Why the following code does not give me the 3D plot. Please someone help me out.

clc;clear;close all;
syms Lambda beta1
delta=-2.9994;
beta2=0.732932;
rho1=-0.187641;
rho2=0.187641;
gama1=-0.254351;
gama2=-0.553853;
delta1=-0.0127175;
delta2=-0.179079;
R0=Lambda*((beta1.*gama2.*rho1+beta2.*gama1.*rho2)+(beta1.*delta2.*rho1+beta2.*delta1.*rho2))./delta.*((rho1+rho2).*(gama1+delta1).*(gama2+delta2));
ezmesh(R0,[0,1],100)
colormap parula

Answer 1

[Chunru]

In your definition of R0, there is a term rho1+rho2, which happen to be 0. So R0 is just 0. Check your formula first.