On Nov 17, 2010, at 9:26 AM, Alaios wrote:
It seems that I am confusing something:
List of 50
$ :List of 2
..$ CRmap: logi [1:100, 1:100] NA NA NA NA NA NA ...
..$ xy : num [1:2] 21 11
$ :List of 2
..$ CRmap: logi [1:100, 1:100] NA NA NA NA NA NA ...
..$ xy : num [1:2] 80 68
lapply( Mystruct, "[", "xy") # should return a list with "xy" elements
Le 11/17/2010 14:56, Alaios a écrit :
Thanks a lot for your helpful answer.
In my case now I have implemented some "struct" with the following
structure
Mystruct.Map
Mystruct.xy
If I do Mystruct[2].$xy I get correctly the xy values of the second
item.
It shouldn't. That extra period should mess things up. There is no ".
$" operator.
--
David.
I want now to print all the $xy fields of the Mystruct[[]]
I tried
Mystruct[data.frame(a=1:5)]]$xy which returns the following message:
invalid subscript type 'list'
I would like to thank you again for your support
Regards
Alex
--- On *Wed, 11/17/10, Ivan Calandra /<ivan.calan...@uni-
hamburg.de>/*
wrote:
From: Ivan Calandra <ivan.calan...@uni-hamburg.de>
Subject: Re: [R] Give me all operator
To: r-help@r-project.org
Date: Wednesday, November 17, 2010, 1:44 PM
Hi Alex,
Is that what you're looking for:
> df <- data.frame(a=LETTERS[1:5], b=rnorm(5))
> df
a b
1 A -0.2401323
2 B -0.9414998
3 C 0.4289836
4 D 1.9802749
5 E -0.6993612
> df[3,2]
[1] 0.4289836
> df[3,]
a b
3 C 0.4289836
> df[,2]
[1] -0.2401323 -0.9414998 0.4289836 1.9802749 -0.6993612
> df[,2, drop=FALSE]
b
1 -0.2401323
2 -0.9414998
3 0.4289836
4 1.9802749
5 -0.6993612
See ?"[" for help. In short, in R you use "[", not brackets as
in
matlab
(from your example, I've never used it). You don't need the
":", you
just don't write anything in R.
Ivan
Le 11/17/2010 14:34, Alaios a écrit :
> Hello is there in R any operator that give you all the data
of a
matrix
> for example in matlab
>
> x(2,3) returns the 2ndth row and 3rdth column
> x(2,:) returns all the columns of the 2nd row.
>
> In R now I would like to print all the
>
> CRagent[[i]][2]
>
>
> CRagent[[:]][2] doesnot work of course. Other option is to
make a loop with an index i that spans from 1:last element of
CRagent[[]] but this is not that optimal.
>
> I would like to thank you in aavance for your help
> Best Regards
> Alex
>
>
>
>
> [[alternative HTML version deleted]]
>
>
>
> ______________________________________________
> R-help@r-project.org </mc/compose?to=r-h...@r-project.org>
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> PLEASE do read the posting guide
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code.
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
</mc/compose?to=ivan.calan...@uni-hamburg.de>
**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php
______________________________________________
R-help@r-project.org </mc/compose?to=r-h...@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.
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php
______________________________________________
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.
[[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.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
