{"id":234189,"date":"2021-12-15T09:28:05","date_gmt":"2021-12-15T15:28:05","guid":{"rendered":"https:\/\/finnstats.com\/?p=14369"},"modified":"2021-12-15T09:28:05","modified_gmt":"2021-12-15T15:28:05","slug":"how-to-find-unique-values-in-r","status":"publish","type":"post","link":"https:\/\/www.r-bloggers.com\/2021\/12\/how-to-find-unique-values-in-r\/","title":{"rendered":"How to Find Unique Values in R"},"content":{"rendered":"\r\n\r\n
\r\n[This article was first published on Methods \u2013 finnstats<\/a><\/strong>, and kindly contributed to R-bloggers<\/a>]. (You can report issue about the content on this page here<\/a>)\r\n
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Visit for the most up-to-date information on Data Science, employment, and tutorials finnstats<\/a>.<\/p>\n

If you want to read the original article, go here How to Find Unique Values in R<\/a><\/p>\n\n

To find unique values in a column in a data frame, use the unique() function in R.<\/p>\n\n\n\n

In Exploratory Data Analysis, the unique() function is crucial since it detects and eliminates duplicate values in the data. <\/p>\n\n\n\n

Let\u2019s look at how to get the unique data out of the R object.<\/p>\n\n\n\n

Syntax<\/h2>\n\n\n\n
unique(data)<\/pre>\n\n\n\n
data: It is a vector \/ data frame \/array \/ NULL.<\/p>\n\n\n\n
The following data frame is used in this tutorial to demonstrate how to utilize this function.<\/p>\n\n\n\n
Principal Component Analysis in R \u00bb finnstats<\/a><\/p>\n\n\n\n
Let\u2019s create a data frame for illustration purposes,<\/p>\n\n\n\n
data <- data.frame(Product=c('A', 'A', 'B', 'B', 'C', 'C'),\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Likeability=c(80, 98, 80, 82, 70, 65),\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Score=c(31, 30, 33, 33, 33, 23),\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Quality=c(16, 24, 32, 56, 18, 12))<\/pre>\n\n\n\n
Let\u2019s view the data frame<\/p>\n\n\n\n
data\r\n    Product Likeability Score Quality\n1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 A\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 80\u00a0\u00a0\u00a0 31\u00a0\u00a0\u00a0\u00a0\u00a0 16\n2\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0A\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 98\u00a0\u00a0\u00a0 30\u00a0\u00a0\u00a0\u00a0\u00a0 24\n3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 80\u00a0\u00a0\u00a0 33\u00a0\u00a0\u00a0\u00a0\u00a0 32\n4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 B\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 82\u00a0\u00a0\u00a0 33\u00a0\u00a0\u00a0\u00a0\u00a0 56\n5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 70\u00a0\u00a0\u00a0 33\u00a0\u00a0\u00a0\u00a0\u00a0 18\n6\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 65\u00a0\u00a0\u00a0 23\u00a0\u00a0\u00a0\u00a0\u00a0 12<\/pre>\n\n\n\n
Example 1: Find Unique Values in R<\/h3>\n\n\n\n
Use the unique() function to retrieve unique elements from a Vector, data frame, or array-like R object. <\/p>\n\n\n\n
The unique() function in R returns a vector, data frame, or array-like object with duplicate elements and rows deleted.<\/p>\n\n\n\n
Data Visualization Graphs-ggside with ggplot \u00bb finnstats<\/a><\/p>\n\n\n\n
The code below demonstrates how to locate unique values in the \u2018Product\u2019 column.<\/p>\n\n\n\n
unique(data$Product)\r\n[1] "A" "B" "C"<\/pre>\n\n\n\n
In the \u2018Score\u2019 column, we may use similar syntax to find unique values:<\/p>\n\n\n\n
unique(data$Score)\r\n[1] 31 30 33 23<\/pre>\n\n\n\n
Example 2: Find & Sort Unique Values in R<\/h3>\n\n\n\n
The code below demonstrates how to locate and sort unique values in the \u2018Score\u2019 column.<\/p>\n\n\n\n
datatable editor-DT package in R \u00bb Shiny, R Markdown & R \u00bb finnstats<\/a><\/p>\n\n\n\n
sort(unique(data$Score))\r\n[1] 23 30 31 33<\/pre>\n\n\n\n
In addition, we can sort unique values in descending order<\/p>\n\n\n\n
sort(unique(data$Score), decreasing=TRUE)\r\n[1] 33 31 30 23<\/pre>\n\n\n\n
Example 3: Find & Count Unique Values in R<\/h3>\n\n\n\n
The code below demonstrates how to locate and count the number of each distinct value in the \u2018Score\u2019 column.<\/p>\n\n\n\n
Regression Analysis Example-Ultimate Guide \u00bb finnstats<\/a><\/p>\n\n\n\n
table(data$Score)\r\n23 30 31 33\n 1  1\u00a0 1\u00a0 3<\/pre>\n\n\n\n
The numbers 23, 30, and 31 appear once, whereas the number 33 appears three times, according to the above output.<\/p>\n\n\n\n
Conclusion<\/h2>\n\n\n\n
In a vector, data frame, or array, the unique() function removes duplicate elements\/rows.<\/p>\n\n\n\n
What is neural network in machine learning? \u00bb finnstats<\/a><\/p>\n
Don't forget to express your happiness by leaving a comment.
\nHow to Find Unique Values in R<\/a>.<\/p>\n
The post How to Find Unique Values in R<\/a> appeared first on finnstats<\/a>.<\/p>\n\n
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Visit for the most up-to-date information on Data Science, employment, and tutorials finnstats.
\nIf you want to read the original article, go here How to Find Unique Values in R
\nTo find unique values in a column in a data frame, use the unique() function in R. In Exploratory Data …<\/p>\n","protected":false},"author":2637,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"aioseo_notices":[],"jetpack-related-posts":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/posts\/234189"}],"collection":[{"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/users\/2637"}],"replies":[{"embeddable":true,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/comments?post=234189"}],"version-history":[{"count":5,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/posts\/234189\/revisions"}],"predecessor-version":[{"id":235345,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/posts\/234189\/revisions\/235345"}],"wp:attachment":[{"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/media?parent=234189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/categories?post=234189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.r-bloggers.com\/wp-json\/wp\/v2\/tags?post=234189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}