WebDec 30, 2024 · You can use the following methods to count the number of unique values in a column of a data frame in R: Method 1: Using Base R length (unique (df$my_column)) Method 2: Using dplyr library(dplyr) n_distinct (df$my_column) The following examples show how to use each method in practice with the following data frame: WebApr 16, 2024 · The package "dplyr" comprises many functions that perform mostly used data manipulation operations such as applying filter, selecting specific columns, sorting data, adding or deleting columns and aggregating data. Another most important advantage of this package is that it's very easy to learn and use dplyr functions.
How to Remove a Column using Dplyr package in R
WebSep 21, 2024 · dplyr::count () multiple columns. dat = structure (list (C86_1981 = c ("Outer London", "Buckinghamshire", NA, "Ross and Cromarty", "Cornwall and Isles of Scilly", NA, "Kirkcaldy", "Devon", "Kent", "Renfrew"), C96_1981 = c ("Outer London", … WebSep 2, 2024 · In this article, we will discuss how to rearrange or reorder the column of the dataframe using dplyr package in R Programming Language. Creating Dataframe for demonstration: R library(dplyr) data = data.frame(id = c(7058, 7059, 7060, 7089, 7072, 7078, 7093, 7034), department = c('IT','sales','finance', 'IT','finance','sales', 'HR','HR'), smart charging software for laptop
Column-wise operations • dplyr - Tidyverse
WebOct 24, 2024 · It takes as an argument the column name of the data frame. The variable with the same value is assigned the same rank irrespective of the number of times it appears within the column of the data frame. Example 1: R library(data.table) library(dplyr) data_frame < - data.table(col1=rep(c(5: 7), each=2), col2=c(1, 4, 3, 4, 1, 6), col3=1 ) Web1 hour ago · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. WebOct 24, 2024 · In this example we are going to create a dataframe with a matrix with 3 columns – X1, X2, X3, and all columns are selected and their row sums are computed. An additional column “row_sum” is appended to the end of the dataframe. R library("dplyr") data_frame < - data.frame(matrix(rnorm(30), 10, 3), stringsAsFactors=FALSE) … hillayard sanitary containers