is.object
Test if an Object has a Class Attribute

### Description

Checks if an object has a "class" attribute.

### Usage

    is.object(x)

### Arguments

x | any object.

### Details

Tests whether an object has an explicit "class" attribute. This is not true for an object with an implicit class, such as a matrix with a "dim" attribute but no "class" attribute.
Value
returns a logical value. If TRUE, the input object has an explicit "class" attribute.
See Also
attr, class
Examples

    is.object(1:4) # FALSE
    is.object(structure(1:4, class="foo")) # TRUE
    is.object(matrix(1:4, ncol=2)) #FALSE

Package base version 6.1.5-18
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