3 messages · Omar Lakkis, Gabor Grothendieck, Brian Ripley
r
[1] open settle <0 rows> (or 0-length row.names)
class(r)
[1] "data.frame" this is an empty data.frame I get back from a sql statement that returns an empty result set. How can I create such an empty data.frame using the data.frame() constructor? I want to have a data.frame with 0 rows but named empty columns. Thanks in advance for any help.
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r
[1] open settle <0 rows> (or 0-length row.names)
class(r)
[1] "data.frame" this is an empty data.frame I get back from a sql statement that returns an empty result set. How can I create such an empty data.frame using the data.frame() constructor? I want to have a data.frame with 0 rows but named empty columns.
Is this what you want?
x <- data.frame(a=character(0), b=numeric(0)) x
[1] a b <0 rows> (or 0-length row.names)
names(x)
[1] "a" "b"
Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595