incorrect number of input arguments

Please help me to resolve what I am doing wrong in my title command.

clear all; close all; clc;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                       Simulation                          %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%value of constants
a1=0.2;a2=0.3;
omega1=5;omega2=4;
G=1;C12=0.01;C21=0.02;
dt=0.01;   %step size
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
x1(1)=0.5;
y1(1)=0.5;
x2(1)=0.5;
y2(1)=0.5;
for i=2:1000
    x1(i)=x1(i-1)+((a1-x1(i-1)^2-y1(i-1)^2)*x1(i-1)-omega1*y1(i-1)+G*C12*(x2(i-1)-x1(i-1)))*dt;
    y1(i)=y1(i-1)+((a1-x1(i-1)^2-y1(i-1)^2)*y1(i-1)+omega1*x1(i-1)+G*C12*(y2(i-1)-y1(i-1)))*dt;
    x2(i)=x2(i-1)+((a2-x2(i-1)^2-y2(i-1)^2)*x2(i-1)-omega2*y2(i-1)+G*C21*(x1(i-1)-x2(i-1)))*dt;
    y2(i)=y2(i-1)+((a2-x2(i-1)^2-y2(i-1)^2)*y2(i-1)+omega2*x2(i-1)+G*C21*(y1(i-1)-y2(i-1)))*dt;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                       Observation                        %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    N_measurements=31;
    N_basis=31;
    index=randi([100,999],1,N_measurements);
    Xdot1=zeros([1,N_measurements]);
    Ydot1=zeros([1,N_measurements]);
    Xdot2=zeros([1,N_measurements]);
    Ydot2=zeros([1,N_measurements]);
    for ni=1:N_measurements
        Xdot1(ni)=(x1(index(ni)+1)-x1(index(ni)))/dt;
        Ydot1(ni)=(y1(index(ni)+1)-y1(index(ni)))/dt;
        Xdot2(ni)=(x2(index(ni)+1)-x2(index(ni)))/dt;
        Ydot2(ni)=(y2(index(ni)+1)-y2(index(ni)))/dt;
    end
    M=zeros([N_measurements,N_basis]);
    for i=1:N_measurements
        for j=1:N_basis 
            if j==1
               M(i,j)=1;
            elseif j==2
               M(i,j)=x1(index(i));
            elseif j==3
               M(i,j)=y1(index(i));
            elseif j==4
               M(i,j)=x2(index(i));
            elseif j==5
               M(i,j)=y2(index(i));
            elseif j==6
               M(i,j)=x1(index(i))^2;
            elseif j==7
                M(i,j)=x2(index(i))^2;
            elseif j==8
                M(i,j)=y1(index(i))^2;
            elseif j==9
                M(i,j)=y2(index(i))^2;
            elseif j==10
                M(i,j)=x1(index(i))*x2(index(i));
            elseif j==11
                M(i,j)=x1(index(i))*y1(index(i));   
            elseif j==12
                M(i,j)=x1(index(i))*y2(index(i));  
            elseif j==13
                M(i,j)=x2(index(i))*y1(index(i));  
            elseif j==14
                M(i,j)=x2(index(i))*y2(index(i)); 
            elseif j==15
                M(i,j)=y1(index(i))*y2(index(i)); 
            elseif j==16
                M(i,j)=x1(index(i))^3;  
            elseif j==17
                M(i,j)=y1(index(i))^3;
            elseif j==18
                M(i,j)=x2(index(i))^3; 
            elseif j==19
                M(i,j)=y2(index(i))^3; 
            elseif j==20
                M(i,j)=x1(index(i))^2*x2(index(i));
            elseif j==21
                M(i,j)=x1(index(i))^2*y1(index(i));
            elseif j==22
                M(i,j)=x1(index(i))^2*y2(index(i));
            elseif j==23
                M(i,j)=x2(index(i))^2*x1(index(i));
            elseif j==24
                M(i,j)=x2(index(i))^2*y1(index(i));
            elseif j==25
                M(i,j)=x2(index(i))^2*y2(index(i));
            elseif j==26
                M(i,j)=y1(index(i))^2*x1(index(i));
            elseif j==27
                M(i,j)=y1(index(i))^2*x2(index(i));
            elseif j==28
                M(i,j)=y1(index(i))^2*y2(index(i));
            elseif j==29
                M(i,j)=y2(index(i))^2*x1(index(i));
            elseif j==30
                M(i,j)=y2(index(i))^2*x2(index(i));
            else   
                M(i,j)=y2(index(i))^2*y1(index(i));             
            end
        end
    end
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %                       RIP                      %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    Norms=zeros([1,N_basis]);
    for j=1:N_basis
        Norms(j)=norm(M(:,j));
    end
    for i=1:N_measurements
        for j=1:N_basis
            M(i,j)=M(i,j)/Norms(j);
        end
    end
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    lambda=0.001;
    Xdot1=Xdot1';
    cd 'E:\MATLAB\bin\cvx\cvx'
    cvx_setup
    cvx_begin 
      variable ksaix1(31); 
      minimize(norm(M*ksaix1-Xdot1)+ lambda*norm(ksaix1,1)); 
    cvx_end
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    Ydot1=Ydot1';
    cvx_setup
    cvx_begin 
      variable ksaiy1(31); 
      minimize(norm(M*ksaiy1-Ydot1)+ lambda*norm(ksaiy1,1)); 
    cvx_end
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    Xdot2=Xdot2';
    cvx_setup
    cvx_begin 
      variable ksaix2(31); 
      minimize(norm(M*ksaix2-Xdot2)+ lambda*norm(ksaix2,1)); 
    cvx_end
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    Ydot2=Ydot2';
    cvx_setup
    cvx_begin 
      variable ksaiy2(31); 
      minimize(norm(M*ksaiy2-Ydot2)+ lambda*norm(ksaiy2,1)); 
    cvx_end
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %                       RIP                      %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    for j=1:N_basis
        ksaix1(j)=ksaix1(j)/Norms(j);
        ksaiy1(j)=ksaiy1(j)/Norms(j);
        ksaix2(j)=ksaix2(j)/Norms(j);
        ksaiy2(j)=ksaiy2(j)/Norms(j);
    end
    ksaix1
    ksaiy1
    ksaix2
    ksaiy2
    figure
    hold on
    plot(x1,'r')
    plot(x2,'g')
    title('a1 = 0.2','Observation 1');
    




%%%Error%%%
Error using title (line 21)
Incorrect number of input arguments

Error in Two_Coupled (line 165)
    title('a1 = 0.2','Observation 1');

Answer 1

[Cris LaPierre]

You have too many inputs to title, just like the error message says.

You are likely trying to create a title and subtitle, but this syntax was introduced in R2020b. You can see it is not mentioned in the R2020a documentation for title. What version of MATLAB are you using?

See the titletext section of the title documentation page on how to create a multiline title.

Answer 2

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/26174-break-title-into-multiple-lines#answer_34191