MATLAB: How to display result from solve

MATLAB

How to display the result form solve ?

x = @(y)(y^2-4); eqn =@(y) x(y)==0; syms y; S = vpasolve(eqn(y),y)
Xr2 = [' R2 =  ',num2str(S(2),16)];
disp(Xr2)
Error using num2str (line 53)
Input to num2str must be numeric.

Best Answer

iwant = double(S)

Related Solutions

MATLAB: Get dsolve to accept an inputted string

Do the str2sym() after the syms y(x)

The syms y(x) defines y as a symbolic function of x. When used in an expression after that such as 3*exp(-x)-0.4*y then it is the symbolic function that gets dropped in, so MATLAB knows that it means 3*exp(-x)-0.4*y(x) . But with your current order of operations, with you not having done the syms y(x) yet, then the str2sym('3*exp(-x)-0.4*y') would assume that x and y are plain scalar variables and so the function y(x) would not get coded in to the str2sym() version.

MATLAB: How to use Num2str

Hi, Don't use space between num2str and '('. This will work:

disp (['Iteration ' num2str(it) ': Best cost = ' num2str(Bestcosts(it))]);

Best Answer

Related Solutions

MATLAB: Get dsolve to accept an inputted string

MATLAB: How to use Num2str

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