How to check dimensions of a dataframe in R?

Recipe Objective

To perform data manipulation of the dataset, we first need to know the size of the data and it's dimensions. ​

In this recipe, we will demonstrate how to check dimensions of a dataframe.

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Step 1: loading required library and a dataset.

# Data manipulation package library(tidyverse) # reading a dataset customer_seg = read.csv('R_192_Mall_Customers.csv')

Step 2: Checking the dimension of the dataframe

We will use dim(dataframe) function to check the dimension ​

dim(customer_seg)

200 5

Note: the output is the Rows X Columns. In this case, Rows = 200 and columns = 5 ​

Alternatively, we can use glimpse(dataframe) function in Tidyverse library to check the dimensions of the dataframe. ​

glimpse(customer_seg)

Observations: 200
Variables: 5
$ CustomerID              1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1...
$ Gender                  Male, Male, Female, Female, Female, Female, ...
$ Age                     19, 21, 20, 23, 31, 22, 35, 23, 64, 30, 67, ...
$ Annual.Income..k..      15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 19, ...
$ Spending.Score..1.100.  39, 81, 6, 77, 40, 76, 6, 94, 3, 72, 14, 99,...

Note: Observations = Rows and Variables = Columns ​