Vignettes needed

[elinw]

We could use some good vignettes of both simple and advanced use.

[elinw]

A couple of vignettes are now in the develop branch, but they could definitely be expanded.

[elinw]

For example we could use vignettes on how to use the individual functions or how to do printing (though that is a bit complex, it would be great for someone to start it off at least.) Don't feel you need to write everything.

[elinw]

We need to update the vignettes with new features.

[elinw]

We have good basic vignettes but it would be nice to add more extended examples of use cases. This might go into a third vignette if someone would like to create it.

[elinw]

Add a vignette about working with skimr +dplyr.

[elinw]

We're pretty good on the basics but could still use others addressing specific tasks that people do with skimr (such as make variable summary tables for papers).

[kylebutts]

For the supporting additional objects vignette:

1. There is no need to have an sfc_MulitX for each class. All the classes inherit sfc class and skimr is able to work fine with:
   skim_sf <- skim_with(
   sfc = sfl(
   n_unique = n_unique,
   valid = ~ sum(sf::st_is_valid(.))
   )
   )

2. I think a function that is simple without being silly is:

get_crs <- function(column){
crs <- sf::st_crs(column)

paste0("epsg: ", crs[["epsg"]], " proj4string: '", crs[["proj4string"]], "'")
}

I have an updated .Rmd, if you think think that will be helpful for the vignette.

[michaelquinn32]

Thanks for the suggestion!

Please check the contribution guide and open a pull request. We can discuss particulars in the updated version of the Rmd.