Add a way to provide d3 script as text rather than as a file path, for quick development/testing about r2d3 HOT 4 OPEN

As a workaround, I save the script as a file using writeLines() and then read the resulting file in r2d3()

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@daattali this is already supported, am I missing something? The only change from the code above is using script instead of text:

my_r3_code <- "
// !preview r2d3 data=c(0.3, 0.6, 3, 0.95, 0.40, 0.20), width=600

var barHeight = Math.ceil(height / data.length);

svg.selectAll('rect')
  .data(data)
  .enter().append('rect')
    .attr('width', function(d) { return d * width; })
    .attr('height', barHeight)
    .attr('y', function(d, i) { return i * barHeight; })
    .attr('fill', 'steelblue');
"
r2d3(data = c(0.3, 0.6, 0.8, 0.95, 0.40), script = my_r3_code)

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If that's supposed to work, then yes, that's exactly what I was talking about!

But when I try to run that (Windows 7, R 3.5.2, r2d3 v0.2.3) I get an error

Error in dirname(script) : path too long

I didn't even think of trying that though because the documentation didn't sound like text rather than a script file would work. If this does work, it would be nice if the function documentation made that note.

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Update: I just installed the package from github for the latest dev version and I'm still seeing the same error. @javierluraschi are you sure the code you provided works for you? If so, something strange is going on.

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