4 messages · hill0093, Gabor Grothendieck, Ben Bolker
It looks to me like the index range starts at 1 in R. Is this true? If so, is there a way to change it to start at 0? That way, I wouldn't have to make so many changes when I translate a function from another language.
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You can define origin 0 objects yourself if you like.
Here is a partial implementation:
"[.orig0" <- function(x, i)
if (is.numeric(i)) .subset(x, i+0) else .subset(x, i)
orig0 <- function(x)
structure(x, class = c("orig0", setdiff(class(x), "orig0")))
x <- orig0(1:5)
x[0:3] # 1:4
Note that usually 0 means leave out that element in R and
in this implementation -1 means leave it out. Also normally
-3 mean leave out 3rd element but in the implementation
above -0 would be 0 so it would give the first element.
Probably best to just get used to the R way.
It looks to me like the index range starts at 1 in R. Is this true? If so, is there a way to change it to start at 0? That way, I wouldn't have to make so many changes when I translate a function from another language. -- View this message in context: http://www.nabble.com/index-range-tp15550797p15550797.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at 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.
You can define origin 0 objects yourself if you like. Here is a partial implementation: "[.orig0" <- function(x, i)
The 0 should be a 1.
if (is.numeric(i)) .subset(x, i+0) else .subset(x, i)
orig0 <- function(x)
structure(x, class = c("orig0", setdiff(class(x), "orig0")))
x <- orig0(1:5)
x[0:3] # 1:4
Note that usually 0 means leave out that element in R and
in this implementation -1 means leave it out. Also normally
-3 mean leave out 3rd element but in the implementation
above -0 would be 0 so it would give the first element.
Probably best to just get used to the R way.
On Feb 18, 2008 6:31 PM, hill0093 <hill0093 at umn.edu> wrote:
It looks to me like the index range starts at 1 in R. Is this true? If so, is there a way to change it to start at 0? That way, I wouldn't have to make so many changes when I translate a function from another language. -- View this message in context: http://www.nabble.com/index-range-tp15550797p15550797.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at 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.
Or see the "Oarray" package (note that's a letter O, not a zero!) Ben Bolker