dear R experts---I am trying to replicate a perl feature. I want to be
able to embed R commands inside a character string, and have the
string be printed with the command executed. my perl equivalent is
my $a=10;
my $teststring = "the expression, $a+1, is ::$a+1::, but add one
more for ::$a+2::\n";
$teststring =~ s/::(.*?)::/$1/gee;
print $teststring;
of course, R does not use '$' for variable names. my ultimate goal is
to write something like
cat("d is a ::class(d):: with names ::names(d)::")
of course, I know I can write this as cat("d is a", class(d), "with
names", names(d)), but I also want to be define %or% so that I can
write
(is.data.frame(d)) %or% "d is a ::class(d):: with names ::names(d)::" ;
operators don't take variable arguments afaik. :-(.
advice appreciated.
regards,
/iaw
----
Ivo Welch (ivo.we...@gmail.com)
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