Jason Becker

Would a good way to handle that be identifying all methods that has a "limit"-style parameters to grab a certain percentage/number of lines and then just do a transform to...

I'll have to peak at what binary formats may or may not have some form of quick access. Unfortunately the benefit of faster loading, smaller file size, and consistent type...

I can't reproduce this issue: ```r library(rio) download.file('https://www.data.gouv.fr/fr/datasets/r/63352e38-d353-4b54-bfd1-f1b3ee1cabd7', destfile = 'covid.csv') df

I have controversial opinions about factors. In my mind, there are two reasons to use factors: 1. Data validation 2. Other functions/packages further down the chain can be smart about...

I'm not seeing great specs on Vega-Lite for `layer`... if we knew what are the required and allowed fields it shouldn't be too bad to implement. Do you have any...

It looks like `layers` are an array of `mark` and `encoding` pairs. If so, maybe the right way to do this would be something like: ``` vegalite() %>% add_data(...) %>%...

Another thought: You could add a `layer` property that defaults to `1` for each property that can be in a layer. Then you can have `add_layer()` append to the layer...

With vegalite 2.0 now in, it's conceptually possible. But we have struggled with what the layer API should look like as you stated.

See also #16

The vegalite object passed around in these functions is a list that is designed to tranlaste to the JSON object. Check out `to_spec` to see.