Skip to content

Data Science Tutorials

  • Home
  • R
  • Statistics
  • Course
  • Machine Learning
  • Guest Blog
  • Contact
  • About Us
  • Toggle search form
  • How to Avoid Overfitting
    How to Avoid Overfitting? Machine Learning
  • Random Forest Machine Learning
    Random Forest Machine Learning Introduction R
  • How to Use Spread Function in R
    How to Use Spread Function in R?-tidyr Part1 R
  • How to Find Unmatched Records in R
    How to Find Unmatched Records in R R
  • How to Rank by Group in R?
    How to Rank by Group in R? R
  • What Is the Best Way to Filter by Date in R
    What Is the Best Way to Filter by Date in R? R
  • Statistical test assumptions and requirements
    Statistical test assumptions and requirements Statistics
  • How do augmented analytics work
    How do augmented analytics work? R
How to Join Multiple Data Frames in R

How to Join Multiple Data Frames in R

Posted on June 30June 26 By Jim No Comments on How to Join Multiple Data Frames in R
Tweet
Share
Share
Pin

How to Join Multiple Data Frames in R?, you can find it useful to connect many data frames in R. Fortunately, the left join() function from the dplyr package makes this simple to accomplish.

Crosstab calculation in R – Data Science Tutorials

library(dplyr)

Consider the following three data frames, for instance:

Let’s create a data frame

df1 <- data.frame(Q1 = c('a', 'b', 'c', 'd', 'e', 'f'),
                  Q2 = c(152, 514, 114, 218, 322, 323))
df2 <- data.frame(Q1 = c('a', 'a', 'a', 'b', 'b', 'b'),
                  Q3 = c(523, 324, 233, 134, 237, 141))
df3 <- data.frame(Q1 = c('P1', 'e', 'P2', 'g', 'P5', 'i'),
                  Q4 = c(323, 224, 333, 324, 237, 441))

We can easily conduct two left joins, one after the other, to combine all three data frames.

Statistical test assumptions and requirements – Data Science Tutorials

connect the three data frames.

df1 %>%
  left_join(df2
, by='Q1') %>%  left_join(df3, by='Q1')
Q1  Q2  Q3  Q4
1   a 152 523  NA
2   a 152 324  NA
3   a 152 233  NA
4   b 514 134  NA
5   b 514 237  NA
6   b 514 141  NA
7   c 114  NA  NA
8   d 218  NA  NA
9   e 322  NA 224
10  f 323  NA  NA

Notably, the outcome of this join can also be saved as a data frame.

How to Count Distinct Values in R – Data Science Tutorials

After joining the three data frames, create an extra data frame called alldata and save the outcome.

alldata <- df1 %>%
              left_join(df2, by='Q1') %>%
              left_join(df3, by='Q1')

display the resultant data frame’s summary

glimpse(alldata)
Rows: 10
Columns: 4
$ Q1 <chr> "a", "a", "a", "b", "b", "b", "c", "d", "e", "f"
$ Q2 <dbl> 152, 152, 152, 514, 514, 514, 114, 218, 322, 323
$ Q3 <dbl> 523, 324, 233, 134, 237, 141, NA, NA, NA, NA
$ Q4 <dbl> NA, NA, NA, NA, NA, NA, NA, NA, 224, NA

Check your inbox or spam folder to confirm your subscription.

Tweet
Share
Share
Pin
R Tags:dplyr

Post navigation

Previous Post: How to Find Unmatched Records in R
Next Post: How to Replace String in Column using R

Related Posts

  • How to Find Optimal Clusters in R, K-means clustering is one of the most widely used clustering techniques in machine learning.
    How to Find Optimal Clusters in R? R
  • Is Data Science a Dying Profession
    Is Data Science a Dying Profession? R
  • Survival Plot in R
    How to Perform a Log Rank Test in R R
  • Hypothesis Testing in R
    Hypothesis Testing in R R
  • Change ggplot2 Theme Color in R
    Change ggplot2 Theme Color in R ggthemr Package R
  • Arrange the rows in a specific sequence in R
    Arrange the rows in a specific sequence in R R

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

  • About Us
  • Contact
  • Disclaimer
  • Guest Blog
  • Privacy Policy
  • YouTube
  • Twitter
  • Facebook
  • Defensive Programming Strategies in R
  • Plot categorical data in R
  • Top Data Modeling Tools for 2023
  • Ogive Graph in R
  • Is R or Python Better for Data Science in Bangalore

Check your inbox or spam folder to confirm your subscription.

  • Data Scientist Career Path Map in Finance
  • Is Python the ideal language for machine learning
  • Convert character string to name class object
  • How to play sound at end of R Script
  • Pattern Searching in R
  • How to Add a title to ggplot2 Plots in R
    How to Add a caption to ggplot2 Plots in R? R
  • The Multinomial Distribution in R
    The Multinomial Distribution in R R
  • Tips for Rearranging Columns in R
    Tips for Rearranging Columns in R R
  • How to put margins on tables or arrays in R?
    How to put margins on tables or arrays in R? R
  • How to Rank by Group in R?
    How to Rank by Group in R? R
  • How to Join Data Frames for different column names in R
    How to Join Data Frames for different column names in R R
  • Cumulative Sum calculation in R
    Cumulative Sum calculation in R R
  • test for normal distribution in r
    Test for Normal Distribution in R-Quick Guide R

Copyright © 2023 Data Science Tutorials.

Powered by PressBook News WordPress theme