Error using vertcat ; Dimensions of arrays being concatenated are not consistent.

I am trying to use the following code for solving a system of 3 ode. I am getting error which running this code.

beta = 0.1;
delta = 0.05;
max_time = 100;
S0 = 0.95;
I0 = 0.05;
R0 = 0.0;


dXdt = @(t,X) [ -beta*X(1)*X(2); beta*X(1)*X(2) -delta*X(2); delta*X(2)];
[t,X] = ode45(dXdt, [0 max_time],[S0 I0 R0]);
figure
plot(t,X)

Answer 1

[Chunru]

beta = 0.1;
delta = 0.05;
max_time = 100;
S0 = 0.95;
I0 = 0.05;
R0 = 0.0;
dXdt = @(t,X) [ -beta*X(1)*X(2); beta*X(1)*X(2)-delta*X(2); delta*X(2)];
%                                              ^ No space here                     
[t,X] = ode45(dXdt, [0 max_time],[S0 I0 R0]);
figure
plot(t,X)