One place that talks about what Bill says is:
http://www.burns-stat.com/documents/tutorials/impatient-r/more-r-key-objects/more-r-numbers/
Pat
On 22/01/2013 17:35, William Dunlap wrote:
I was wondering
why I don't get an integer vector or and integer matrix with the following
code:
z <- c(1, 2:0, 3, 4:8)
typeof(z)
[1] "double"
It is because the literals 1 and 3 have type "double". Append "L" to make
them literal integers.
> typeof(c(1L, 2:0, 3L, 4:8))
[1] "integer"
The colon function (":") returns an integer vector if it can do so without
giving
a numerically incorrect answer.
> typeof(1.0:3.0)
[1] "integer"
> typeof(1.5:3.5)
[1] "double"
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf
Of Lourdes Peña Castillo
Sent: Tuesday, January 22, 2013 9:26 AM
To: r-help@r-project.org
Subject: [R] c(), rbind and cbind functions - why type of resulting object is
double
Hello Everyone,
I am using R 2.15.0 and I came across this behaviour and I was wondering
why I don't get an integer vector or and integer matrix with the following
code:
z <- c(1, 2:0, 3, 4:8)
typeof(z)
[1] "double"
z <- rbind(1, 2:0, 3, 4:8)
Warning message:
In rbind(1, 2:0, 3, 4:8) :
number of columns of result is not a multiple of vector length (arg 2)
typeof(z)
[1] "double"
z <- matrix(c(1, 2:0, 3, 4:8), nrow = 5)
typeof(z)
[1] "double"
Shouldn't be typeof integer? According to the online help if everything is
integer the output should be integer.
But if I do this, I get an integer matrix.
z <- matrix(1:20, nrow = 5)
typeof(z)
[1] "integer"
Thanks!
Lourdes
[[alternative HTML version deleted]]
______________________________________________
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.
--
Patrick Burns
pbu...@pburns.seanet.com
twitter: @portfolioprobe
http://www.portfolioprobe.com/blog
http://www.burns-stat.com
(home of 'Impatient R' and 'The R Inferno')
______________________________________________
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.
