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shelf.html
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<!DOCTYPE html>
<html lang="en"><head>
<script src="shelf_files/libs/clipboard/clipboard.min.js"></script>
<script src="shelf_files/libs/quarto-html/tabby.min.js"></script>
<script src="shelf_files/libs/quarto-html/popper.min.js"></script>
<script src="shelf_files/libs/quarto-html/tippy.umd.min.js"></script>
<link href="shelf_files/libs/quarto-html/tippy.css" rel="stylesheet">
<link href="shelf_files/libs/quarto-html/light-border.css" rel="stylesheet">
<link href="shelf_files/libs/quarto-html/quarto-html.min.css" rel="stylesheet" data-mode="light">
<link href="shelf_files/libs/quarto-html/quarto-syntax-highlighting.css" rel="stylesheet" id="quarto-text-highlighting-styles"><meta charset="utf-8">
<meta name="generator" content="quarto-1.3.450">
<meta name="author" content="Ottavia M. Epifania">
<title>Slow and steady win the race - The shelf</title>
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="shelf_files/libs/revealjs/dist/reset.css">
<link rel="stylesheet" href="shelf_files/libs/revealjs/dist/reveal.css">
<style>
code{white-space: pre-wrap;}
span.smallcaps{font-variant: small-caps;}
div.columns{display: flex; gap: min(4vw, 1.5em);}
div.column{flex: auto; overflow-x: auto;}
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
ul.task-list{list-style: none;}
ul.task-list li input[type="checkbox"] {
width: 0.8em;
margin: 0 0.8em 0.2em -1em; /* quarto-specific, see https://github.com/quarto-dev/quarto-cli/issues/4556 */
vertical-align: middle;
}
/* CSS for syntax highlighting */
pre > code.sourceCode { white-space: pre; position: relative; }
pre > code.sourceCode > span { display: inline-block; line-height: 1.25; }
pre > code.sourceCode > span:empty { height: 1.2em; }
.sourceCode { overflow: visible; }
code.sourceCode > span { color: inherit; text-decoration: inherit; }
div.sourceCode { margin: 1em 0; }
pre.sourceCode { margin: 0; }
@media screen {
div.sourceCode { overflow: auto; }
}
@media print {
pre > code.sourceCode { white-space: pre-wrap; }
pre > code.sourceCode > span { text-indent: -5em; padding-left: 5em; }
}
pre.numberSource code
{ counter-reset: source-line 0; }
pre.numberSource code > span
{ position: relative; left: -4em; counter-increment: source-line; }
pre.numberSource code > span > a:first-child::before
{ content: counter(source-line);
position: relative; left: -1em; text-align: right; vertical-align: baseline;
border: none; display: inline-block;
-webkit-touch-callout: none; -webkit-user-select: none;
-khtml-user-select: none; -moz-user-select: none;
-ms-user-select: none; user-select: none;
padding: 0 4px; width: 4em;
color: #aaaaaa;
}
pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa; padding-left: 4px; }
div.sourceCode
{ color: #003b4f; background-color: #f1f3f5; }
@media screen {
pre > code.sourceCode > span > a:first-child::before { text-decoration: underline; }
}
code span { color: #003b4f; } /* Normal */
code span.al { color: #ad0000; } /* Alert */
code span.an { color: #5e5e5e; } /* Annotation */
code span.at { color: #657422; } /* Attribute */
code span.bn { color: #ad0000; } /* BaseN */
code span.bu { } /* BuiltIn */
code span.cf { color: #003b4f; } /* ControlFlow */
code span.ch { color: #20794d; } /* Char */
code span.cn { color: #8f5902; } /* Constant */
code span.co { color: #5e5e5e; } /* Comment */
code span.cv { color: #5e5e5e; font-style: italic; } /* CommentVar */
code span.do { color: #5e5e5e; font-style: italic; } /* Documentation */
code span.dt { color: #ad0000; } /* DataType */
code span.dv { color: #ad0000; } /* DecVal */
code span.er { color: #ad0000; } /* Error */
code span.ex { } /* Extension */
code span.fl { color: #ad0000; } /* Float */
code span.fu { color: #4758ab; } /* Function */
code span.im { color: #00769e; } /* Import */
code span.in { color: #5e5e5e; } /* Information */
code span.kw { color: #003b4f; } /* Keyword */
code span.op { color: #5e5e5e; } /* Operator */
code span.ot { color: #003b4f; } /* Other */
code span.pp { color: #ad0000; } /* Preprocessor */
code span.sc { color: #5e5e5e; } /* SpecialChar */
code span.ss { color: #20794d; } /* SpecialString */
code span.st { color: #20794d; } /* String */
code span.va { color: #111111; } /* Variable */
code span.vs { color: #20794d; } /* VerbatimString */
code span.wa { color: #5e5e5e; font-style: italic; } /* Warning */
</style>
<link rel="stylesheet" href="shelf_files/libs/revealjs/dist/theme/quarto.css">
<link href="shelf_files/libs/revealjs/plugin/quarto-line-highlight/line-highlight.css" rel="stylesheet">
<link href="shelf_files/libs/revealjs/plugin/reveal-menu/menu.css" rel="stylesheet">
<link href="shelf_files/libs/revealjs/plugin/reveal-menu/quarto-menu.css" rel="stylesheet">
<link href="shelf_files/libs/revealjs/plugin/quarto-support/footer.css" rel="stylesheet">
<style type="text/css">
.callout {
margin-top: 1em;
margin-bottom: 1em;
border-radius: .25rem;
}
.callout.callout-style-simple {
padding: 0em 0.5em;
border-left: solid #acacac .3rem;
border-right: solid 1px silver;
border-top: solid 1px silver;
border-bottom: solid 1px silver;
display: flex;
}
.callout.callout-style-default {
border-left: solid #acacac .3rem;
border-right: solid 1px silver;
border-top: solid 1px silver;
border-bottom: solid 1px silver;
}
.callout .callout-body-container {
flex-grow: 1;
}
.callout.callout-style-simple .callout-body {
font-size: 1rem;
font-weight: 400;
}
.callout.callout-style-default .callout-body {
font-size: 0.9rem;
font-weight: 400;
}
.callout.callout-titled.callout-style-simple .callout-body {
margin-top: 0.2em;
}
.callout:not(.callout-titled) .callout-body {
display: flex;
}
.callout:not(.no-icon).callout-titled.callout-style-simple .callout-content {
padding-left: 1.6em;
}
.callout.callout-titled .callout-header {
padding-top: 0.2em;
margin-bottom: -0.2em;
}
.callout.callout-titled .callout-title p {
margin-top: 0.5em;
margin-bottom: 0.5em;
}
.callout.callout-titled.callout-style-simple .callout-content p {
margin-top: 0;
}
.callout.callout-titled.callout-style-default .callout-content p {
margin-top: 0.7em;
}
.callout.callout-style-simple div.callout-title {
border-bottom: none;
font-size: .9rem;
font-weight: 600;
opacity: 75%;
}
.callout.callout-style-default div.callout-title {
border-bottom: none;
font-weight: 600;
opacity: 85%;
font-size: 0.9rem;
padding-left: 0.5em;
padding-right: 0.5em;
}
.callout.callout-style-default div.callout-content {
padding-left: 0.5em;
padding-right: 0.5em;
}
.callout.callout-style-simple .callout-icon::before {
height: 1rem;
width: 1rem;
display: inline-block;
content: "";
background-repeat: no-repeat;
background-size: 1rem 1rem;
}
.callout.callout-style-default .callout-icon::before {
height: 0.9rem;
width: 0.9rem;
display: inline-block;
content: "";
background-repeat: no-repeat;
background-size: 0.9rem 0.9rem;
}
.callout-title {
display: flex
}
.callout-icon::before {
margin-top: 1rem;
padding-right: .5rem;
}
.callout.no-icon::before {
display: none !important;
}
.callout.callout-titled .callout-body > .callout-content > :last-child {
margin-bottom: 0.5rem;
}
.callout.callout-titled .callout-icon::before {
margin-top: .5rem;
padding-right: .5rem;
}
.callout:not(.callout-titled) .callout-icon::before {
margin-top: 1rem;
padding-right: .5rem;
}
/* Callout Types */
div.callout-note {
border-left-color: #4582ec !important;
}
div.callout-note .callout-icon::before {
background-image: url('data:image/png;base64,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');
}
div.callout-note.callout-style-default .callout-title {
background-color: #dae6fb
}
div.callout-important {
border-left-color: #d9534f !important;
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</head>
<body class="quarto-light">
<div class="reveal">
<div class="slides">
<section id="title-slide" class="quarto-title-block center">
<h1 class="title">Slow and steady win the race - The shelf</h1>
<div class="quarto-title-authors">
<div class="quarto-title-author">
<div class="quarto-title-author-name">
Ottavia M. Epifania
</div>
</div>
</div>
</section>
<section id="what-went-wrong" class="slide level2">
<h2>What went wrong:</h2>
<p><code>appExamples/broken-shelf.R</code></p>
<div class="panel-tabset">
<ul id="tabset-1" class="panel-tabset-tabby"><li><a data-tabby-default="" href="#tabset-1-1">UI</a></li><li><a href="#tabset-1-2">Server</a></li><li><a href="#tabset-1-3">Together</a></li></ul>
<div class="tab-content">
<div id="tabset-1-1">
<div class="cell">
<div class="sourceCode cell-code" id="cb1" data-code-line-numbers="|8|"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1"></a>ui <span class="ot"><-</span> <span class="fu">fluidPage</span>(</span>
<span id="cb1-2"><a href="#cb1-2"></a> <span class="fu">sidebarLayout</span>(<span class="fu">sidebarPanel</span>(</span>
<span id="cb1-3"><a href="#cb1-3"></a> <span class="fu">selectInput</span>(<span class="at">inputId =</span> <span class="st">"dataset"</span>,</span>
<span id="cb1-4"><a href="#cb1-4"></a> <span class="at">label =</span> <span class="st">"Choose a dataset:"</span>,</span>
<span id="cb1-5"><a href="#cb1-5"></a> <span class="at">choices =</span> <span class="fu">list</span>(<span class="st">"rock"</span> <span class="ot">=</span> <span class="dv">1</span>, </span>
<span id="cb1-6"><a href="#cb1-6"></a> <span class="st">"pressure"</span> <span class="ot">=</span> <span class="dv">2</span>,</span>
<span id="cb1-7"><a href="#cb1-7"></a> <span class="st">"cars"</span> <span class="ot">=</span> <span class="dv">3</span>)), </span>
<span id="cb1-8"><a href="#cb1-8"></a> <span class="fu">actionButton</span>(<span class="st">"load"</span>, <span class="st">"Select dataset"</span>)</span>
<span id="cb1-9"><a href="#cb1-9"></a> ),</span>
<span id="cb1-10"><a href="#cb1-10"></a> <span class="fu">mainPanel</span>(</span>
<span id="cb1-11"><a href="#cb1-11"></a> <span class="fu">plotOutput</span>(</span>
<span id="cb1-12"><a href="#cb1-12"></a> <span class="st">"graph"</span> </span>
<span id="cb1-13"><a href="#cb1-13"></a> ), </span>
<span id="cb1-14"><a href="#cb1-14"></a> <span class="fu">verbatimTextOutput</span>( </span>
<span id="cb1-15"><a href="#cb1-15"></a> <span class="st">"summary"</span> </span>
<span id="cb1-16"><a href="#cb1-16"></a> ))))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
<div id="tabset-1-2">
<div class="cell">
<div class="sourceCode cell-code" id="cb2" data-code-line-numbers="|12-14"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1"></a>server <span class="ot"><-</span> <span class="cf">function</span>(input, output){</span>
<span id="cb2-2"><a href="#cb2-2"></a> values <span class="ot"><-</span> <span class="fu">reactiveValues</span>()</span>
<span id="cb2-3"><a href="#cb2-3"></a> dataInput <span class="ot"><-</span> <span class="fu">reactive</span>({</span>
<span id="cb2-4"><a href="#cb2-4"></a> <span class="cf">if</span>(input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">1</span>){</span>
<span id="cb2-5"><a href="#cb2-5"></a> data <span class="ot"><-</span> rock</span>
<span id="cb2-6"><a href="#cb2-6"></a> } <span class="cf">else</span> <span class="cf">if</span> (input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">2</span> ){</span>
<span id="cb2-7"><a href="#cb2-7"></a> data <span class="ot"><-</span> pressure</span>
<span id="cb2-8"><a href="#cb2-8"></a> } <span class="cf">else</span> <span class="cf">if</span> (input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">3</span>) {</span>
<span id="cb2-9"><a href="#cb2-9"></a> data <span class="ot"><-</span> cars</span>
<span id="cb2-10"><a href="#cb2-10"></a> }</span>
<span id="cb2-11"><a href="#cb2-11"></a> })</span>
<span id="cb2-12"><a href="#cb2-12"></a> <span class="fu">observeEvent</span>(input<span class="sc">$</span>load, { </span>
<span id="cb2-13"><a href="#cb2-13"></a> values<span class="sc">$</span>data <span class="ot"><-</span> <span class="fu">data.frame</span>(<span class="fu">dataInput</span>())</span>
<span id="cb2-14"><a href="#cb2-14"></a> })</span>
<span id="cb2-15"><a href="#cb2-15"></a></span>
<span id="cb2-16"><a href="#cb2-16"></a> output<span class="sc">$</span>graph <span class="ot"><-</span> <span class="fu">renderPlot</span>({</span>
<span id="cb2-17"><a href="#cb2-17"></a> <span class="fu">plot</span>(values<span class="sc">$</span>data[, <span class="fu">c</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">2</span>)])</span>
<span id="cb2-18"><a href="#cb2-18"></a> })</span>
<span id="cb2-19"><a href="#cb2-19"></a></span>
<span id="cb2-20"><a href="#cb2-20"></a> output<span class="sc">$</span>summary <span class="ot"><-</span> <span class="fu">renderPrint</span>({</span>
<span id="cb2-21"><a href="#cb2-21"></a> <span class="fu">summary</span>(values<span class="sc">$</span>data)</span>
<span id="cb2-22"><a href="#cb2-22"></a> })</span>
<span id="cb2-23"><a href="#cb2-23"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
<div id="tabset-1-3">
<div class="cell">
<div class="sourceCode cell-code" id="cb3"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb3-1"><a href="#cb3-1"></a><span class="fu">shinyApp</span>(ui, server)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
</div>
</div>
</section>
<section id="justdont-scare-the-users" class="slide level2">
<h2>Just…don’t scare the users</h2>
<div class="layout-sidebar layout-sidebar-left">
<div class="cell panel-sidebar">
<div class="cell-output-display no-overflow-x">
<div class="form-group shiny-input-container">
<label class="control-label" id="dataset-label" for="dataset">Choose a dataset:</label>
<div>
<select id="dataset" class="shiny-input-select"><option value="1" selected="">rock</option>
<option value="2">pressure</option>
<option value="3">cars</option></select>
<script type="application/json" data-for="dataset" data-nonempty="">{"plugins":["selectize-plugin-a11y"]}</script>
</div>
</div>
</div>
<div class="cell-output-display">
<button id="load" type="button" class="btn btn-default action-button">Select dataset</button>
</div>
</div>
<div class="cell panel-fill">
<div class="cell-output-display">
<div class="shiny-plot-output html-fill-item" id="graph" style="width:100%;height:400px;"></div>
</div>
<div class="cell-output-display">
<pre class="shiny-text-output noplaceholder" id="summary"></pre>
</div>
</div>
</div>
</section>
<section id="the-code" class="slide level2">
<h2>The code</h2>
<div class="panel-tabset">
<ul id="tabset-2" class="panel-tabset-tabby"><li><a data-tabby-default="" href="#tabset-2-1">UI</a></li><li><a href="#tabset-2-2">Server</a></li><li><a href="#tabset-2-3">Together</a></li></ul>
<div class="tab-content">
<div id="tabset-2-1">
<div class="cell">
<div class="sourceCode cell-code" id="cb4"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb4-1"><a href="#cb4-1"></a>ui <span class="ot"><-</span> <span class="fu">fluidPage</span>( <span class="co"># same as before</span></span>
<span id="cb4-2"><a href="#cb4-2"></a> <span class="fu">sidebarLayout</span>(</span>
<span id="cb4-3"><a href="#cb4-3"></a> <span class="fu">sidebarPanel</span>(</span>
<span id="cb4-4"><a href="#cb4-4"></a> <span class="fu">selectInput</span>(<span class="at">inputId =</span> <span class="st">"dataset"</span>,</span>
<span id="cb4-5"><a href="#cb4-5"></a> <span class="at">label =</span> <span class="st">"Choose a dataset:"</span>,</span>
<span id="cb4-6"><a href="#cb4-6"></a> <span class="at">choices =</span> <span class="fu">list</span>(<span class="st">"rock"</span> <span class="ot">=</span> <span class="dv">1</span>, </span>
<span id="cb4-7"><a href="#cb4-7"></a> <span class="st">"pressure"</span> <span class="ot">=</span> <span class="dv">2</span>,</span>
<span id="cb4-8"><a href="#cb4-8"></a> <span class="st">"cars"</span> <span class="ot">=</span> <span class="dv">3</span>)),</span>
<span id="cb4-9"><a href="#cb4-9"></a></span>
<span id="cb4-10"><a href="#cb4-10"></a> <span class="fu">actionButton</span>(<span class="st">"load"</span>, <span class="st">"Upload data"</span>)</span>
<span id="cb4-11"><a href="#cb4-11"></a> ),</span>
<span id="cb4-12"><a href="#cb4-12"></a> <span class="fu">mainPanel</span>(</span>
<span id="cb4-13"><a href="#cb4-13"></a> <span class="fu">plotOutput</span>(</span>
<span id="cb4-14"><a href="#cb4-14"></a> <span class="st">"graph"</span></span>
<span id="cb4-15"><a href="#cb4-15"></a> ),</span>
<span id="cb4-16"><a href="#cb4-16"></a> <span class="fu">verbatimTextOutput</span>(</span>
<span id="cb4-17"><a href="#cb4-17"></a> <span class="st">"summary"</span></span>
<span id="cb4-18"><a href="#cb4-18"></a> )</span>
<span id="cb4-19"><a href="#cb4-19"></a> ) </span>
<span id="cb4-20"><a href="#cb4-20"></a> )</span>
<span id="cb4-21"><a href="#cb4-21"></a>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
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<div class="sourceCode cell-code" id="cb5" data-code-line-numbers="|16, 20|"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb5-1"><a href="#cb5-1"></a>server <span class="ot"><-</span> <span class="cf">function</span>(input, output){</span>
<span id="cb5-2"><a href="#cb5-2"></a> values <span class="ot"><-</span> <span class="fu">reactiveValues</span>()</span>
<span id="cb5-3"><a href="#cb5-3"></a> dataInput <span class="ot"><-</span> <span class="fu">reactive</span>({</span>
<span id="cb5-4"><a href="#cb5-4"></a> <span class="cf">if</span>(input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">1</span>){</span>
<span id="cb5-5"><a href="#cb5-5"></a> data <span class="ot"><-</span> rock</span>
<span id="cb5-6"><a href="#cb5-6"></a> } <span class="cf">else</span> <span class="cf">if</span> (input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">2</span> ){</span>
<span id="cb5-7"><a href="#cb5-7"></a> data <span class="ot"><-</span> pressure</span>
<span id="cb5-8"><a href="#cb5-8"></a> } <span class="cf">else</span> <span class="cf">if</span> (input<span class="sc">$</span>dataset <span class="sc">==</span> <span class="dv">3</span>) {</span>
<span id="cb5-9"><a href="#cb5-9"></a> data <span class="ot"><-</span> cars</span>
<span id="cb5-10"><a href="#cb5-10"></a> }</span>
<span id="cb5-11"><a href="#cb5-11"></a> })</span>
<span id="cb5-12"><a href="#cb5-12"></a><span class="fu">observeEvent</span>(input<span class="sc">$</span>load, {</span>
<span id="cb5-13"><a href="#cb5-13"></a> values<span class="sc">$</span>data <span class="ot"><-</span> <span class="fu">data.frame</span>(<span class="fu">dataInput</span>())</span>
<span id="cb5-14"><a href="#cb5-14"></a>})</span>
<span id="cb5-15"><a href="#cb5-15"></a>output<span class="sc">$</span>graph <span class="ot"><-</span> <span class="fu">renderPlot</span>({</span>
<span id="cb5-16"><a href="#cb5-16"></a> <span class="fu">validate</span>(<span class="fu">need</span>(input<span class="sc">$</span>load <span class="sc">></span> <span class="dv">0</span>, <span class="st">"Waiting for data"</span>))</span>
<span id="cb5-17"><a href="#cb5-17"></a> <span class="fu">plot</span>(values<span class="sc">$</span>data[, <span class="fu">c</span>(<span class="dv">1</span><span class="sc">:</span><span class="dv">2</span>)])</span>
<span id="cb5-18"><a href="#cb5-18"></a> })</span>
<span id="cb5-19"><a href="#cb5-19"></a>output<span class="sc">$</span>summary <span class="ot"><-</span> <span class="fu">renderPrint</span>({</span>
<span id="cb5-20"><a href="#cb5-20"></a> <span class="fu">validate</span>(<span class="fu">need</span>(input<span class="sc">$</span>load <span class="sc">></span> <span class="dv">0</span>, <span class="st">"Waiting for data"</span>))</span>
<span id="cb5-21"><a href="#cb5-21"></a> <span class="fu">summary</span>(values<span class="sc">$</span>data)</span>
<span id="cb5-22"><a href="#cb5-22"></a> })</span>
<span id="cb5-23"><a href="#cb5-23"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
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<div class="sourceCode cell-code" id="cb6"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb6-1"><a href="#cb6-1"></a><span class="fu">shinyApp</span>(ui, server)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
</div>
</div>
<p>
<script type="application/shiny-prerendered" data-context="server">
values <- reactiveValues()
dataInput <- reactive({
if(input$dataset == 1){
data <- rock
} else if (input$dataset == 2 ){
data <- pressure
} else if (input$dataset == 3) {
data <- cars
}
})
observeEvent(input$load, {
values$data <- data.frame(dataInput())
})
output$graph <- renderPlot({
validate(need(input$load > 0,
"Waiting for data")
)
plot(values$data[, c(1:2)])
})
output$summary <- renderPrint({
validate(need(input$load > 0, "Waiting for data")
)
summary(values$data)
})
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<script type="application/shiny-prerendered" data-context="server-extras">
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nm <- rep_len("", length(vars))
}
mapply(function(q, nm, val) {
# Infer name, if possible
if (nm == "") {
tryCatch({
nm <- rlang::as_name(q)
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code <- paste(collapse = "\n", deparse(rlang::f_rhs(q)))
stop("ojs_define() could not create a name for the argument: ", code)
})
}
.session$output[[nm]] <- val
outputOptions(.session$output, nm, suspendWhenHidden = FALSE)
.session$sendCustomMessage("ojs-export", list(name = nm))
NULL
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