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line.html
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<!DOCTYPE html>
<html lang="en">
<head>
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<script data-no-optimize="1" data-cfasync="false">
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<meta charset="utf-8" />
<title>Line chart | the D3 Graph Gallery</title>
<meta
name="viewport"
content="width=device-width, initial-scale=1, shrink-to-fit=no"
/>
<meta
name="description"
content="The linechart section provides many examples of line charts built with Javascript and D3.js. It provides explanation and reproducible code."
/>
<meta
name="keywords"
content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,lineplot,linechart"
/>
<meta name="author" content="Yan Holtz" />
<link rel="icon" href="img/logo/D3_single_small.png" />
<meta
property="og:title"
content="Line chart | the D3 Graph Gallery"
/>
<meta property="og:image" content="img/overview_RGG.png" />
<meta
property="og:description"
content="The linechart section provides many examples of line charts built with Javascript and D3.js. It provides explanation and reproducible code."
/>
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<!-- Header -->
<header class="masthead" style="padding-top: 150px; padding-bottom: 80px">
<div class="textlanding">
<h1>Line chart</h1>
<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>
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<a href="https://github.com/holtzy">
<i class="fa fa-github" style="color: white"></i>
</a>
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<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>
</ul>
<br /><br />
<p style="max-width: 700px; margin: auto">
This is the
<a href="https://www.data-to-viz.com/graph/line.html">line chart</a>
section of the gallery. If you want to know more about this kind of
chart, visit
<a href="https://www.data-to-viz.com/graph/line.html"
>data-to-viz.com</a
>. If you're looking for a simple way to implement it in d3.js, pick
an example below.
</p>
</div>
</header>
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<!-- ======================== PORTFOLIO SECTION ============================ --><!-- Images must be 480 x 480, resize them with ./script_reformat_img.sh output_name.png -->
<section class="bg" id="portfolio" style="padding-top: 10px">
<div class="container">
<div class="mySeryTitle">Step by step</div>
<hr />
<p>
Line chart are built thanks to the <code>d3.line()</code> helper
function. I strongly advise to have a look to the
<a href="https://www.d3-graph-gallery.com/graph/shape.html#myline"
>basics of this function</a
>
before trying to build your first chart. First example here is the
<a href="graph/line_basic.html">most basic line plot</a> you can do.
Next one shows how to display
<a href="graph/line_several_group.html">several groups</a>, and how to
use <a href="graph/line_smallmultiple.html">small multiple</a> to
avoid the
<a href="https://www.data-to-viz.com/caveat/spaghetti.html"
>spaghetti chart</a
>.
</p>
<div id="portfolio-items" class="row">
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_basic.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Most basic</p>
<hr />
<p class="explanation_portfolio">
The most basic line chart you can do in d3.js. Keeping only
the core code.
</p>
</div>
</div>
<img class="img-fluid" src="img/graph/line_basic.png" alt="" />
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_several_group.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Several groups</p>
<hr />
<p class="explanation_portfolio">
Learn how to represent several groups on the line plot. This
requires to group the data using the d3.nest function.
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_several_group.png"
alt=""
/>
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_smallmultiple.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Small multiple</p>
<hr />
<p class="explanation_portfolio">
Learn how to apply the small multiple technique on line
plot. It allows to avoid the spaghetti plot where lines
become unreadable.
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_smallmultiple.png"
alt=""
/>
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a
class="portfolio-link"
href="graph/line_confidence_interval.html"
>
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Confidence interval</p>
<hr />
<p class="explanation_portfolio">
Display confidence interval around main trend
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_confidence_interval.png"
alt=""
/>
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_color_gradient_svg.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Color gradient</p>
<hr />
<p class="explanation_portfolio">
How to apply a color gradient on the line that is a unique
svg element
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_color_gradient_svg.png"
alt=""
/>
</a>
</div>
</div>
<br /><br />
<div class="mySeryTitle">Interactivity: switch data</div>
<hr />
<p>
Three examples showing how to <u>switch</u> from one data series to
another with smooth transition. <u>Three</u> situations are described.
<u>1/</u> series are stored in
<a href="graph/line_change_data.html">different input file</a>.
<u>2/</u> series are stored in the same dataset, each in a
<a href="graph/line_select.html">different columns</a> (wide format).
<u>3/</u> same dataset, same column: long or tidy format.
</p>
<div id="portfolio-items" class="row">
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_change_data.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>1/ Transition between<br />input data</p>
<hr />
<p class="explanation_portfolio">
Add a button that allows to go from one dataset to another
with a smooth transition. Useful to understand how to build
a <code>update()</code> function.
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_change_data.gif"
alt=""
/>
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_select.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>2/ Transition between<br />column of input</p>
<hr />
<p class="explanation_portfolio">
Dropdown button controls which columns of the dataset is
displayed on the chart.<br /><br />Wide format
</p>
</div>
</div>
<img class="img-fluid" src="img/graph/line_select.gif" alt="" />
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_filter.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>3/ Transition between<br />value of a column</p>
<hr />
<p class="explanation_portfolio">
Dropdown button controls which value of a column is
displayed on the chart.<br /><br />Long format
</p>
</div>
</div>
<img class="img-fluid" src="img/graph/line_filter.gif" alt="" />
</a>
</div>
</div>
<br /><br />
<div class="mySeryTitle">Interactivity: other</div>
<hr />
<p>
Interactivity can also be useful to zoom on a part of the chart or
highlight a specific set of the chart
</p>
<div id="portfolio-items" class="row">
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_brushZoom.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Brush for zooming</p>
<hr />
<p class="explanation_portfolio">
How to use Brush to zoom on a specific part of the line
chart.<br /><br />Double click to reinitialize
</p>
</div>
</div>
<img
class="img-fluid"
src="img/graph/line_brushZoom.gif"
alt=""
/>
</a>
</div>
<div class="col-md-4 col-sm-6 portfolio-item">
<a class="portfolio-link" href="graph/line_cursor.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
<p>Add cursor for exact value</p>
<hr />
<p class="explanation_portfolio">
Recover the closest X position in the dataset and display
its exact value
</p>
</div>
</div>
<img class="img-fluid" src="img/graph/line_cursor.gif" alt="" />
</a>
</div>
</div>
</div>
</section>
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<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="line.html">
<div class="portfolio-hover">
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<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Line150.png" alt="" />
</a>
<div class="captionPortfolio">Line plot</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="area.html">
<div class="portfolio-hover">
<div class="portfolio-hover-content">
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</div>
</div>
<img class="img-fluid" src="img/section/Area150.png" alt="" />
</a>
<div class="captionPortfolio">Area</div>
</div>
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<div class="portfolio-hover">
<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img
class="img-fluid"
src="img/section/StackedArea150.png"
alt=""
/>
</a>
<div class="captionPortfolio">Stacked area</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="streamgraph.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="img/section/Stream150.png" alt="" />
</a>
<div class="captionPortfolio">Streamchart</div>
</div>
</div>
</div>
</section>
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