syms - Shortcut for constructing symbolic objects

Syntax

syms arg1 arg2 ... syms arg1 arg2 ... real syms arg1 arg2 ... clear syms arg1 arg2 ... positive

Description

syms arg1 arg2 ... is a shortcut for

arg1 = sym('arg1');
arg2 = sym('arg2'); ...

syms arg1 arg2 ... real is a shortcut for

arg1 = sym('arg1','real');
arg2 = sym('arg2','real'); ...

syms arg1 arg2 ... clear is a shortcut for

arg1 = sym('arg1','clear');
arg2 = sym('arg2','clear'); ...

syms arg1 arg2 ... positive is a shortcut for

arg1 = sym('arg1','positive');
arg2 = sym('arg2','positive'); ...

Each input argument must begin with a letter and can contain only alphanumeric characters. For compatibility with previous versions of the software, syms arg1 arg2 ... unreal has exactly the same effect as syms arg1 arg2 ... clear.

In functions and scripts, do not use the syms command to create symbolic variables with the same names as MATLAB functions. For these names MATLAB does not create symbolic variables, but keeps the names assigned to the functions. If you want to create a symbolic variable with the same name as some MATLAB function inside a function or a script, use the sym command. For example:

alpha = sym('alpha')

Examples

syms x y real is equivalent to

x = sym('x','real');
y = sym('y','real');

To clear the symbolic objects x and y of 'real' status, type

syms x y clear

Note that clear x will not clear the symbolic object of its 'real' status. You can achieve this using

syms x clear to remove the 'real' status from x without affecting any other symbolic variables.
reset(symengine) resets the MuPAD engine.
clear all clears all objects in the MATLAB workspace and resets the MuPAD engine.

syms - Shortcut for constructing symbolic objects

Syntax

Description

Examples

See Also

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