[Rd] log2(quote(1:10)) evaluates the quoted 1:10, log() does not
William Dunlap
wdunlap at tibco.com
Wed Mar 10 18:35:39 CET 2010
This is very minor, but shouldn't log2(quote(1:10))
throw an error,the same as log() and other math functions
do? It looks like log2 and log10 evaluate a call object
instead of throwing a non-numeric-argument error. They
do object to non-call language objects, like expressions.
> log2(quote(1:10))
[1] 0.000000 1.000000 1.584963 2.000000 2.321928 2.584963
[7] 2.807355 3.000000 3.169925 3.321928
> log(quote(1:10))
Error in log(quote(1:10)) : Non-numeric argument to mathematical
function
> sqrt(quote(1:10))
Error in sqrt(quote(1:10)) :
Non-numeric argument to mathematical function
> quote(1:10) ^ 2
Error in quote(1:10)^2 : non-numeric argument to binary operator
> 2 ^ quote(1:10)
Error in 2^quote(1:10) : non-numeric argument to binary operator
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
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