On Wed, 18 Jun 2008, Tine wrote:
Hi!
Does anyone know hot to set number of digits to be printed in function
'paste'?
paste() does not print, so we can only guess at what you mean. The help
says
'paste' converts its arguments (_via_ 'as.character') to character
strings, and concatenates them (separating them by the string
given by 'sep').
So I guess you are talking about conversion by as.character. And its help
says
'as.character' represents real and complex numbers to 15
significant digits (technically the compiler's setting of the ISO
C constant 'DBL_DIG', which will be 15 on machines supporting
IEC60559 arithmetic according to the C99 standard). This ensures
that all the digits in the result will be reliable (and not the
result of representation error), but does mean that conversion to
character and back to numeric may change the number. If you want
to convert numbers to character with the maximum possible
precision, use 'format'.
and format() seems to be what you too are looking for (or sprintf or
formatC).
Tine Mlač
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