# Getting Started

Welcome to `sportyR`! I’m Ross Drucker, the author of the `sportyR` package. My aim with this package is to provide high-quality, reliable, baseline plots to use for geospatial analysis of sports data. I’m excited to showcase some of the main functionalities of the package here, as well as continue to develop the package to meet the needs of the sports analytics community.

### Installing R, RStudio, and `sportyR`

(This section courtesy of Saiem Gilani. Give him a follow!)

1. Head to https://cran.r-project.org
2. Select the appropriate link for your operating system (Windows, Mac OS X, or Linux)

- Windows - Select base and download the most recent version
- Mac OS X - Select Latest Release, but check to make sure your OS is the correct version. Look through Binaries for Legacy OS X Systems if you are on an older release
- Linux - Select the appropriate distro and follow the installation instructions

3. Head to RStudio.com
4. Follow the associated download and installation instructions for RStudio.
5. Start peering over the RStudio IDE Cheatsheet. An IDE is an integrated development environment.
6. For Windows users: I recommend you install Rtools. This is not an R package! It is “a collection of resources for building packages for R under Microsoft Windows, or for building R itself”. Go to https://cran.r-project.org/bin/windows/Rtools/ and follow the directions for installation.

`sportyR` is live on CRAN, and the most recent release can be installed by running:

    # Install released version from CRAN
    install.packages("sportyR")

If you’re more into the development version of the package, try this:

    # Install development version from GitHub
    devtools::install_github("sportsdataverse/sportyR")

Once the library is installed, be sure to load it into the working environment.

    # Required to use package
    library(sportyR)

### Understanding and Exploring the Package

The package itself is really an extension of `ggplot2`, but the aim is to focus specifically on a sports playing surface. So that begs the question: what sports can we plot using `sportyR`?

You’re in luck: these kinds of questions are natively answered by what I’ve called the `cani_{question}()` family of functions. They’re designed to answer questions like

> Can I plot a soccer pitch?

or

> Can I plot a PHF ice rink?

and that’s the exact syntax you can follow to have the package answer those questions. Here’s an example:

    # Find out if you can plot a soccer pitch
    cani_plot_sport("soccer")
    #> geom_soccer() can be used to plot for the following leagues: EPL, FIFA, MLS, NCAA, NWSL

or

    # See if a league comes pre-packaged with sportyR
    cani_plot_league("PHF")
    #> A plot for PHF can be created via the geom_hockey() function

I’ll highlight the fact that these are case-insensitive searches. Ask away to your heart’s content!

There’s one other `cani_{question}()` function I’ll highlight more in a bit, but first let’s start acting on the answers to these kinds of questions.

### The `geom_{sport}()` Functions

Now that we can ask questions to the package and get answers, let’s start using this information to make plots. Say for example we’re interested in drawing a regulation NBA basketball court. `sportyR` seeks to make this as easy as possible:

    # Draw a regulation NBA basketball court
    geom_basketball("nba")

Easy as that to get started. Here’s a quick overview of the arguments (which are included for all of the `geom_{sport}()` functions):

- `league`: This is a required parameter, but `custom` is a viable value for any sport. As a quick note, using this `custom` option will require you to specify all parameters of the surface you’re looking to create. This is case-insensitive

- `display_range`: This automatically “zooms” in on the area of the plot you’re interested in. Valid ranges here vary by sport, but can be found by calling `?geom_{sport}` and reading about the display ranges

- `x_trans` and `y_trans`: By default, the origin of the coordinate system always lies at the center of the plot. For example, `(0, 0)` on a basketball court lies along the division line and on the line that connects the center of each basket. If you want to shift the origin (and therefore the entire plot), use `x_trans` and `y_trans` to do so

- `{surface_type}_updates`: A list of updates to the parameters that define the surface. I’ll demo how to use this to change a hockey rink in a different vignette, but I’ll call this out here

- `color_updates`: A list that contains updates to the features’ colors on the plot. These are named by what the feature is, using `snake_case` to specify the names. To get the list of color names you can change, try running `cani_color_league_features()` with your desired league

- `rotation`: An angle (in degrees) that you’d like to rotate the plot by, where +is counterclockwise

- `xlims` and `ylims`: Any limits you’d like to put on the plot in the x and y direction. These will overwrite anything set by the `display_range` parameter

- `{surface}_units`: If your data is in units that are different than how the rule book of the league specifies the units (e.g. you’ve got NHL data in inches, but the rule book describes the rink in feet), change this parameter to match the units you’ve got your data in. You’re welcome to change the units of the data as well, but this is provided for convenience

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## Author

- Ross Drucker