# Absolute and Relative Frequency in R Programming

In statistics, frequency or absolute frequency indicates the number of occurrences of a data value or the number of times a data value occurs. These frequencies are often plotted on bar graphs or histograms to compare the data values. For example, to find out the number of kids, adults, and senior citizens in a particular area, to create a poll on some criteria, etc.
In R language, frequencies can be depicted as absolute frequency and relative frequency.

#### Absolute Frequency

Absolute frequency shows the number of times the value is repeated in the data vector.

Formula:

where,

is represented as absolute frequency of each value
N represents total number of data values

In R, frequency table of a data vector can be created using table() function.
Syntax:

table(x)


where,
x is data vector

Example:
Assume, “M” represents males and “F” represents females in the data vector below.

 # Defining vector  x <- c("M", "M", "F", "M", "M", "M", "F", "F", "F", "M")     # Absolute frequency table  af <- table(x)     # Printing frequency table  print(af)     # Check the class  class(af)

Output:

x
F M
4 6
[1] "table"


#### Relative Frequency

Relative frequency is the absolute frequency of that event divided by the total number of events. It represents the proportion of a particular data category present in the data vector. Mathematically,

where,

represents the relative frequency of event
is represented as absolute frequency of each value
N represents total number of data values

In R language, table() function and length of data vector is used together to find relative frequency of data vector.
Syntax:

table(x)/length(x)


Example:

 # Defining vector  x <- c("M", "M", "F", "M", "M", "M", "F", "F", "F", "M")     # Relative frequency table  rf <- table(x)/length(x)     # Printing frequency table  print(rf)     # Check the class  class(rf)

Output:

x
F   M
0.4 0.6
[1] "table"


My Personal Notes arrow_drop_up

Blockchain Enthusiast

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

1

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.