develop vignettes for {ctar}

[willdebras]

My personal baby {ctar} is a package to query train data from the Chicago Transit Authority's APIs. It is a pretty simple package, but has a lot added in in terms of shape files and datasets of train and bus routes, stop locations, and things like that. A lot of this isn't documented and I would love to flesh out vignettes for these features, showcasing the plotting of shapefiles in {ggplot2}, calculating routes with {ggmap}, and more. This could be a good task for a couple people interested in dataviz.

[emilyriederer]

Excited to know this package exists! Sounds like a great project to explore something pretty near and dear (well, at least near...) to all of us. Just a few questions:

• Is there a master list of ideal vignettes you might want from this (e.g. Set-Up / Basic, Plotting Shapefiles, Calculating Routes, etc.) ?
• If not, how should interested contributors confirm with you that their proposed vignette is of interest? File GH issue on {ctar}? Post here?
• Do you have any preferences for many small vignettes or fewer long vignettes?
• Any vignettes from other pkgs that you'd like contributors to mirror if possible?

[willdebras]

I'm thinking the following:

• A vignette for basics of the train tracker API
• A vignette for basics of the bus tracker API
• A vignette for plotting and using shapefiles
• A possible showcase of using these together, e.g. calculating a route from a location to a location by using ggmap and the station shapefiles to get the nearest train station from your destination and arrival location, calculating route/time to and from those stations, and calculating time on a train between the stations with the cta data to get a full route
• A possible showcase of visualizations of slowdowns, delays, and train density

I'd have to take a look at other packages to know if there are good things to mirror, but have no real preference on length. I'll think about this in the next couple days. Posting here is definitely fine to confirm proposed vignettes. :)