[R] sub('^','var',1:3) produces unexpected results

[David Forrest]

Hi,

According to help(sub), the ^ should match the zero-length string at the
beginning of a string:

sub('^','var',1:3) # "1" "2" "3"
sub('$','var',1:3) # "1var" "2var" "3var"

# This generates what I expected from the first case:
sub('^.','var',11:13)  # "var1" "var2" "var3"

Dave
-- 
 Dr. David Forrest
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