On Apr 10, 2012, at 11:53 AM, Steve Lavrenz wrote:
Albyn,
Thanks for your help. This however, still assumes that I have to
define an
array of length 10. Is there a way that I can construct this so that
my
array is exactly as long as the number of spots I need to reach my
threshold
value?
> seq(0,100, by=5)
[1] 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
80 85 90 95 100
Thanks,
-Steve
-----Original Message-----
From: Albyn Jones [mailto:jo...@reed.edu]
Sent: Tuesday, April 10, 2012 11:46 AM
To: Steve Lavrenz
Cc: r-help@r-project.org
Subject: Re: [R] Creating a loop with an indefinite end term
Here are a couple of constructions that work.
albyn
===========================================
num <- rep(0,10)
for (i in 2:10) {
num[i] <- num[i-1] + 5
if(num[i] > 20) break
}
num
[1] 0 5 10 15 20 25 0 0 0 0
or
num <- rep(0,10)
done <- FALSE
i <- 2
while(!done){
num[i] <- num[i-1] + 5
if(num[i] > 20) done <- TRUE
i <- i + 1
}
num
[1] 0 5 10 15 20 25 0 0 0 0
On Tue, Apr 10, 2012 at 10:48:34AM -0400, Steve Lavrenz wrote:
Everyone,
I'm very new to R, especially when it comes to loops and functions,
so
please bear with me if this is an elementary question. I cannot seem
to figure out how to construct a loop which runs a function until a
certain value is computed. For example, say I have the following:
num = numeric (10)
num [1] = 0
for (i in 2:10) {
num [i] = num [i-1] + 5
}
This adds 5 to the preceding spot of a vector of length 10 to get the
value in the current spot. However, say I don't just want to run this
for 10 spots; rather I want to run it until a certain value (say,
100) is
computed.
How I construct my loop to do this?
Thanks!
[[alternative HTML version deleted]]
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--
Albyn Jones
Reed College
jo...@reed.edu
______________________________________________
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.
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.
