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Built-in Mathematica Symbol

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Missing

Missing[]
represents data that is missing.

Missing["reason"]
specifies a reason for the data being missing.

Missing["reason", expr]
associates the expression expr with the missing data.

MORE INFORMATION

Missing[...] is a symbolic object, with no default evaluation rules defined.

Typical examples of "reason" include "NotApplicable", "Unknown", "NotAvailable", "Nonexistent", "Indeterminate", "Variable", "Disputed" or "TooLarge".

Missing can be returned by most data functions such as CountryData and ElementData.

Plotting functions automatically omit Missing objects when plotting data.

In TraditionalForm, Missing is typically formatted as —, with a tooltip specifying the reason.

Properties & Relations (1)

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