Generate Data sets of same Random Values in R Programming - set.seed() Function

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

Last Updated : 19 Jun, 2020

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 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") ) 

# Printing three rows 
sample_n(d, 3)

Output:

     name age ht school
1  Chaman   9 NA     no
2    Abhi   7 46    yes
3 Bhavesh   5 NA    yes

Example 2:

Python3 1==

# R program to collect sample data
# from 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") ) 

# Printing three rows 
sample_n(d, 3, fac = "name")$name

Output:

[1] Chaman  Bhavesh Dimri  
Levels: Abhi Bhavesh Chaman Dimri

Here, in the above code, column name is specified. Hence, the size is applied within the factor.

Generate Data sets of same Random Values in R Programming - set.seed() Function

N

nidhi_biet

Improve

Article Tags :

Similar Reads

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

Scan and Read Data from a File in R Programming - scan() Function

scan() function in R Language is used to scan and read data. It is usually used to read data into vector or list or from file in R Language. Syntax: scan("data.txt", what = "character") Parameter: data.txt: Text file to be scanned Returns: Scanned output Example 1: Scanning of Text r # R Program to

Generate Data sets of same Random Values in R Programming - set.seed() Function

The set.seed() function in R ensures that random number generation is consistent across different sessions, allowing for identical results each time the code is executed. This is particularly important when sharing code with others or when results need to be verified.Syntax: set.seed(n)Where:n: seed

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

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

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) #

Choose Specific Columns of a Data Frame in R Programming - select() Function

select() function in R Language is used to choose whether a column of the data frame is selected or not. Syntax: select(x, expr) Parameters: x: Data frame expr: condition for selection Example 1: Python3 1== # R program to select specific columns # Loading library library(dplyr) # Create a data fram

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 Quantiles of a Data Set in R Programming - quantile() Function

quantile() function in R Language is used to create sample quantiles within a data set with probability[0, 1]. Such as first quantile is at 0.25[25%], second is at 0.50[50%], and third is at 0.75[75%]. Syntax: quantile(x) Parameters: x: Data set Example 1: Python3 1== # R program to create # quantil

Get the First parts of a Data Set in R Programming - head() Function

head() function in R Language is used to get the first parts of a vector, matrix, table, data frame or function. Syntax: head(x, n) Parameters: x: specified data types n: number of row need to be printed Example 1: Python3 # R program to illustrate # head function # Calling the head() function to #

Reading Tabular Data from files in R Programming

Often, the data which is to be read and worked upon is already stored in a file but is present outside the R environment. Hence, importing data into R is a mandatory task in such circumstances. The formats which are supported by R are CSV, JSON, Excel, Text, XML, etc. The majority of times, the data