Calling R functions with keyword argumets that have attributes about rcall.jl HOT 9 CLOSED

I don't think the example is reproducible so I will ask you to try

rprint(rcall(:stars,myDF;draw.segments=true))

to see if that works. In Julia named arguments are allowed only after the ; separator.

from rcall.jl.

actually the separator is only required for definitions, you don't need it for calling

from rcall.jl.

I tried it and it did not work. I got the same error

rprint(rcall(:stars,myDf;draw.segments=true))
ERROR: syntax: keyword argument is not a symbol: "draw.segments"

The trouble appears to be with draw.segments. Julia seems to be having trouble passing it along to R. In Julia, I have never come across keyword arguments with attributes as in R.

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@mbeltagy I don't yet have a good way to handle that case.

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It is one of the ways to mimic this, certainly not a good way.

eval(:(rcall(:stars,:mtcars,$(symbol("draw.symbol"))=true)))

It may be also of interest to implement a @rcall macro to handle non-standard keywords and lazy evaluation #42.

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It works!

 eval(:(rcall(:stars,:mtcars,$(symbol("draw.segments"))=true)))

The syntax is a bit cumbersome though. I look forward to an @rcall macro.

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A neat hack I once came across somewhere (I don't remember where). Define the following:

macro var_str(s)
    symbol(s)
end

then the following should work:

rprint(rcall(:stars,myDF;var"draw.segments"=true))

from rcall.jl.

I would be okay with incorporating something along these lines. Any suggestions for a good prefix? r, s, and v are all taken by various uses in Base (which, unfortunately, are the 3 most relevant in this case).

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I've added the above macro, so hopefully that is a reasonable solution.

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