Plotting equation with constant

sweetdreams

2015 5 12

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5 次查看（30 天）

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Hi all

I'm trying to plot this graph but for some reason it does not seem to be working.

temp = 250:10:300;
%k = 1.3806488.*exp(-23);
%meu = 9.27400968*exp(-24);
%N = 1:10;
beta = 1/k*temp;
B = 0:0.25:1;
ent = k*N*(log(2*cosh(beta*meu*B))-beta*meu*B*tanh(beta*meu*B));
ent2 = ent/(k*N*(log(2)));
plot(temp,ent2)

I basically want to plot the ent2 equation with different values of B as a function of temperature. The other symbols are all physical constants and have values but I don't know whether I need to put them in as the only value I want to change is B. I've tried just defining the other symbols with syms function but that didn't work either...