Question

I’m new to MATLAB and I’m having problems plotting these two equations. I’m trying to solve for a and c:

j = sym('2*(X*1/a)-((X)^2*1/a)+1/a')
k = sym('2*(1-X*1/a)-((1-X)^2*1/a)+c')

sol = solve(j,'a',k,'c');

Then I get “Conversion to double from struct is not possible.”:

plot(sol,'a')

I also tried:

plot(sol,'a','c') (Not enough input arguments)
plot(sol,sol.a,sol.c) (Conversion to double from struct is not possible.)

Answer 1

When I try your code, I get the following answer:

Warning: Explicit solution could not be found.

Symbolic solutions can be found only for simple equations. I guess your problem is too hard to be solved analytically by matlab.