Why won't a function handle plot?

I have a long and complicated symbolic expression:

syms x

A=(60984*x)/(203125*exp((-(243936*x^4)/203125)^(1/4))*(-(243936*x^4)/203125)^(1/4)) + (((203125^(1/2)*19758816^(1/2)*(1/exp((203125^(3/4)*(-19758816)^(1/4)*i)/203125)))/(17563392*exp((203125^(3/4)*(-19758816)^(1/4))/203125))...etc (continues for another 25,000 char or so)

The expression is a function of x, and appears as a 1x1 symbol. I convert "A" to a function like so:

B=matlabFunction(A)

I would now like to plot B versus x for several values of x. I tried defining x and then using plot(x,B), but the error message says that conversion from double to sym is not possible. Can this be plotted? What am I missing?

Thank you! Kaitlin

Answer 1

[Matt Fig]

When you make a function, you should use it like a function...

syms x
A = 3*x + 5*x^3;
B = matlabFunction(A);
x = 0:.1:10;
plot(x,B(x))

[K]

Thank you!