LEGEND_CONSTANTS(:,41) = strpad('Kamp_pfk2 in component AMP_pfk2 (mM)');
LEGEND_CONSTANTS(:,42) = strpad('nh_amp in component AMP_pfk2 (dimensionless)');
LEGEND_RATES(:,1) = strpad('d/dt F6P in component F6P (mM)');
LEGEND_RATES(:,2) = strpad('d/dt F26P in component F26P (mM)');
LEGEND_RATES(:,3) = strpad('d/dt GAP in component GAP (mM)');
LEGEND_RATES(:,4) = strpad('d/dt PYR in component PYR (mM)');
LEGEND_RATES(:,5) = strpad('d/dt LAC in component LAC (mM)');
LEGEND_RATES(:,6) = strpad('d/dt ATP in component ATP (mM)');
LEGEND_RATES(:,7) = strpad('d/dt PCr in component PCr (mM)');
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) = 0.2;
STATES(:,2) = 0.001;
STATES(:,3) = 0.0405;
STATES(:,4) = 0.1;
STATES(:,5) = 0.5;
STATES(:,6) = 2.402;
STATES(:,7) = 18.14;
CONSTANTS(:,1) = 2.5;
CONSTANTS(:,2) = 0.5;
CONSTANTS(:,3) = 0.068;
CONSTANTS(:,4) = 3.85;
CONSTANTS(:,5) = 0.05;
CONSTANTS(:,6) = 0.18;
CONSTANTS(:,7) = 0.01;
CONSTANTS(:,8) = 2e-04;
CONSTANTS(:,9) = 1.036e-04;
CONSTANTS(:,10) = 0.05;
CONSTANTS(:,11) = 0.01;
CONSTANTS(:,12) = 0.0001;
CONSTANTS(:,13) = 5.0;
CONSTANTS(:,14) = 0.005;
CONSTANTS(:,15) = 0.4;
CONSTANTS(:,16) = 1.0;
CONSTANTS(:,17) = 0.005;
CONSTANTS(:,18) = 0.5;
CONSTANTS(:,19) = 0;
CONSTANTS(:,20) = 0;
CONSTANTS(:,21) = 3.0;
CONSTANTS(:,22) = 1.26;
CONSTANTS(:,23) = 20.0;
CONSTANTS(:,24) = 0.9355;
CONSTANTS(:,25) = 0.5;
CONSTANTS(:,26) = 0.355;
CONSTANTS(:,27) = 0.71;
CONSTANTS(:,28) = 0.641;
CONSTANTS(:,29) = 2.51;
CONSTANTS(:,30) = 0.92;
CONSTANTS(:,31) = 0.4;
CONSTANTS(:,32) = 1.0;
CONSTANTS(:,33) = 0.5;
CONSTANTS(:,34) = 0.05;
CONSTANTS(:,35) = 1;
CONSTANTS(:,36) = 50;
CONSTANTS(:,37) = 200;
CONSTANTS(:,38) = 0.5;
CONSTANTS(:,39) = 0.0;
CONSTANTS(:,40) = 2;
CONSTANTS(:,41) = 0.005;
CONSTANTS(:,42) = 2;
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(:,4) = power(CONSTANTS(:,30), 2.00000)+ 4.00000.*CONSTANTS(:,30).*(CONSTANTS(:,29)./STATES(:,6) - 1.00000);
ALGEBRAIC(:,5) = (STATES(:,6)./2.00000).*( - CONSTANTS(:,30)+power(ALGEBRAIC(:,4), 1.0 ./ 2));
ALGEBRAIC(:,3) = CONSTANTS(:,23) - STATES(:,7);
ALGEBRAIC(:,7) = CONSTANTS(:,21).*STATES(:,7).*ALGEBRAIC(:,5) - CONSTANTS(:,22).*ALGEBRAIC(:,3).*STATES(:,6);
RATES(:,7) = - ALGEBRAIC(:,7);
ALGEBRAIC(:,10) = power((1.00000+ CONSTANTS(:,31).*(STATES(:,6)./CONSTANTS(:,32)))./(1.00000+STATES(:,6)./CONSTANTS(:,32)), 4.00000);
ALGEBRAIC(:,11) = CONSTANTS(:,13).*(STATES(:,3)./(STATES(:,3)+CONSTANTS(:,15))).*(ALGEBRAIC(:,5)./(ALGEBRAIC(:,5)+CONSTANTS(:,14))).*ALGEBRAIC(:,10);
ALGEBRAIC(:,2) = CONSTANTS(:,19).*STATES(:,4) - CONSTANTS(:,20).*STATES(:,5);
ALGEBRAIC(:,6) = CONSTANTS(:,16).*(STATES(:,4)./(STATES(:,4)+CONSTANTS(:,18))).*(ALGEBRAIC(:,5)./(ALGEBRAIC(:,5)+CONSTANTS(:,17))).*(1.00000./(1.00000+ 0.100000.*(STATES(:,6)./ALGEBRAIC(:,5))));
RATES(:,4) = ALGEBRAIC(:,11) - (ALGEBRAIC(:,6)+ALGEBRAIC(:,2));
ALGEBRAIC(:,9) = CONSTANTS(:,29) - (STATES(:,6)+ALGEBRAIC(:,5));
ALGEBRAIC(:,12) = power((1.00000+ALGEBRAIC(:,9)./CONSTANTS(:,34))./(1.00000+ CONSTANTS(:,33).*(ALGEBRAIC(:,9)./CONSTANTS(:,34))), 4.00000);
ALGEBRAIC(:,13) = CONSTANTS(:,4).*(STATES(:,1)./(STATES(:,1)+CONSTANTS(:,6))).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,5))).*(STATES(:,2)./(STATES(:,2)+CONSTANTS(:,7))).*ALGEBRAIC(:,10).*ALGEBRAIC(:,12);
RATES(:,3) = 2.00000.*ALGEBRAIC(:,13) - ALGEBRAIC(:,11);
ALGEBRAIC(:,14) = piecewise({VOI>=CONSTANTS(:,36)&VOI<=CONSTANTS(:,36)+CONSTANTS(:,37), 1.00000 }, 0.00000);
ALGEBRAIC(:,15) = CONSTANTS(:,35).*(CONSTANTS(:,38)+ CONSTANTS(:,39).*((VOI - CONSTANTS(:,36))./CONSTANTS(:,40)).*exp( - ( (VOI - CONSTANTS(:,36)).*(ALGEBRAIC(:,14)./CONSTANTS(:,40))))).*ALGEBRAIC(:,14);
ALGEBRAIC(:,17) = CONSTANTS(:,26).*(1.00000+ ALGEBRAIC(:,15).*CONSTANTS(:,28)) - CONSTANTS(:,27).*STATES(:,5);
RATES(:,5) = 2.25000.*ALGEBRAIC(:,2)+ALGEBRAIC(:,17);
ALGEBRAIC(:,1) = CONSTANTS(:,1).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,2))).*power(1.00000+power(STATES(:,1)./CONSTANTS(:,3), 4.00000), -1.00000);
ALGEBRAIC(:,18) = power(ALGEBRAIC(:,9)./CONSTANTS(:,41), CONSTANTS(:,42))./(1.00000+power(ALGEBRAIC(:,9)./CONSTANTS(:,41), CONSTANTS(:,42)));
ALGEBRAIC(:,19) = CONSTANTS(:,8).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,10))).*(STATES(:,1)./(STATES(:,1)+CONSTANTS(:,11))).*ALGEBRAIC(:,18) - CONSTANTS(:,9).*(STATES(:,2)./(STATES(:,2)+CONSTANTS(:,12)));
RATES(:,1) = ALGEBRAIC(:,1) - (ALGEBRAIC(:,13) - ALGEBRAIC(:,19));
RATES(:,2) = ALGEBRAIC(:,19);
ALGEBRAIC(:,16) = CONSTANTS(:,24).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,25))).*(1.00000+ALGEBRAIC(:,15));
ALGEBRAIC(:,8) = - 1.00000+CONSTANTS(:,30)./2.00000+ - ( 0.500000.*power(ALGEBRAIC(:,4), 1.0 ./ 2))+ CONSTANTS(:,30).*(CONSTANTS(:,29)./( STATES(:,6).*power(ALGEBRAIC(:,4), 1.0 ./ 2)));
RATES(:,6) = (( 2.00000.*ALGEBRAIC(:,11)+ 15.0000.*ALGEBRAIC(:,6)+ALGEBRAIC(:,7)) - (ALGEBRAIC(:,1)+ALGEBRAIC(:,13)+ALGEBRAIC(:,19)+ALGEBRAIC(:,16))).*power(1.00000 - ALGEBRAIC(:,8), -1.00000);
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(:,4) = power(CONSTANTS(:,30), 2.00000)+ 4.00000.*CONSTANTS(:,30).*(CONSTANTS(:,29)./STATES(:,6) - 1.00000);
ALGEBRAIC(:,5) = (STATES(:,6)./2.00000).*( - CONSTANTS(:,30)+power(ALGEBRAIC(:,4), 1.0 ./ 2));
ALGEBRAIC(:,3) = CONSTANTS(:,23) - STATES(:,7);
ALGEBRAIC(:,7) = CONSTANTS(:,21).*STATES(:,7).*ALGEBRAIC(:,5) - CONSTANTS(:,22).*ALGEBRAIC(:,3).*STATES(:,6);
ALGEBRAIC(:,10) = power((1.00000+ CONSTANTS(:,31).*(STATES(:,6)./CONSTANTS(:,32)))./(1.00000+STATES(:,6)./CONSTANTS(:,32)), 4.00000);
ALGEBRAIC(:,11) = CONSTANTS(:,13).*(STATES(:,3)./(STATES(:,3)+CONSTANTS(:,15))).*(ALGEBRAIC(:,5)./(ALGEBRAIC(:,5)+CONSTANTS(:,14))).*ALGEBRAIC(:,10);
ALGEBRAIC(:,2) = CONSTANTS(:,19).*STATES(:,4) - CONSTANTS(:,20).*STATES(:,5);
ALGEBRAIC(:,6) = CONSTANTS(:,16).*(STATES(:,4)./(STATES(:,4)+CONSTANTS(:,18))).*(ALGEBRAIC(:,5)./(ALGEBRAIC(:,5)+CONSTANTS(:,17))).*(1.00000./(1.00000+ 0.100000.*(STATES(:,6)./ALGEBRAIC(:,5))));
ALGEBRAIC(:,9) = CONSTANTS(:,29) - (STATES(:,6)+ALGEBRAIC(:,5));
ALGEBRAIC(:,12) = power((1.00000+ALGEBRAIC(:,9)./CONSTANTS(:,34))./(1.00000+ CONSTANTS(:,33).*(ALGEBRAIC(:,9)./CONSTANTS(:,34))), 4.00000);
ALGEBRAIC(:,13) = CONSTANTS(:,4).*(STATES(:,1)./(STATES(:,1)+CONSTANTS(:,6))).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,5))).*(STATES(:,2)./(STATES(:,2)+CONSTANTS(:,7))).*ALGEBRAIC(:,10).*ALGEBRAIC(:,12);
ALGEBRAIC(:,14) = piecewise({VOI>=CONSTANTS(:,36)&VOI<=CONSTANTS(:,36)+CONSTANTS(:,37), 1.00000 }, 0.00000);
ALGEBRAIC(:,15) = CONSTANTS(:,35).*(CONSTANTS(:,38)+ CONSTANTS(:,39).*((VOI - CONSTANTS(:,36))./CONSTANTS(:,40)).*exp( - ( (VOI - CONSTANTS(:,36)).*(ALGEBRAIC(:,14)./CONSTANTS(:,40))))).*ALGEBRAIC(:,14);
ALGEBRAIC(:,17) = CONSTANTS(:,26).*(1.00000+ ALGEBRAIC(:,15).*CONSTANTS(:,28)) - CONSTANTS(:,27).*STATES(:,5);
ALGEBRAIC(:,1) = CONSTANTS(:,1).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,2))).*power(1.00000+power(STATES(:,1)./CONSTANTS(:,3), 4.00000), -1.00000);
ALGEBRAIC(:,18) = power(ALGEBRAIC(:,9)./CONSTANTS(:,41), CONSTANTS(:,42))./(1.00000+power(ALGEBRAIC(:,9)./CONSTANTS(:,41), CONSTANTS(:,42)));
ALGEBRAIC(:,19) = CONSTANTS(:,8).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,10))).*(STATES(:,1)./(STATES(:,1)+CONSTANTS(:,11))).*ALGEBRAIC(:,18) - CONSTANTS(:,9).*(STATES(:,2)./(STATES(:,2)+CONSTANTS(:,12)));
ALGEBRAIC(:,16) = CONSTANTS(:,24).*(STATES(:,6)./(STATES(:,6)+CONSTANTS(:,25))).*(1.00000+ALGEBRAIC(:,15));
ALGEBRAIC(:,8) = - 1.00000+CONSTANTS(:,30)./2.00000+ - ( 0.500000.*power(ALGEBRAIC(:,4), 1.0 ./ 2))+ CONSTANTS(:,30).*(CONSTANTS(:,29)./( STATES(:,6).*power(ALGEBRAIC(:,4), 1.0 ./ 2)));
end
% Compute result of a piecewise function
function x = piecewise(cases, default)
set = [0];
for i = 1:2:length(cases)
if (length(cases{i+1}) == 1)
x(cases{i} & ~set,:) = cases{i+1};
else
x(cases{i} & ~set,:) = cases{i+1}(cases{i} & ~set);
end
set = set | cases{i};
if(set), break, end
end
if (length(default) == 1)
x(~set,:) = default;
else
x(~set,:) = default(~set);
end
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