Feature request via Twitter

Suggested references:

• Fenton & Sauve with related Shiny app

Given much of the underlying code would be the same, could WHO standards also be included either as separate functions or as an argument in a broader growth function?

WHO standards are preferred for some ages: https://www.cdc.gov/growthcharts/who_charts.htm
The standard options for the WHO standards are some pretty chunky scripts: http://www.who.int/childgrowth/software/en/

WHO Standards are here: http://www.who.int/childgrowth/standards/en/

When I upload the example data into the Shiny app I get the follow error printed in console and in the shiny app.

`> launch_mchtoolbox()

Listening on http://127.0.0.1:3317
Warning: Error in scale_colour_viridis_d: could not find function "scale_colour_viridis_d"
164: renderPlot [C:\Users\Kyle Hamilton\Documents\R\win-library\3.5\mchtoolbox\shiny/server.R#53]
162: func
122: drawPlot
108: reactive:plotObj
92: drawReactive
79: origRenderFunc
78: output$plot1
2: shiny::runApp
1: launch_mchtoolbox [C:/Users/Kyle Hamilton/Documents/GitHub/mchtoolbox/R/launch_mchtoolbox.R#18]`

@monicagerber et al 👋 according to our recently created package curation policy this repo should now be transferred to either one of your personal accounts, or the ropensci-archive organization.

If you don't answer within one month, I'll transfer the repository to ropensci-archive, after which you could still email me to transfer the repo to a personal account.

Thank you!

Won't build - something to do with data, namespace not working so well.

Right now we only have x-for-age calculations (e.g., weight-for-age or bmi-for-age). The reference data needs to be filtered by the first column, denom == "age".

When checking the package one error comes up
There are ::: calls to the package's namespace in its code. A package
almost never needs to use ::: for its own objects:
'cdcgrowth_prep'