val

Value of an object

Use only in the MuPAD Notebook Interface.

This functionality does not run in MATLAB.

Syntax

val(object)

Description

val(object) replaces every identifier in object by its value.

val does not perform any simplification of the result.

If the result of val is a set, duplicate elements are removed from that set.

val does not work recursively, i.e., if the value of an identifier in turn contains identifiers, then these are not replaced by their values. See Example 3.

val does not flatten its argument. Hence, an expression sequence is accepted as argument. Cf. Example 2.

Examples

Example 1

val replaces identifiers by their values, but does not call arithmetical functions such as _plus:

a := 0: val(a*b + 4 + 0)

Duplicate elements in sets are removed:

a := b: val({a, b, a*0})

delete a:

Example 2

val does not flatten its argument, nor does it remove void objects of type DOM_NULL:

a := null(): val((a, null()))
 null(), null() 

However, it is not legal to pass several arguments:

val(a, null())
Error: The number of arguments is incorrect. [val]
delete a:

Example 3

val does not recursively substitute values for the identifiers:

delete a, b: a := b: b := c: val(a)

Parameters

object

Any MuPAD® object

Return Values

"evaluated" object.

See Also

MuPAD Functions

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