nrow() and ncol()
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Description

The nrow() and ncol() functions come with R and are part of the Base R {base} package.

We use these functions to find the number of rows (nrow()) or columns (ncol()) of a variable, usually a tibble (data frame).

Conceptual Usage

nrow(tibble)
ncol(tibble)

Examples

The examples below use the carnivores dataset. Learn more about this dataset with get_help("carnivores").

# Show the carnivores dataset
carnivores
## # A tibble: 9 × 4
##   name              genus        awake brainwt
##   <chr>             <fct>        <dbl>   <dbl>
## 1 Arctic fox        Vulpes        11.5  0.0445
## 2 Cheetah           Acinonyx      11.9 NA     
## 3 Dog               Canis         13.9  0.07  
## 4 Gray seal         Haliochoerus  17.8  0.325 
## 5 Jaguar            Panthera      13.6  0.157 
## 6 Lion              Panthera      10.5 NA     
## 7 Northern fur seal Callorhinus   15.3 NA     
## 8 Red fox           Vulpes        14.2  0.0504
## 9 Tiger             Panthera       8.2 NA


# Find the number of rows in carnivores
nrow(carnivores)
## [1] 9


# Find the number of columns in carnivores
ncol(carnivores)
## [1] 4