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<!DOCTYPE html>
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<meta charset="utf-8">
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<body>
<div id="quarto-content" class="page-columns page-rows-contents page-layout-article">
<div id="quarto-margin-sidebar" class="sidebar margin-sidebar">
<nav id="TOC" role="doc-toc" class="toc-active">
<h2 id="toc-title">Table of contents</h2>
<ul>
<li><a href="#quarto-shinylive" id="toc-quarto-shinylive" class="nav-link active" data-scroll-target="#quarto-shinylive">Quarto + Shinylive</a></li>
<li><a href="#swiss-info-data" id="toc-swiss-info-data" class="nav-link" data-scroll-target="#swiss-info-data">Swiss Info data</a></li>
<li><a href="#visualize" id="toc-visualize" class="nav-link" data-scroll-target="#visualize">Visualize</a></li>
<li><a href="#now-with-shiny" id="toc-now-with-shiny" class="nav-link" data-scroll-target="#now-with-shiny">Now with Shiny!</a></li>
<li><a href="#butnot-so-fast" id="toc-butnot-so-fast" class="nav-link" data-scroll-target="#butnot-so-fast">But…Not So Fast…</a>
<ul class="collapse">
<li><a href="#working-with-data" id="toc-working-with-data" class="nav-link" data-scroll-target="#working-with-data">Working with data</a></li>
<li><a href="#other-limitations" id="toc-other-limitations" class="nav-link" data-scroll-target="#other-limitations">Other limitations:</a></li>
</ul></li>
<li><a href="#conclusion" id="toc-conclusion" class="nav-link" data-scroll-target="#conclusion">Conclusion</a></li>
</ul>
</nav>
</div>
<main class="content" id="quarto-document-content">
<header id="title-block-header" class="quarto-title-block default">
<div class="quarto-title">
<h1 class="title">Quarto Shinylive test</h1>
</div>
<div class="quarto-title-meta">
</div>
</header>
<section id="quarto-shinylive" class="level2">
<h2 class="anchored" data-anchor-id="quarto-shinylive">Quarto + Shinylive</h2>
<p>Taking Quarto docs to the next level by embedding live, fully interactive Shiny apps!</p>
<p>Experiment inspired by Joe Cheng’s presentation ‘<a href="https://www.youtube.com/watch?v=j1M6YyU2ZX8">Running R-Shiny without a Server</a>’ at posit::conf(2023). (20 min video)</p>
<p>Additional reference:</p>
<ul>
<li>To learn more about Shinylive see <a href="https://github.com/posit-dev/r-shinylive" class="uri">github.com/posit-dev/r-shinylive</a>.</li>
<li>Try online version of Shinylive for R and see examples at <a href="https://shinylive.io/r/examples/">shinylive.io/r/examples/</a></li>
<li>To learn more about Quarto see <a href="https://quarto.org" class="uri">quarto.org</a>.</li>
</ul>
<p><em><strong>Note:</strong> this project set up using ‘.renv’ which is good for reproducibility, but may cause complications for package management on different machines over time.</em></p>
</section>
<section id="swiss-info-data" class="level2">
<h2 class="anchored" data-anchor-id="swiss-info-data">Swiss Info data</h2>
<p>R built-in example data on social indicators by region.</p>
<div class="cell">
<details class="code-fold">
<summary>Code</summary>
<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>swiss <span class="ot"><-</span> swiss</span>
<span id="cb1-2"><a href="#cb1-2" aria-hidden="true" tabindex="-1"></a>swiss<span class="sc">$</span>prov <span class="ot"><-</span> <span class="fu">rownames</span>(swiss)</span>
<span id="cb1-3"><a href="#cb1-3" aria-hidden="true" tabindex="-1"></a>swiss_top <span class="ot"><-</span> swiss <span class="sc">%>%</span> <span class="fu">arrange</span>(<span class="sc">-</span>Fertility) <span class="sc">%>%</span> <span class="fu">slice_head</span>(<span class="at">n=</span><span class="dv">10</span>)</span>
<span id="cb1-4"><a href="#cb1-4" aria-hidden="true" tabindex="-1"></a><span class="co"># save with relative location for importing to shiny app below -> doesn't help</span></span>
<span id="cb1-5"><a href="#cb1-5" aria-hidden="true" tabindex="-1"></a><span class="fu">write_csv</span>(swiss_top, <span class="st">'data/swiss_top.csv'</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</details>
</div>
</section>
<section id="visualize" class="level2">
<h2 class="anchored" data-anchor-id="visualize">Visualize</h2>
<p>Typical static plot produced with ggplot2: useful, but limited:</p>
<div class="cell" data-layout-align="left">
<details class="code-fold">
<summary>Code</summary>
<div class="sourceCode cell-code" id="cb2"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>swiss_top <span class="sc">%>%</span> <span class="fu">ggplot</span>(<span class="fu">aes</span>(<span class="at">x=</span><span class="fu">reorder</span>(prov,Fertility), <span class="at">y=</span>Fertility))<span class="sc">+</span><span class="fu">geom_col</span>()<span class="sc">+</span></span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a> <span class="fu">geom_hline</span>(<span class="at">yintercept=</span><span class="fu">mean</span>(swiss_top<span class="sc">$</span>Fertility), <span class="at">linetype=</span><span class="st">'dashed'</span>, <span class="at">color=</span><span class="st">'green'</span>)<span class="sc">+</span></span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a> <span class="fu">coord_flip</span>()<span class="sc">+</span></span>
<span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a> <span class="fu">scale_y_continuous</span>(<span class="at">expand=</span><span class="fu">expansion</span>(<span class="at">mult=</span><span class="fu">c</span>(<span class="dv">0</span>,<span class="fl">0.02</span>)))<span class="sc">+</span></span>
<span id="cb2-5"><a href="#cb2-5" aria-hidden="true" tabindex="-1"></a> <span class="fu">labs</span>(<span class="at">title=</span><span class="st">'Top 10 Swiss Provinces by Fertility'</span>, <span class="at">x=</span><span class="st">""</span>, </span>
<span id="cb2-6"><a href="#cb2-6" aria-hidden="true" tabindex="-1"></a> <span class="at">subtitle =</span> <span class="st">'(births per 1,000 women; dotted line = average)'</span>)<span class="sc">+</span></span>
<span id="cb2-7"><a href="#cb2-7" aria-hidden="true" tabindex="-1"></a> <span class="fu">theme_light</span>()<span class="sc">+</span></span>
<span id="cb2-8"><a href="#cb2-8" aria-hidden="true" tabindex="-1"></a> <span class="fu">theme</span>(<span class="at">axis.ticks.y =</span> <span class="fu">element_blank</span>(),</span>
<span id="cb2-9"><a href="#cb2-9" aria-hidden="true" tabindex="-1"></a> <span class="at">axis.text.y =</span> <span class="fu">element_text</span>(<span class="at">size=</span><span class="dv">12</span>))</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</details>
<div class="cell-output-display">
<div id="fig-swiss" class="quarto-figure quarto-figure-left quarto-float anchored" data-fig-align="left">
<figure class="quarto-float quarto-float-fig figure">
<div aria-describedby="fig-swiss-caption-0ceaefa1-69ba-4598-a22c-09a6ac19f8ca">
<img src="quarto-shinylive-test-01_files/figure-html/fig-swiss-1.png" class="img-fluid quarto-figure quarto-figure-left figure-img" width="768">
</div>
<figcaption class="quarto-float-caption-bottom quarto-float-caption quarto-float-fig" id="fig-swiss-caption-0ceaefa1-69ba-4598-a22c-09a6ac19f8ca">
Figure 1: from Swiss Fertility & Socioeconomic Indicators (1888); built-in R dataset.
</figcaption>
</figure>
</div>
</div>
</div>
</section>
<section id="now-with-shiny" class="level2">
<h2 class="anchored" data-anchor-id="now-with-shiny">Now with Shiny!</h2>
<p>Fully interactive chart that leverages R shiny plus webR technology to display in browser…<strong><em>without</em></strong> the need for <strong>shiny server</strong>!</p>
<pre class="shinylive-r" data-engine="r"><code>#| standalone: true
#| viewerHeight: 700
# load packages
library(shiny)
library(datasets)
library(tidyverse)
library(scales)
library(here)
# get data - import saved file with relative location
#swiss_top <- read_csv('data/swiss_top.csv') # failed attempt at reading data
swiss <- datasets::swiss
swiss$prov <- rownames(swiss)
swiss <- swiss %>% arrange(-Fertility)
# Define shiny ui
ui <- fluidPage(
# shiny UI components here
# Application title
titlePanel("Swiss Fertility Data by Province"),
# Sidebar layout with input and output definitions
sidebarLayout(
# Sidebar panel for inputs
sidebarPanel(
numericInput(inputId='num_prov', label='No. of Provs to show',
value=10, min=1, max=50, step=1),
# Input: checkbox for the regions to plot - dynamic based on num_prov
checkboxGroupInput(inputId='prov', label='Select province',
choices=swiss$prov,
selected=swiss$prov)
), # end sidebarPanel
# Main panel for displaying outputs
mainPanel(
h3('Swiss Fertility'),
# Output: Column chart rendered with ggplot2
plotOutput(outputId = "fert", height="540px")
) # end mainPanel
)
)
# Define shiny server logic here
server <- function(input, output, session) {
# shiny server code
# Reactive expression to generate the plot based on the inputs
output$fert <- renderPlot({
swiss_top <- swiss %>% filter(prov %in% input$prov)
#swiss_top <- swiss
# Generate ggplot2 column chart
swiss_top |> ggplot(aes(x=reorder(prov, Fertility), y=Fertility))+geom_col()+
geom_hline(yintercept=mean(swiss_top$Fertility),
linetype='dashed', color='green')+
coord_flip()+
scale_y_continuous(expand=expansion(mult=c(0,0.05)))+
labs(title='Swiss Provinces by Fertility (1888)',
subtitle = '(births per 1,000 women; dotted line = average)',
x="")+
theme_light()+
theme(axis.ticks.y = element_blank(),
axis.text.y = element_text(size=12))
})
}
# create and launch shiny app
shinyApp(ui = ui, server = server)</code></pre>
<p>Code display doesn’t work with the {shinylive-r} code block, so showing the skeleton with shown below. Key unique components:</p>
<ul>
<li>{shinyline-r}</li>
<li>#| standalone: true</li>
<li>#| viewerHeight: 600 - ensures app window is large enough</li>
<li>the rest is standard shiny code</li>
</ul>
<div class="cell">
<details class="code-fold">
<summary>Code</summary>
<div class="sourceCode cell-code" id="cb4"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>{shinylive<span class="sc">-</span>r}</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="co">#| standalone: true</span></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="co">#| viewerHeight: 600</span></span>
<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a><span class="fu">library</span>(shiny)</span>
<span id="cb4-6"><a href="#cb4-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-7"><a href="#cb4-7" aria-hidden="true" tabindex="-1"></a>ui <span class="ot"><-</span> <span class="fu">fluidPage</span>(</span>
<span id="cb4-8"><a href="#cb4-8" aria-hidden="true" tabindex="-1"></a> <span class="fu">titlePanel</span>(<span class="st">"Swiss Fertility Data by Province"</span>),</span>
<span id="cb4-9"><a href="#cb4-9" aria-hidden="true" tabindex="-1"></a> <span class="fu">sidebarLayout</span>(</span>
<span id="cb4-10"><a href="#cb4-10" aria-hidden="true" tabindex="-1"></a> <span class="fu">sidebarPanel</span>(</span>
<span id="cb4-11"><a href="#cb4-11" aria-hidden="true" tabindex="-1"></a> <span class="fu">checkboxGroupInput</span>()</span>
<span id="cb4-12"><a href="#cb4-12" aria-hidden="true" tabindex="-1"></a> ),</span>
<span id="cb4-13"><a href="#cb4-13" aria-hidden="true" tabindex="-1"></a> <span class="fu">mainPanel</span>(</span>
<span id="cb4-14"><a href="#cb4-14" aria-hidden="true" tabindex="-1"></a> <span class="fu">plotOutput</span>(<span class="at">outputId =</span> <span class="st">"fert"</span>)</span>
<span id="cb4-15"><a href="#cb4-15" aria-hidden="true" tabindex="-1"></a> )</span>
<span id="cb4-16"><a href="#cb4-16" aria-hidden="true" tabindex="-1"></a> )</span>
<span id="cb4-17"><a href="#cb4-17" aria-hidden="true" tabindex="-1"></a>)</span>
<span id="cb4-18"><a href="#cb4-18" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-19"><a href="#cb4-19" aria-hidden="true" tabindex="-1"></a><span class="co"># Define shiny server logic here </span></span>
<span id="cb4-20"><a href="#cb4-20" aria-hidden="true" tabindex="-1"></a>server <span class="ot"><-</span> <span class="cf">function</span>(input, output, session) {</span>
<span id="cb4-21"><a href="#cb4-21" aria-hidden="true" tabindex="-1"></a> output<span class="sc">$</span>fert <span class="ot"><-</span> <span class="fu">renderPlot</span>({</span>
<span id="cb4-22"><a href="#cb4-22" aria-hidden="true" tabindex="-1"></a> })</span>
<span id="cb4-23"><a href="#cb4-23" aria-hidden="true" tabindex="-1"></a>}</span>
<span id="cb4-24"><a href="#cb4-24" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-25"><a href="#cb4-25" aria-hidden="true" tabindex="-1"></a><span class="co"># create and launch shiny app</span></span>
<span id="cb4-26"><a href="#cb4-26" aria-hidden="true" tabindex="-1"></a><span class="fu">shinyApp</span>(<span class="at">ui =</span> ui, <span class="at">server =</span> server)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</details>
</div>
</section>
<section id="butnot-so-fast" class="level2">
<h2 class="anchored" data-anchor-id="butnot-so-fast">But…Not So Fast…</h2>
<p>There are some significant limitations.</p>
<section id="working-with-data" class="level3">
<h3 class="anchored" data-anchor-id="working-with-data">Working with data</h3>
<p>By far the most significant, as I’m as I’m concerned:</p>
<ul>
<li><strong>not able to load external data from outside the shiny app</strong> (as far as I can tell)
<ul>
<li>no import csv (even local to the quarto project)</li>
<li>no database connection</li>
<li>no read googlesheet</li>
</ul></li>
<li>I can only use data generated within the app OR built-in R datasets.</li>
</ul>
<p>I haven’t been able to figure a way to import data to the app, despite attempting many approaches. So this is a <strong>deal-breaker</strong> for a lot applications - pretty much all of the use cases I would have.</p>
</section>
<section id="other-limitations" class="level3">
<h3 class="anchored" data-anchor-id="other-limitations">Other limitations:</h3>
<ul>
<li>single file app, so limited complexity</li>
<li>hard to debug - no error messages or other clues when app fails
<ul>
<li>can use <a href="https://shinylive.io/r/examples/">shinylive.io</a> for testing</li>
</ul></li>
<li>not all R packages available - but most, so shouldn’t be major blocker</li>
<li>slow loading time - a nuisance, but generally not unbearable</li>
<li>restricted size: limited by format of quarto document</li>
</ul>
<p>Note that these limitations apply specifically to using Shinylive for embedding into Quarto documents. This is only one use case. Others include:</p>
<ul>
<li><a href="https://shinylive.io/r/examples/">shinylive.io</a>: for prototyping, potentially sharing apps.</li>
<li><a href="https://www.youtube.com/watch?v=B3Nggr9X4rY&t=803s">shiny app conversion</a>: from regular shiny app that needs a server to serverless app that can be shared more easily.</li>
</ul>
</section>
</section>
<section id="conclusion" class="level2">
<h2 class="anchored" data-anchor-id="conclusion">Conclusion</h2>
<p>This is <strong>powerful technology</strong> that currently has limited application - but will likely become even more valuable over time. Maybe <strong>not ready for primetime</strong>, but will have to <strong>keep an eye on this</strong>!</p>
</section>
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