How do I make a function from a symbolic expression in MATLAB?

Question

How can I make a function from a symbolic expression? For example, I have the following:

syms beta
n1,n2,m,aa= Constants
u = sqrt(n2-beta^2);
w = sqrt(beta^2         


        

Answer 1

If you're interested with just the answer for this specific equation, Try Wolfram Alpha, which will give you answers like:

alt text http://www4c.wolframalpha.com/Calculate/MSP/MSP642199013hbefb463a9000051gi6f4heeebfa7f?MSPStoreType=image/gif&s=15

If you want to solve this type of equation programatically, you probably need to use some software packages for symbolic algebra, like SymPy for python.

quoting the official documentation:

>>> from sympy import I, solve
>>> from sympy.abc import x, y

Solve a polynomial equation:

>>> solve(x**4-1, x)
[1, -1, -I, I]

Solve a linear system:

>>> solve((x+5*y-2, -3*x+6*y-15), x, y)
{x: -3, y: 1}