Graphing an nonlinear ODE

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Nasir Holliday
Nasir Holliday 2020-3-4
评论： Dinesh Yadav 2020-3-9
I have the following code:
%Electroporation Project
sym vars
D=5E-14; %diffusion coefficient for pore radius
kB=1.38E-23; %boltzmann constant
T=310; %temperature
F=0.70E-9; %max electric force
rh = 0.97E-9; %velocity constant
rt = 0.31E-9; %velocity constant
B=1.4E-19; %steric repulsion energy (beta)
rs = 0.51E-9; %minimum radius of hydrophilic pores (r star)
g=1.8E-11; %edge energy (gamma)
s=-1E-4; %sigmaeff
V = 0.3; %solving ODE for these values for both r1 and r2
rj=[-5:5]; %hypothetical range to determine fixed points
drdt=(D/(kB*T))*((V^2*F)*(rj+rt)./(1+rh)+4*B*(rs./rj).^4*(1/rj)-2*pi*g+2*pi*s*rj);
My issue is that I have to plot(rj,drdt), but I cannot seem to figure out how to get the matrix dimensions to agree!! Can someone please tell me where I should put the '.' so the matrix dimensions are equal.
I keep getting the following message and I have tried so many different combinations.
Error using /
Matrix dimensions must agree.

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