velo_apps

velo_apps provides functions of the velo-package as RShiny Apps. This way people unfamiliar with R can now easily use velo-functions.

• spoke_length calculates spoke lengths.
• fixie_teeth calculates for a given gear ratio the optimal combination of cog ring teeth and chainring teeth in terms of skid patches.

To run velo-apps locally, use function runGithub. Taking spoke_app as an example, you can run:

if (packageVersion("devtools") < 1.6) {
    install.packages("devtools")    
    }
if (!"lazyeval" %in% installed.packages()[, "Package"]) {
devtools::install_github("hadley/lazyeval")  
}

# install velo-package
devtools::install_github("jannes-m/velo")
# run App
shiny::runGitHub("velo_apps", "jannes-m", subdir = "spoke_length")

You can also clone the velo_apps-repository to your local computer, then use shiny::runApp("spoke_length") to run the app.

Finally, the apps are also available on the RStudio Shiny Server:

• App to calculate spoke lengths: https://jannes-m.shinyapps.io/spoke_app/
• App to calculate the optimal teeth combination for a fixie bike: https://jannes-m.shinyapps.io/fixie_teeth/

Still to do

1. spoke_length: add source to the (visual) descriptions of the measures to take (e.g., ERD, hub to left flange, etc.) or create your own figures