<!doctype html>
<html lang="en">
<head>
<!-- Google Analytics + AdThrive -->
<!-- AdThrive Head Tag Manual -->
<script data-no-optimize="1" data-cfasync="false">
(function (w, d) {
w.adthrive = w.adthrive || {};
w.adthrive.cmd = w.adthrive.cmd || [];
w.adthrive.plugin = "adthrive-ads-manual";
w.adthrive.host = "ads.adthrive.com";
var s = d.createElement("script");
s.async = true;
s.referrerpolicy = "no-referrer-when-downgrade";
s.src =
"https://" +
w.adthrive.host +
"/sites/6434363fc11d8059e61106b4/ads.min.js?referrer=" +
w.encodeURIComponent(w.location.href) +
"&cb=" +
(Math.floor(Math.random() * 100) + 1);
var n = d.getElementsByTagName("script")[0];
n.parentNode.insertBefore(s, n);
})(window, document);
</script>
<!-- End of AdThrive Head Tag -->
<script
async
src="https://www.googletagmanager.com/gtag/js?id=UA-79254642-1"
></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag() {
dataLayer.push(arguments);
}
gtag("js", new Date());
gtag("config", "UA-79254642-1");
</script>
<!-- Google Analytics + OutboundLink + Google Adsense -->
<meta charset="utf-8" />
<title>Density plot with labels on lines – the R Graph Gallery</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="pandoc" />
<meta
name="viewport"
content="width=device-width, initial-scale=1, shrink-to-fit=no"
/>
<meta
name="description"
content="This post explains how to add a
text or labels on the line of a density chart. It uses the ggplot2 and
geomtextpath packages."
/>
<meta
name="keywords"
content="R,ggplot2,tidyverse,Example,Data,Dataviz,Datavisualization,Plot,Chart,Graph,Learning,Caveat,Pitfall,Mistake"
/>
<meta name="author" content="Yan Holtz" />
<link rel="icon" href="img/logo/R_single_small.png" />
<!-- Control appearance when shared by social media -->
<meta
property="og:title"
content="Density plot with labels on
lines"
/>
<meta
property="og:image"
content="https://www.r-graph-gallery.com/img/overview_RGG.png"
/>
<meta
property="og:description"
content="This post explains how to
add a text or labels on the line of a density chart. It uses the ggplot2
and geomtextpath packages."
/>
<meta
property="og:url"
content="https://www.r-graph-gallery.com/361-density-plot-with-labels-on-lines.html.html"
/>
<meta property="og:type" content="website" />
<!-- Bootstrap core CSS -->
<link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet" />
<!-- Custom fonts for this template -->
<link
href="vendor/font-awesome/css/font-awesome.min.css"
rel="stylesheet"
type="text/css"
/>
<!-- Custom styles for this template -->
<link href="css/agency.css" rel="stylesheet" />
<!-- JQUERY -->
<script src="vendor/jquery/jquery.min.js"></script>
</head>
<body data-spy="scroll" data-target="#myScrollspy" data-offset="1">
<!-- THIS ALLOWS TO INSERT THE MENU THAT IS STORED IN A MENU.HTML FILE-->
<nav class="navbar navbar-expand-lg fixed-top" id="mainNav"></nav>
<script>
$(function () {
$("#mainNav").load("html_chunk/menu.html");
});
</script>
<!-- THIS ALLOWS TO INSERT THE MODAL OF THE MENU THAT IS STORED IN A MENU_MODAL.HTML FILE-->
<div id="modal_menu_insertion"></div>
<script>
$(function () {
$("#modal_menu_insertion").load("html_chunk/menu_modal.html");
});
</script>
<div id="modal_subscribe_insertion"></div>
<script>
$(function () {
$("#modal_subscribe_insertion").load("html_chunk/subscribe_modal.html");
});
</script>
<!-- Header = Title in big + social media Icon + quick description -->
<header class="masthead" style="padding-bottom: 30px">
<div class="textlanding">
<center><h1>Density plot with labels on lines</h1></center>
<hr class="short_hr" />
<br />
<ul class="list-inline social-buttons">
<li class="list-inline-item">
<a href="https://twitter.com/R_Graph_Gallery">
<i class="fa fa-twitter"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://github.com/holtzy">
<i class="fa fa-github" style="color: white"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://www.linkedin.com/in/yan-holtz-2477534a/">
<i class="fa fa-linkedin"></i>
</a>
</li>
<li class="list-inline-item social-buttons">
<a href="https://www.yan-holtz.com">
<i class="fa fa-home"></i>
</a>
</li>
</ul>
<center>
<p style="max-width: 600px; margin-top: 40px">
This post explains how to add a text or labels on the line of a
density chart. It uses the
<a href="https://r-graph-gallery.com/ggplot2-package.html"
>ggplot2</a
>
and
<a href="https://www.r-graph-gallery.com/package/geomtextpath.html"
>geomtextpath</a
>
packages for creating the chart and making it nice.
</p>
</center>
<div style="text-align: center">
<a
class="btn btn-secondary btn-xl text-uppercase js-scroll-trigger"
href="density-plot.html"
>Density section</a
>
<a
class="btn btn-secondary btn-xl text-uppercase js-scroll-trigger"
href="https://www.www.data-to-viz.com/graph/density.html"
>Data to Viz</a
>
</div>
</div>
</header>
<!-- THIS ALLOWS TO INSERT THE ADVERTISEMENT BANNER THAT IS STORED IN A BANNER.HTML FILE-->
<div id="position_for_images"></div>
<script>
$(function () {
$("#position_for_images").load("html_chunk/images.html");
});
</script>
<!-- STYLE for chart pages but not the rest of tthe website -->
<style>
img {
margin-top: 20px;
}
</style>
<div class="container">
<div id="package" class="section level1">
<h1>Package</h1>
<hr />
<p>
For this post, we need the
<a href="https://r-graph-gallery.com/ggplot2-package.html">ggplot2</a>
and
<a href="https://www.r-graph-gallery.com/package/geomtextpath.html"
>geomtextpath</a
>
packages.
</p>
<div class="sourceCode" id="cb1">
<pre
class="sourceCode r"
><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1" tabindex="-1"></a><span class="co"># Install the packages if not already done</span></span>
<span id="cb1-2"><a href="#cb1-2" tabindex="-1"></a><span class="co"># install.packages("ggplot2")</span></span>
<span id="cb1-3"><a href="#cb1-3" tabindex="-1"></a><span class="co"># install.packages("geomtextpath")</span></span>
<span id="cb1-4"><a href="#cb1-4" tabindex="-1"></a></span>
<span id="cb1-5"><a href="#cb1-5" tabindex="-1"></a><span class="co"># Load the package</span></span>
<span id="cb1-6"><a href="#cb1-6" tabindex="-1"></a><span class="fu">library</span>(ggplot2)</span>
<span id="cb1-7"><a href="#cb1-7" tabindex="-1"></a><span class="fu">library</span>(geomtextpath)</span></code></pre>
</div>
</div>
<div id="default-density-chart-in-ggplot2" class="section level1">
<h1>Default density chart in ggplot2</h1>
<hr />
<div class="row">
<div class="col-md-12 col-sm-12 align-self-center">
<p>
Here’s what the default density chart output looks like with
<code>ggplot2</code>:
</p>
</div>
<div class="col-md-12 col-sm-12">
<p>
<img
src="361-density-plot-with-labels-on-lines_files/figure-html/thecode2-1.png"
width="100%"
/>
</p>
</div>
</div>
</div>
<div id="add-labels" class="section level1">
<h1>Add labels</h1>
<hr />
<div class="row">
<div class="col-md-12 col-sm-12 align-self-center">
<p>
With the <code>geom_textdensity()</code> function (inspired from
the <code>geom_density()</code> func from
<a href="https://r-graph-gallery.com/ggplot2-package.html"
>ggplot2</a
>), we can add the label of species directly on each density line.
</p>
</div>
<div class="col-md-12 col-sm-12">
<div class="sourceCode" id="cb2">
<pre
class="sourceCode r"
><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1" tabindex="-1"></a><span class="fu">library</span>(hrbrthemes)</span>
<span id="cb2-2"><a href="#cb2-2" tabindex="-1"></a><span class="fu">data</span>(iris)</span>
<span id="cb2-3"><a href="#cb2-3" tabindex="-1"></a></span>
<span id="cb2-4"><a href="#cb2-4" tabindex="-1"></a><span class="fu">ggplot</span>(iris, <span class="fu">aes</span>(<span class="at">x =</span> Sepal.Length, <span class="at">colour =</span> Species, <span class="at">label =</span> Species)) <span class="sc">+</span></span>
<span id="cb2-5"><a href="#cb2-5" tabindex="-1"></a> <span class="fu">geom_textdensity</span>() <span class="sc">+</span></span>
<span id="cb2-6"><a href="#cb2-6" tabindex="-1"></a> <span class="fu">theme_bw</span>() <span class="sc">+</span> <span class="fu">guides</span>(<span class="at">color =</span> <span class="st">'none'</span>)</span></code></pre>
</div>
<p>
<img
src="361-density-plot-with-labels-on-lines_files/figure-html/thecode3-1.png"
width="100%"
/>
</p>
</div>
</div>
</div>
<div id="change-texts-properties" class="section level1">
<h1>Change texts properties</h1>
<hr />
<div class="row">
<div class="col-md-12 col-sm-12 align-self-center">
<p>
The <code>geom_textdensity()</code> can take multiple arguments in
order to change the properties of the labels:
</p>
<ul>
<li>
<p><code>size</code>: size of the text</p>
</li>
<li>
<p><code>fontface</code>: style of the font</p>
</li>
<li>
<p><code>vjust</code>: vertical adjustment</p>
</li>
<li>
<p><code>hjust</code>: horizontal adjustment</p>
</li>
</ul>
<p>
The 2 last arguments can either be float (generally
<strong>between -1 and 1</strong>) or string such as
<code>xmid</code> (or <code>ymid</code>), <code>xmax</code> (or
<code>ymax</code>) and <code>auto</code> (default).
</p>
</div>
<div class="col-md-12 col-sm-12">
<div class="sourceCode" id="cb3">
<pre
class="sourceCode r"
><code class="sourceCode r"><span id="cb3-1"><a href="#cb3-1" tabindex="-1"></a><span class="fu">library</span>(hrbrthemes)</span>
<span id="cb3-2"><a href="#cb3-2" tabindex="-1"></a><span class="fu">data</span>(mtcars)</span>
<span id="cb3-3"><a href="#cb3-3" tabindex="-1"></a></span>
<span id="cb3-4"><a href="#cb3-4" tabindex="-1"></a>mtcars<span class="sc">$</span>labels <span class="ot">=</span> <span class="fu">ifelse</span>(mtcars<span class="sc">$</span>vs<span class="sc">==</span><span class="dv">0</span>, <span class="st">"Type 0"</span>, <span class="st">"Type 1"</span>)</span>
<span id="cb3-5"><a href="#cb3-5" tabindex="-1"></a><span class="fu">ggplot</span>(mtcars, <span class="fu">aes</span>(<span class="at">x =</span> qsec, <span class="at">colour =</span> <span class="fu">as.factor</span>(labels), <span class="at">label =</span> <span class="fu">as.factor</span>(labels))) <span class="sc">+</span></span>
<span id="cb3-6"><a href="#cb3-6" tabindex="-1"></a> <span class="fu">geom_textdensity</span>(<span class="at">size =</span> <span class="dv">6</span>, <span class="at">fontface =</span> <span class="dv">4</span>, <span class="co"># size of 6, bold italic</span></span>
<span id="cb3-7"><a href="#cb3-7" tabindex="-1"></a> <span class="at">vjust =</span> <span class="sc">-</span><span class="fl">0.4</span>, <span class="at">hjust =</span> <span class="st">"ymid"</span>) <span class="sc">+</span></span>
<span id="cb3-8"><a href="#cb3-8" tabindex="-1"></a> <span class="fu">theme_bw</span>() <span class="sc">+</span> <span class="fu">guides</span>(<span class="at">color =</span> <span class="st">'none'</span>)</span></code></pre>
</div>
<p>
<img
src="361-density-plot-with-labels-on-lines_files/figure-html/unnamed-chunk-2-1.png"
width="672"
/>
</p>
</div>
</div>
</div>
<div id="conclusion" class="section level1">
<h1>Conclusion</h1>
<hr />
<p>
In this post, we look at how to use the
<a href="https://www.r-graph-gallery.com/package/geomtextpath.html"
>geomtexpath</a
>
package to <strong>create density plot with text</strong>. To find out
more about how to customize a density plot, see the
<a href="https://r-graph-gallery.com/density-plot.html"
>dedicated section</a
>.
</p>
<!-- Close container -->
</div>
</div>
<!-- ============================ RELATED SECTION ============================ -->
<section
class="bg-light"
id="portfolio_landing"
style="padding-top: 30px; padding-bottom: 30px; margin-top: 100px"
>
<div class="container">
<p class="mySeryTitle">Related chart types</p>
<hr />
<div class="row">
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="scatterplot.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/ScatterPlot150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Scatter</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="heatmap.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/Heatmap150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Heatmap</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="correlogram.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/Correlogram150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Correlogram</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="bubble-chart.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/BubblePlot150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Bubble</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="connected-scatterplot.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/ScatterConnected150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Connected scatter</div>
</div>
<div
class="col-md-2 col-sm-4 portfolio-item show column correlation numonly bigdata"
>
<a class="portfolio-link" href="2d-density-chart.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="https://www.r-graph-gallery.com/img/section/2dDensity150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Density 2d</div>
</div>
</div>
</div>
</section>
<!-- ============================ CONTACT SECTION ============================ -->
<section
id="contact"
class="bg"
style="background-color: white; padding-top: 60px"
>
<div class="container">
<div class="row">
<div class="col-lg-2 text-center"></div>
<div class="col-lg-8 text-center">
<br /><br /><br />
<h2>❤️ 10 best R tricks ❤️</h2>
<p style="max-width: 620px; text-align: center">
👋 After crafting hundreds of R charts over 12 years, I've
distilled my top 10 tips and tricks. Receive them via email!
<b>One insight per day for the next 10 days</b>! 🔥
</p>
<div style="display: flex; justify-content: center">
<script
async
data-uid="329fda5a7e"
src="https://prodigious-trailblazer-3628.ck.page/329fda5a7e/index.js"
></script>
</div>
</div>
</div>
</div>
</section>
<!-- ============================ FOOTER SECTION ============================ -->
<!-- AdThrive Footer Code Start-->
<script
type="text/javascript"
async
src="https://btloader.com/tag?o=5698917485248512&upapi=true&domain=r-graph-gallery.com"
></script>
<script>
!(function () {
"use strict";
var e;
(e = document),
(function () {
var t, n;
function r() {
var t = e.createElement("script");
(t.src =
"https://cafemedia-com.videoplayerhub.com/galleryplayer.js"),
e.head.appendChild(t);
}
function a() {
var t = e.cookie.match("(^|[^;]+)\s*__adblocker\s*=\s*([^;]+)");
return t && t.pop();
}
function c() {
clearInterval(n);
}
return {
init: function () {
var e;
"true" === (t = a())
? r()
: ((e = 0),
(n = setInterval(function () {
(100 !== e && "false" !== t) || c(),
"true" === t && (r(), c()),
(t = a()),
e++;
}, 50)));
},
};
})().init();
})();
</script>
<!-- AdThrive Footer Code End -->
<footer class="bg-light" id="myFooter">
<div class="container">
<div class="row">
<div class="col-md-4">
<span class="copyright"
>Copyright © the R graph gallery 2025</span
>
</div>
<div class="col-md-4">
<ul class="list-inline social-buttons">
<li class="list-inline-item">
<a href="https://twitter.com/R_Graph_Gallery">
<i class="fa fa-twitter"></i>
</a>
</li>
<li class="list-inline-item">
<a href="https://github.com/holtzy">
<i class="fa fa-github"></i>
</a>
</li>
<li class="list-inline-item">
<a href="https://www.linkedin.com/in/yan-holtz-2477534a/">
<i class="fa fa-linkedin"></i>
</a>
</li>
</ul>
</div>
<div class="col-md-4">
<ul class="list-inline quicklinks">
<li class="list-inline-item">
<a href="#">Privacy Policy</a>
</li>
<li class="list-inline-item">
<a href="#">Terms of Use</a>
</li>
</ul>
</div>
</div>
</div>
</footer>
<script>
// add bootstrap table styles to pandoc tables
function bootstrapStylePandocTables() {
$("tr.header")
.parent("thead")
.parent("table")
.addClass("table table-condensed");
}
$(document).ready(function () {
bootstrapStylePandocTables();
});
</script>
<!-- ============================ JAVASCRIPT SECTION ============================ -->
<!-- Bootstrap core JavaScript -->
<script src="vendor/bootstrap/js/bootstrap.bundle.min.js"></script>
<!-- Custom scripts for this template -->
<script src="js/agency.min.js"></script>
</body>
</html>