Using fsolve for equations

I have a function of two variables,

let us say F=2*x(1)-3*exp(x(2))

I am trying to use fsolve to solve the equation F=0:

x0=[1;1]
options=optimset('Display', 'iter');
[m,fval]=fsolve(@myfun, x0, options);

My question is what if my function is F=y*x(1)-3*exp(x(2)) where y is a constant that i want to pass to F such that

if y=2, F=2*x(1)-3*exp(x(2))
if y=5, F=5*x(1)-3*exp(x(2))

then ... and variables are x(1) and x(2) only?

Answer 1

[Matt J]

 y=whatever;
 F=@(x) y*x(1)-3*exp(x(2));

Not sure how you're going to solve for 2 unknowns with only 1 equation, though.

[Manish]

i am not going to solve two variables with one equation.... i just asked with an equation... i have multiple equations and variables...

How to use it if i have, let us say, 2 equations and two variables and there is one parameter T that i want to pass... e.g. F(1)=T*x(1)-3*exp(x(2)) F(2)=4*T*x(1)-3*exp(x(2)) and T is what i want to pass....

[Matt J]

Same idea. Just make F return a vector instead of a scalar. See also

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