Hello, as you can see in the code below I am trying to make two plots but the problem is that the subplot (2,1,2) goes blank. I got nothing. I think maybe there is something wrong with the variables k1 and v1 since they depend on X(1) and X(3) which come from the solution of an ODE. Can somebody help me? Thanks in advance.

`function [T,X] = call_osc()tspan = [0 2000];x1_0=0.05;x2_0=0.05;x3_0=298.15;x4_0=0.1;odeset('RelTol', 1e-10, 'AbsTol', 1e-12);[T,X]=ode15s(@osc,tspan,[x1_0 x2_0 x3_0 x4_0]);R=8.314;Ea1=80000;alpha=11;A=1;k1= 0.8*exp(-Ea1/(alpha*R*X(3)));v1=k1*A*X(1);subplot(2,1,1)plot(T,X(:,3))grid onxlabel('tiempo(s)','Fontsize',13,'FontWeight','Bold')ylabel('Temperatura (K)','Fontsize',13,'FontWeight','Bold')subplot(2,1,2)plot(X(:,1),v1)grid onend`

## Best Answer