MATLAB: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

MATLABMATLAB and Simulink Student Suitematlab function

t=linspace(0,1.5,100);

u1=1.75*cos(14.178*t);

u2=exp(-0.89*t)

u3=exp(-0.89*t)*(1.75*cos(14.178*t)

The first 2 expression of this is running my graph. However when I multiply them together as u3, it keeps saying it is invalid expression and might be missing a parenthesis at the end. I tried putting parenthesis at the end and even tried to get rid of the parenthesis, it still gives me error.

Best Answer

You are missing an ending parenthesis, and also you probably need to use element-wise multiply:

u3 = exp(-0.89*t) .* (1.75*cos(14.178*t));

Related Solutions

MATLAB: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

you should add a parenthesis in V_Ba

% Given
syms theta;
R = 20;
L = 80;
H = 38;
theta_1a = 104.720;
% Equation for the velocity of the slider
V_Ba = (theta_1a*R*((cos(theta)-sin(theta)*(H-R*cos(theta))/sqrt(L^2-(H-R*cos(theta))^2)))); %% add one )
% Plot V_B for t between 0 and 2*pi
fplot(V_Ba, [0, 2*pi], 'Linewidth',2)

MATLAB: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

clear
clear global
clc
close all
%format long
global SRex Km Ke V IL6b RaIL6 Tv t_start t_end dataIL6GLP1 t 
% -------------------------------------------------------------------------




% NB: GLYCEMIA      has to be expressed in (mmol/l
%     INSULINEMIA   has to be expressed in (mU/l)
% -------------------------------------------------------------------------
       
        % -------------------------------------------------------------------------
        % OGTT MUSCELLI DATA NORMO
        % E. Muscelli, A. Mari, A. Natali, B.D. Astiarraga, S. Camastra, S. Frascerra, J.J. Holst, E. Ferrannini, Impact of incretin hormones on ?-cell function in subjects with normal or impaired glucose tolerance, Am. J. Physiol. Endocrinol. Metab. 291 (2006) E1144-E1150.
        t_start=1;
        %%
        % 

        %   for x = 1:10
        %       disp(x)
        %   end
        % 
        t=[0 10 20 30 40 60 90 120 150 180];
        dataGLP1out=[-0.0611404034260573;0.153761026536856;0.381887441294696;0.577225771343123;0.785935420734692;1.02732340392451;1.28878665794757;1.46511064263731;1.60857337534354;1.75203610804977;1.79782967573179;1.72437887843715;1.63132839759097;1.49215509632929;1.40577198333615;1.31946203761713;1.21963443800674;1.14002844377781;1.05353557987351;0.927440928858545;0.867507785455261;0.788267627596867]'; 
        dataIL6out=[-0.0611404034260573;0.153761026536856;0.381887441294696;0.577225771343123;0.785935420734692;1.02732340392451;1.28878665794757;1.46511064263731;1.60857337534354;1.75203610804977;1.79782967573179;1.72437887843715;1.63132839759097;1.49215509632929;1.40577198333615;1.31946203761713;1.21963443800674;1.14002844377781;1.05353557987351;0.927440928858545;0.867507785455261;0.788267627596867]'*(1/6); %conversion from pmol/l to mU/l
        % GIP+GLP1
       % incretinaOGTT=[145.716 270.0798 339.5178 329.7588 322.815 318.4284 272.0028 280.0878 284.4702 254.0166]';
       SRex = 0.050;
Km= 0.009;
Ke = 0.059;
V = 14;
IL6b =1.7;
RaIL6 = Ke*IL6b*V;
Tv =67;
%t_start= 1;
t_end = 155;
%RaINCb = 217;
%K1= 1;
%K2=0.1;
       
        %t_end=180;
         % ----------------------------------------------------------------
         
         
        %OGTT NAUCK DATA HEALTHY
        % M.A. Nauck, A. El-Ouaghlidi, B. Gabrys, K. Hücking, J.J Holst, C.F Deacon, B. Gallwitz, W.E. Schmidt, J.J. Meier, Secretion of incretin hormones (GIP and GLP-1) and incretin effect after oral glucose in first-degree relatives of patients with type 2 diabetes, Regul Pept. 122 (2004) 209-217.
        
      %  t=[0 15 30 45 60 75 90 120 150 180 210 240]';
       % glicemiaOGTT=[5.54 8.04 11 11.54 10.64 8.73 7.27 5.73 5.14 4.64 4.63 4.68]';
        %insulinemiaOGTT=[45.45 193.9 478.78 654.5 706.06 472.73 318.18 169.7 109.1 60.61 36.36 26.67]'*(1/6); %conversion from pmol/l to mU/l
        %GIP+GLP1
        %incretinaOGTT=[92.2602 298.347 418.8954 423.4032 431.433 402.3756 370.2276 289.7586 221.4258 178.7952 142.5594 104.3616]';
        %Gb = 5.5;
        %Ib = 7.6;
        %Incb=90; 
        % k7 ESTIMATED FROM IIVG
        %k7=0.158;
        
        %tfinal=240;
        % -------------------------------------------------------------------------
        
% -------------------------------------------------------------------------
 dataIL6GLP1 = [dataGLP1out dataIL6out];
%FIXED PARAMETERS SIMULATOR
%D = 417; %quantity in mmol equivalent to 75g
%kabs=0.22;
%f=0.90;
% HGB_b=0.76875; % hepatic balance
V=14;
%M_ipog=0.03;
%alfa=1.0;
%p=2;
% K1=(p/(p+1))*HGB_b/((G_b)*V);
% K2=(1/(p+1))*HGB_b/(I_b*V);
%K3=0.0718;  % different from zero only when G>10 
%K4=0.717;     % different from zero only when G>10 
%K6=0.1; 
%K9=0.1;
%Ra_INC_b=K6*INC_b*V;
%K5 = 6.91;
% ------------------------------------
% initial values for the parameters to be estimated
%K_0=0.013;
K1_0 = 1;
K2_0 = 0.1;
RaINCb_0=217;
% BETA_0=1;
% K5_0 = 25;
startpar = [K1_0 K2_0 RaINCb_0];
% -------------------------------------



options=optimset('Display','Iter','TolFun',1E-20,'TolX',1E-7,'MaxFunEvals',3000,'MaxIter',500)';
[bestpar, resnorm, residual, exitflag, output, lmd, jacobian]=lsqnonlin(@fz_costo_sana.m,startpar[0.01 0.01 .01] [10 10 10]options)';                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
%bestpar, resnorm, residual, exitflag, output, lmd, jacobian
%K_0=bestpar(1);
K1_0=bestpar(1);
K2_0=bestpar(2);
RaINCb_0=bestpar(3);
% BETA_0=bestpar(4);
% K5_0=bestpar(5);
% beta=-K7*(G_b^1.3)-K8*INC_b+K9*I_b;
% kgri=Kmax;
% E error covariance matrix
[m,n]=size(residual);
E=inv(jacobian'*jacobian);
% -------------------------------------
% standard deviation of the parameters
%std_K=sqrt(E(1,1));
std_K1=sqrt(E(1,1));
std_K2=sqrt(E(2,2));
std_RaINCb=sqrt(E(3,3));
% std_BETA=sqrt(E(4,4));
% std_K5=sqrt(E(5,5));
% -------------------------------------
% percent coefficient of variation of the estimated parameters
%CV_K=(std_K/K)*100
CV_K1=(std_Gama/Gama)*100;
CV_K2=(std_K8/K8)*100;
CV_RaINCb=(std_M/M)*100;
% CV_BETA=(std_BETA/BETA)*100
% CV_K5=(std_K5/K5)*100
% -------------------------------------
figure(1)
sim('MCBS_project_than',t) % replace 'Nuovo_OGTT_Ela' with the name of your Simulink model
plot(t,GLP1_data_VICT,'ro')
xlabel('time (min)')
ylabel('GLP1 (mmol/L)')
hold on
plot(tout,GLP1out,'k')
figure(2)
plot(t,IL6_data_VICT,'ro')
xlabel('time (min)')
ylabel('insulin (mU/L)')
hold on
plot(tout,IL6mout,'k')
% figure(3)
% plot(t,incretinaOGTT,'ro')
% xlabel('time (min)')
% ylabel('incretin (ng/L)')
% hold on
% plot(tout,INCout,'k')
RMSEogtt=sqrt(resnorm/(3*(length(GLP1_data_VICT))));

Error: File: parameterestim_sana.m Line: 109 Column: 98

Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for

mismatched delimiters.

Best Answer

Related Solutions

MATLAB: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

MATLAB: Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters.

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