On Thu, 13 Sep 2018, MacQueen, Don wrote:

In my experience, any path that can be used at the shell prompt in a
unix-alike can be used anywhere that R wants a file name.

Don,

  That's been my experiences, too.

Hopefully, that helps...

  That's why I don't understand why the plot() function accepts the
different directory while the sink() function (here) doesn't.

  I showed R rejecting:

sink('stat-summaries/estacada-se-precip.txt')
print(summary(estacada_se_wx))
sink()

while accepting:

pdf('../images/rainfall-estacada-se.pdf')
 <snip xyplot() function>
plot(rain_est_se)
dev.off()

  Changing the sink() file to
'./stat-summaries/estacada-se-precip.txt'

generates the same error while I regularly use this syntax to copy files or
specify the relative path to an executable file.

Regards,

Rich

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