is_index | R Documentation |
Test if an object is a index object or a subclass of an index object.
is_index(x)
is_chainable_index(x)
is_direct_index(x)
x |
An object to test. |
is_index()
returns TRUE
if x
inherits from piar_index
.
is_chainable_index()
returns TRUE
if x
inherits from
chainable_piar_index
.
is_direct_index()
returns TRUE
if x
inherits from
direct_piar_index
.
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