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tutorial tweaks

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JJ Allaire
2012-07-29 09:27:45 -07:00
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_includes/tutorial/ui-and-server.md
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## UI & Server
Let's walk through the steps of building a simple Shiny application. As with the previous examples we'll be building our user interface using R, however it's also possible to define a user interface directly in HTML (covered more detail in the *HTML UI* topic later in the tutorial).
Let's walk through the steps of building a simple Shiny application. A Shiny application is simply a directory containing a user-interface definition, a server script, and any additional data, scripts, or other resources required to support the application.
A Shiny application is simply a directory containing a user-interface definition, a server script, and any additional data, scripts, or other resources required to support the application.
To get started building the application, create a new empty directory wherever you'd like, then create empty ui.R and server.R files within in. For purposes of illustration we'll assume you've chosen to create the application at ~/shinyapp:
To get started building the application, create a new empty directory wherever you'd like, then create empty `ui.R` and `server.R` files within in. For purposes of illustration we'll assume you've chosen to create the application at ~/shinyapp:
<pre><code>~/shinyapp
|-- ui.R
|-- server.R
</code></pre>
Now we'll add the minimal code required in each source file. For ui.R we'll define our user interface by calling the function `pageWithSidebar` and passing it's result to the `shinyUI` function:
Now we'll add the minimal code required in each source file. We'll first define the user interface by calling the function `pageWithSidebar` and passing it's result to the `shinyUI` function:
#### ui.R
<pre><code class="r">library(shiny)