{"id":214,"date":"2022-10-04T13:54:07","date_gmt":"2022-10-04T13:54:07","guid":{"rendered":"https:\/\/jassweb.com\/new22\/solved-r-simple-way-to-merge-2-columns-with-not-na-values-duplicate\/"},"modified":"2022-10-04T13:54:07","modified_gmt":"2022-10-04T13:54:07","slug":"solved-r-simple-way-to-merge-2-columns-with-not-na-values-duplicate-2","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-r-simple-way-to-merge-2-columns-with-not-na-values-duplicate-2\/","title":{"rendered":"[Solved] r simple way to merge 2 columns with not NA values [duplicate]"},"content":{"rendered":"<h2> Introduction <\/h2>\n<p>[ad_1]<\/p>\n<p>Merging two columns with non-NA values can be a tricky task, especially when the data is large and complex. Fortunately, there are a few simple methods that can be used to quickly and easily merge two columns with non-NA values. In this article, we will discuss some of the most common methods for merging two columns with non-NA values, including using the CONCATENATE function in Excel, using the MERGE command in SQL, and using the JOIN command in Python. We will also discuss some of the advantages and disadvantages of each method. By the end of this article, you should have a better understanding of how to merge two columns with non-NA values.<\/p>\n<h2> Solution<\/h2>\n<p><\/p>\n<p>Assuming the two columns are named &#8220;column1&#8221; and &#8220;column2&#8221;, you can use the following code to merge the two columns:<\/p>\n<p>df[&#8216;merged_column&#8217;] = df[&#8216;column1&#8217;].combine_first(df[&#8216;column2&#8217;]) <\/p>\n<p><\/p>\n<div class=\"entry-content\" itemprop=\"text\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/p>\n<p><\/p>\n<div id=\"answer-46177023\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"46177023\" data-parentid=\"46176954\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>We can use <code>pmax<\/code><\/p>\n<pre><code>df$a &lt;- do.call(pmax, c(df, na.rm = TRUE))\n<\/code><\/pre>\n<hr>\n<p>Or with <code>coalesce<\/code><\/p>\n<pre><code>library(dplyr)\ndf %&gt;%\n   mutate(a = coalesce(a,b))\n#  a    b\n#1 1 &lt;NA&gt;\n#2 2 &lt;NA&gt;\n#3 3    3\n#4 4    4\n<\/code><\/pre>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p> <span class=\"d-none\" itemprop=\"commentCount\">1<\/span> <\/p>\n<\/div>\n<\/div>\n<p>solved r simple way to merge 2 columns with not NA values [duplicate] <\/p>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-1088640234840270\" crossorigin=\"anonymous\"><\/script><br \/>\n<script><\/p>\n<p><\/script><\/div>\n<p>[ad_2]<\/p>\n<p>Merging two columns with non-NA values can be done in a simple way using the <code>merge()<\/code> function in R. This function allows you to combine two data frames by one or more common columns or row names. The syntax for the <code>merge()<\/code> function is as follows:<\/p>\n<pre><code>merge(x, y, by = \"common_column_name\")\n<\/code><\/pre>\n<p>The <code>x<\/code> and <code>y<\/code> arguments are the two data frames that you want to merge. The <code>by<\/code> argument is the name of the common column or row name that you want to use to merge the two data frames. For example, if you have two data frames, <code>df1<\/code> and <code>df2<\/code>, and you want to merge them by the <code>ID<\/code> column, you can use the following code:<\/p>\n<pre><code>merge(df1, df2, by = \"ID\")\n<\/code><\/pre>\n<p>This will return a new data frame that contains all the rows from both <code>df1<\/code> and <code>df2<\/code>, merged by the <code>ID<\/code> column. The <code>merge()<\/code> function also allows you to specify additional arguments, such as <code>all<\/code>, <code>all.x<\/code>, and <code>all.y<\/code>, which can be used to control how the data frames are merged. For more information on the <code>merge()<\/code> function, please refer to the <a href=\"https:\/\/www.rdocumentation.org\/packages\/base\/versions\/3.6.2\/topics\/merge\">R documentation<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction [ad_1] Merging two columns with non-NA values can be a tricky task, especially when the data is large and complex. Fortunately, there are a few simple methods that can be used to quickly and easily merge two columns with non-NA values. In this article, we will discuss some of the most common methods for &#8230; <a title=\"[Solved] r simple way to merge 2 columns with not NA values [duplicate]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-r-simple-way-to-merge-2-columns-with-not-na-values-duplicate-2\/\" aria-label=\"More on [Solved] r simple way to merge 2 columns with not NA values [duplicate]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[461,321],"class_list":["post-214","post","type-post","status-publish","format-standard","hentry","category-solved","tag-dataframe","tag-r"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] r simple way to merge 2 columns with not NA values [duplicate] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-r-simple-way-to-merge-2-columns-with-not-na-values-duplicate-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] r simple way to merge 2 columns with not NA values [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"Introduction [ad_1] Merging two columns with non-NA values can be a tricky task, especially when the data is large and complex. 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