formula

Return body of symbolic function or matrix function

Syntax

formula(f)

Description

formula(f) returns the body, or definition, of the symbolic function or matrix function f.

Examples

Return Body of Symbolic Function

Return the body, or definition, of a symbolic function by using formula.

syms x y
f(x,y) = x + y;
formula(f)

ans = $$x+y$$

If the symbolic function does not have a definition, formula returns the symbolic function.

syms g(x,y)
formula(g)

ans = $$g\left(x,y\right)$$

Return Body of Symbolic Matrix Function

Return the body, or definition, of a symbolic matrix function by using formula.

syms A 2 matrix
syms f(A) 2 matrix keepargs
f(A) = A*A - 3*A + 2*eye(2);
formula(f)

ans = $$2\hspace{0.17em}{\mathrm{I}}_2-3\hspace{0.17em}A+A^2$$

If the symbolic matrix function does not have a definition, formula returns the symbolic matrix function.

syms g(A) [1 2] matrix keepargs
formula(g)

ans = $$g\left(A\right)$$

Input Arguments

f — Input function

symbolic function | symbolic matrix function

Input function, specified as a symbolic function or symbolic matrix function.

Data Types: symfun | symfunmatrix

Version History

Introduced in R2012a

R2022a: Return body of symbolic matrix functions

The formula function accepts an input argument of type symfunmatrix. For an example, see Return Body of Symbolic Matrix Function.