Obtain Extended Properties of Objects

Combination of most common “macro-level” functions that describe an object.

what.is(x, ...)

Arguments

x

Any object.

...

Included for backward-compatibility only. Has no real use.

Value

A list with following elements:

properties

A data frame with the class(es), type, mode and storage mode of the object as well as the dim, length and object.size.

attributes.lengths

A named character vector giving all attributes (c.f. “names”, “row.names”, “class”, “dim”, and so forth) along with their length.

extensive.is

A character vector of all the identifier functions. (starting with “is.”) that yield TRUE when used with x as argument.

function.type

When x is a function, results of ftype are added.

Details

An alternative to calling in turn class, typeof, dim, and so on. A call to this function will readily give all this information at once.

See also

class, typeof, mode, storage.mode, dim, length, is.object, otype, object.size, ftype

Author

Dominic Comtois, dominic.comtois@gmail.com

Examples

what.is(1)
#> Checking object against known 'is...' functions (54)
#> $properties
#>       property    value
#> 1        class  numeric
#> 2       typeof   double
#> 3         mode  numeric
#> 4 storage.mode   double
#> 5          dim         
#> 6       length        1
#> 7    is.object    FALSE
#> 8  object.type     base
#> 9  object.size 56 Bytes
#> 
#> $extensive.is
#> [1] "is.atomic"         "is.double"         "is.finite"        
#> [4] "is.finite.POSIXlt" "is.numeric"        "is.vector"        
#> 
what.is(NaN)
#> Checking object against known 'is...' functions (54)
#> $properties
#>       property    value
#> 1        class  numeric
#> 2       typeof   double
#> 3         mode  numeric
#> 4 storage.mode   double
#> 5          dim         
#> 6       length        1
#> 7    is.object    FALSE
#> 8  object.type     base
#> 9  object.size 56 Bytes
#> 
#> $extensive.is
#> [1] "is.atomic"      "is.double"      "is.na"          "is.nan"        
#> [5] "is.nan.POSIXlt" "is.numeric"     "is.vector"     
#> 
what.is(iris3)
#> Checking object against known 'is...' functions (54)
#> $properties
#>       property      value
#> 1        class      array
#> 2       typeof     double
#> 3         mode    numeric
#> 4 storage.mode     double
#> 5          dim 50 x 4 x 3
#> 6       length        600
#> 7    is.object      FALSE
#> 8  object.type       base
#> 9  object.size 5816 Bytes
#> 
#> $attributes.lengths
#>      dim dimnames 
#>        3        3 
#> 
#> $extensive.is
#> [1] "is.array"    "is.atomic"   "is.double"   "is.numeric"  "is.unsorted"
#> 
what.is(print)
#> Checking object against known 'is...' functions (54)
#> $properties
#>       property      value
#> 1        class   function
#> 2       typeof    closure
#> 3         mode   function
#> 4 storage.mode   function
#> 5          dim           
#> 6       length          1
#> 7    is.object      FALSE
#> 8  object.type       base
#> 9  object.size 1240 Bytes
#> 
#> $extensive.is
#> [1] "is.function"  "is.recursive"
#> 
#> $function.type
#> [1] "s3"      "generic"
#> 
what.is(what.is)
#> Checking object against known 'is...' functions (54)
#> $properties
#>       property        value
#> 1        class     function
#> 2       typeof      closure
#> 3         mode     function
#> 4 storage.mode     function
#> 5          dim             
#> 6       length            1
#> 7    is.object        FALSE
#> 8  object.type         base
#> 9  object.size 167792 Bytes
#> 
#> $extensive.is
#> [1] "is.function"  "is.recursive"
#> 
#> $function.type
#> [1] "function"
#>