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id

Identity map

MuPAD® notebooks are not recommended. Use MATLAB® live scripts instead.

MATLAB live scripts support most MuPAD functionality, though there are some differences. For more information, see Convert MuPAD Notebooks to MATLAB Live Scripts.

Syntax

id(x)
id(x1, x2, …)

Description

id(x) evaluates and returns x; id(x1, x2, ...) returns the evaluated arguments as an expression sequence; id() returns the void object null().

Examples

Example 1

id returns the evaluated arguments:

a := 2: id(a + 2)

id(a, b, 4 + 2)

id() returns null():

domtype(id())

delete a:

Example 2

id is useful when working with functional expressions:

f := 3*id + sin + 5*id^2 + exp@(-id^2):
f(x)

f'(x)

delete f:

Parameters

x, x1, x2, …

Arbitrary MuPAD® objects

Return Values

Sequence of the input parameters.

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