Create Subsets of a Data frame in R Programming - subset() Function

Condense Column Values of a Data Frame in R Programming - summarise() Function

Last Updated : 19 Jun, 2020

summarise() function in R Language is used to condense various values of column of a data frame to one value.

Syntax: summarise(x, expr) Parameters: x: Data Frame expr: Operation to condense data

Example 1:

Python3 1==

# R program to condense data
# of a data frame

# Loading library 
library(dplyr)
  
# Create a data frame
d <- data.frame( name = c("Abhi", "Bhavesh", "Chaman", "Dimri"),  
                 age = c(7, 5, 9, 16),  
                 ht = c(46, NA, NA, 69), 
                 school = c("yes", "yes", "no", "no") ) 

# Calculating min age 
summarise(d, min_age = min(age)) 
  
# Calculating max age 
summarise(d, max_age = max(age))

Output:

  min_age
1       5
  max_age
1      16

Example 2:

Python3 1==

# R program to condense data
# of a data frame

# Loading library 
library(dplyr)
  
# Create a data frame
d <- data.frame( name = c("Abhi", "Bhavesh", "Chaman", "Dimri"),  
                 age = c(7, 5, 9, 16),  
                 ht = c(46, NA, NA, 69), 
                 school = c("yes", "yes", "no", "no") ) 

# Calculating mean of age 
summarise(d, mean = mean(age)) 

# Calculating median of age 
summarise(d, med = median(age))

Output:

  mean
1 9.25
  med
1   8

Create Subsets of a Data frame in R Programming - subset() Function

N

nidhi_biet

Improve

Article Tags :

Similar Reads

Rename Columns of a Data Frame in R Programming - rename() Function

The rename() function in R Programming Language is used to rename the column names of a data frame, based on the older names.Syntax: rename(x, names) Parameters:x: Data frame names: Old name and new name 1. Rename a Data Frame using rename function in RWe are using the plyr package to rename the col

Create Subsets of a Data frame in R Programming - subset() Function

subset() function in R Programming Language is used to create subsets of a Data frame. This can also be used to drop columns from a data frame.Syntax: subset(df, expr)Parameters: df: Data frame usedexpr: Condition for subsetCreate Subsets of Data Frames in R Programming LanguageHere we will make sub

Scale the Columns of a Matrix in R Programming - scale() Function

The scale() function in R is used to center and/or scale the columns of a numeric matrix. It helps standardize data by transforming it to have a mean of 0 and standard deviation of 1 .Syntax scale(x, center = TRUE, scale = TRUE) Parameters: x: represents numeric matrix .center: represents either log

Read contents of a CSV File in R Programming - read.csv() Function

read.csv() function in R Language is used to read "comma separated value" files. It imports data in the form of a data frame. The read.csv() function also accepts a number of optional arguments that we can use to modify the import procedure. we can choose to treat the first row as column names, sele

Generate a set of Sample data from a Data set in R Programming - sample() Function

sample() function in R Language creates random sample based on the parameters provided in the function call. It takes either a vector or a positive integer as the object in the function parameter. Syntax: sample(x, size, replace) Parameters: x: indicates either vector or a positive integer or data f

Take Random Samples from a Data Frame in R Programming - sample_n() Function

sample_n() function in R Language is used to take random sample specimens from a data frame. Syntax: sample_n(x, n) Parameters: x: Data Frame n: size/number of items to select Example 1: Python3 1== # R program to collect sample data # from a data frame # Loading library library(dplyr) # Create a da

Convert an Object to Data Frame in R Programming - as.data.frame() Function

as.data.frame() function in R Programming Language is used to convert an object to data frame. These objects can be Vectors, Lists, Matrices, and Factors. Syntax: as.data.frame(object) Parameters:Â object: Vector, Matrix, factor, or data frameR - as.data.frame() Function ExampleExample 1: Basic exam

Create a Tabular representation of Data in R Programming - table() Function

table() function in R Language is used to create a categorical representation of data with variable name and the frequency in the form of a table. Syntax: table(x) Parameters: x: Object to be converted Example 1: Python3 1== # R Program to create # a tabular representation of data # Creating a vecto

Combine Vectors, Matrix or Data Frames by Columns in R Language - cbind() Function

cbind() function in R Language is used to combine specified Vector, Matrix or Data Frame by columns. Syntax: cbind(x1, x2, ..., deparse.level = 1) Parameters: x1, x2: vector, matrix, data frames deparse.level: This value determines how the column names generated. The default value of deparse.level i

Convert a Vector into Factor in R Programming - as.factor() Function

as.factor() function in R Programming Language is used to convert the passed object(usually Vector) into a Factor. Syntax: as.factor(object) Parameters:Â Object: Vector to be convertedas.factor() Function in R ExampleExample 1: Convert a Factor in RR # Creating a vector x<-c("female", "male", "ma