[Rd] Very Long Expressions

Barry Rowlingson B.Rowlingson at lancaster.ac.uk
Mon Jan 24 11:56:37 CET 2005

McGehee, Robert wrote:

>>a <- eval(parse(text = paste(rep(1, 499), collapse = "+")))

  Another little investigation shows that if you type:


at the > prompt (with over 498 '+1's) both R1.8.1 and R2.0.0 produce an 
error message, so it would appear to be something specific to the eval() 
function in R 2.0.x suppressing the error message.

  You can increase the limit by setting options()$expressions - default 
is 500 here. help(options) says you can go up to 100000, but that 
doesn't fix the fundamental problem...

  Time for the gurus to sort this one out...


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