solving a non linear equation that has constants that must be passed into the equation

I need to solve the following equation:

(1/T)*(3*Tc*J*Brill(x,J)/(J+1) + g*muB*J*B/kB + (9/5)*(((2*J+1)^4)-1)*Tc*nu*((Brill(x,J))^3)/((2*J+2)^4)) - x = 0;

Brill(x,J) = (0.5/J)*((2*J+1)*coth((J+0.5)*x/J)-coth(0.5*x/J));

The issue I am having with solve, and fsolve is that the above equation has constants that need to be passed into the function, since these are material properties and I have multiple materials that I want to be able to run this code on.

Also I want to calculate x for a range of T (temperature) and B (magnetic field) values.

Any help would be greatly appreciated.

Cheers, Oliver

Answer 1

[Matt J]

See this page for passing extra parameters,

http://www.mathworks.com/help/optim/ug/passing-extra-parameters.html

[David Campbell]

That link was somewhat useful, but I already was passing in parameters that way. The issue is when I try to use solve or fsolve i get an error message saying: 'Not enough input arguments'

[Matt J]

Can't see how that would happen if you were following the guidelines in the link. You should consider showing your code and full, copy/pasted error messages so we know precisely what they are and which functions are issuing them.