On 10.06.2010 10:19, Petr PIKAL wrote:
Hi
Peter Ehlers<ehl...@ucalgary.ca> napsal dne 09.06.2010 19:05:24:
Soapbox:
Well, if you're just starting out with R it would be
a VERY good idea to learn right away that T is not TRUE
and F is not FALSE, at least not always. Sooner or
later you WILL have problems. So do yourself a favour
and get into the habit of using TRUE/FALSE instead of T/F.
(I know that Petr knows better.)
Yes good point. However when I work interactively with command prompt I
often (well almost exclusively :-) use T/F instead of TRUE/FALSE as I am
lazy to type. It is necessary to keep habit not to use
T/F/c/matrix/vector/... as names for objects. So T can be used as
abbreviation for TRUE like
mean(x, na.rm=T)
as long as you do not define
T<- "Title"
mean(x, na.rm=T)
Error in if (na.rm) x<- x[!is.na(x)] :
argument is not interpretable as logical
But note that
T <- 0
mean(x, na.rm=T)
will yield a more surprising result and that's the reason why you really
should not even start to use F and T (neither for a logical value nor
for a number).
Uwe Ligges
at least until T/F is removed from such use by R developers
You can even try
?"T"
and you can read help page for that.
Regards
Petr
-Peter Ehlers
On 2010-06-09 9:08, Larissa Lucena wrote:
Thanks so much!!! I'm using R for the first time, and so, I have many
stupid
doubts! Sorry and thanks again!
Regards!
2010/6/9 Petr PIKAL<petr.pi...@precheza.cz>
Hi
where did you find parameter add=T.
You can use
par(new=T)
before using new plot command
or use
points, lines
Regards
Petr
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
