[R] Supplying names to vars() in ggplot2.

[Hadley Wickham]

See this new vignette in dev ggplot2:
https://ggplot2.tidyverse.org/dev/articles/ggplot2-in-packages.html

Hadley

On Saturday, November 16, 2019, Rolf Turner <r.turner using auckland.ac.nz> wrote:

>
> I need to call ggplot() from another function with the names of the
> faceting variables supplied as arguments to the calling function.  These
> names (which are names of columns in the relevant data frame)
> are given as character arguments, say "rowName" and "colName".
> Suppose that rowName is equal to "clyde" and colName is equal to "irving".
>
> I'd like to do something like
>
> ... + facet_grid(row=vars(rowName), col=vars(colName)) + ...
>
> but this does not work.  For instance, vars(rowName) gives
>
> [[1]]
>> <quosure>
>> expr: ^rowName
>> env:  global
>>
>
> I'd like to get the same thing as if I said vars(clyde) which gives
>
> <list_of<quosure>>
>>
>> [[1]]
>> <quosure>
>> expr: ^clyde
>> env:  global
>>
>
> There *must* be some magic arcane incantation that I can apply to rowName
> (and colName) to get what I want.  Mustn't there?
>
> I tried things like vars(as.name(rowName)) --- nope, no help at all.
>
> Can anyone help me out?
>
> cheers,
>
> Rolf Turner
>
> --
> Honorary Research Fellow
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
>
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-- 
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