Namespace Operator

Keystroke: [Ctrl][Shift]N

m_[mc]

This subscript specifies which version of a variable or function name to use in an expression. It resolves ambiguous definitions. Available module names are:

mc, for any built-in Mathcad function or dimensionless constant (for example, e or π),
unit, for any built-in Mathcad unit or dimensioned constant,
user, for any function in a UserDLL, and
doc, referring to the most recent previous definition in the document.

To use it:

Type the first part of the name (m), the part that comes before the subscript.
Type [Ctrl][Shift]N. A set of square braces appear with a placeholder between them.
Type the name of a Mathcad module, for example, unit, to indicate that m represents a built-in Mathcad unit (in this case, meters).

Namespace clarification is useful when you are reusing variable or function names. For example, if you want to distinguish between a variable named m in your document, and the unit meters as defined inside Mathcad, you would type

m:= 3·m_[unit]

meaning that the worksheet variable m has value 3 meters.

Use this operator to clarify function definitions which seem to be recursive but really depend upon previous definitions. For example, defining

sin(x):= sin_[mc](x·deg)

produces a new version of the sine function with arguments in degrees. The use of the [mc] namespace is not essential, but it is clearer. In addition, once you have redefined the built-in function, you can still access the original definition using the [mc] namespace. Use the namespace [doc] when you need to refer to the most recent worksheet definition of a function name outside of the current definition, rather than a built-in Mathcad function name.

Notes:

Be sure not to confuse namespace subscripts with array subscripts or literal subscripts.

Namespace Operator

Notes:

QuickSheet