matlab syms

In MATLAB, `syms` is a command used to create symbolic variables. These variables are used to solve equations, manipulate expressions, and perform other symbolic computations.

The syntax for creating symbolic variables is:

syms x y z

This creates three symbolic variables `x`, `y`, and `z`. Once these variables are created, they can be used in symbolic expressions and equations. For example:

f = x^2 + y^2;
g = x + y + z;

Here, `f` and `g` are symbolic expressions that use the symbolic variables `x`, `y`, and `z`.

The `syms` command can also be used to define assumptions about the symbolic variables. For example:

syms x y positive

This creates symbolic variables `x` and `y` with the assumption that they are positive. This can be useful when solving equations or manipulating expressions where certain assumptions about the variables are needed.