typeof
The Type of an Object
typeof determines the (R internal)
type or storage mode of any object
- Keywords
- attribute
Usage
typeof(x)Arguments
- x
- any R object.
Value
-
A character string. The possible values are listed in the structure
TypeTable in ‘src/main/util.c’. Current values are
the vector types "logical", "integer", "double",
"complex", "character", "raw" and "list",
"NULL",
"closure" (function), "special" and "builtin"
(basic functions and operators), "environment", "S4"
(some S4 objects) and others that are unlikely to be seen at user
level ("symbol", "pairlist", "promise",
"language", "char", "...", "any",
"expression", "externalptr", "bytecode" and
"weakref").
See Also
isS4 to determine if an object has an S4 class.
Examples
library(base)
typeof(2)
mode(2)
Community examples
[Basic data types](https://www.p-wert.eu/rref/einfache-datentypen/) A comparison of type, mode, storage mode and class.. ```r values <- list(TRUE, 5L, 5.3, 3i, "string", raw(2)) values_string <- as.character(values) types <- c() modes <- c() storage_modes <- c() classes <- c() for (variable in values) { types <- append(types, typeof(variable)) modes <- append(modes, mode(variable)) storage_modes <- append(storage_modes, storage.mode(variable)) classes <- append(classes, class(variable)) } result <- data.frame(values_string, types, modes, storage_modes, classes) print(result) ```
```r typeof(c(1,2,3)) typeof(c(1,2,3, "a")) ```