Thanks!
From: Peter Alspach-2 [via R]
[mailto:ml-node+3618799-1094957657-247...@n4.nabble.com]
Sent: Wednesday, June 22, 2011 9:27 PM
To: Bendik, Nathan
Subject: Re: Subsetting data systematically
Tena koe Nate
You can use the fact that R recycles. If yourData is a
dataframe, then (as examples):
yourData[c(TRUE,FALSE),] will give you every second row,
starting with the first. Similarly,
yourData[c(FALSE,TRUE,FALSE),] will give every third row,
starting with the second; and
yourData[c(TRUE, rep(FALSE,19)),] will give every twentieth row,
starting with the first.
There's also seq().
HTH
Peter Alspach.
-Original Message-
From: [hidden email] [mailto:r-help-bounces@r-
project.org] On Behalf Of gibberish
Sent: Thursday, 23 June 2011 11:05 a.m.
To: [hidden email]
Subject: [R] Subsetting data systematically
I would like to subset data from a larger dataset and generate
a
smaller
dataset. However, I don't want to use sample() because it
does it
randomly.
I would like to take non-random subsamples, for example, every
2nd
number,
or every 3rd number. Is there a procedure that does this?
Thanks, Nate
--
View this message in context:
http://r.789695.n4.nabble.com/Subsetting-
data-systematically-tp3618516p3618516.html
Sent from the R help mailing list archive at Nabble.com.
__
[hidden email] 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.
The contents of this e-mail are confidential and may be subject
to legal privilege.
If you are not the intended recipient you must not use,
disseminate, distribute or
reproduce all or any part of this e-mail or attachments. If
you have received this
e-mail in error, please notify the sender and delete all
material pertaining to this
e-mail. Any opinion or views expressed in this e-mail are
those of the individual
sender and may not represent those of The New Zealand Institute
for Plant and
Food Research Limited.
__
[hidden email] 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.
If you reply to this email, your message will be added to the
discussion below:
http://r.789695.n4.nabble.com/Subsetting-data-systematically-tp3618516p3
618799.html
To unsubscribe from Subsetting data systematically, click here
http://r.789695.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscrib
e_by_codenode=3618516code=bmF0aGFuLmJlbmRpa0BjaS5hdXN0aW4udHgudXN8MzYx
ODUxNnwyMDc3MzAzODgz .
--
View this message in context:
http://r.789695.n4.nabble.com/Subsetting-data-systematically-tp3618516p3623467.html
Sent from the R help mailing list archive at Nabble.com.
[[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.
