I tried command as.numeric(Qty) #converting column"Qty" in object "demand" to numeric. However it remains a non-numeric value. What is the best way to convert a column of data to a numeric value in R? What is the best way to convert dates into a numeric format (or some format able to be used in an x,y scatter) while still maintaining its inherent "date" property? StatBat2 -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Struckmeier, Nathanael Sent: Friday, May 27, 2011 1:57 PM To: Bert Gunter Cc: R-help at r-project.org Subject: Re: [R] FW: Unable to Plot using headers.
is.numeric(demand)
[1] FALSE
is.numeric(Qty)
[1] FALSE
is.numeric(Date)
[1] FALSE Doesn't look like they are numeric. I'll try and convert them and check back if I have problems. Thanks Gunter! Thank You Nathan Struckmeier Supply Chain Planning Office 541-864-5029 NStruckmeier at HarryandDavid.com 2500 S. Pacific Hwy, Medford OR, 97501 Daily Humor: Chuck Norris can slam a revolving door.... -----Original Message----- From: Bert Gunter [mailto:gunter.berton at gene.com] Sent: Friday, May 27, 2011 1:47 PM To: Struckmeier, Nathanael Cc: R-help at r-project.org Subject: Re: [R] FW: Unable to Plot using headers. Are Date and Qty numeric? Check. -- Bert On Fri, May 27, 2011 at 1:43 PM, Struckmeier, Nathanael
<NStruckmeier at harryanddavid.com> wrote:
-----Original Message----- From: Struckmeier, Nathanael Sent: Friday, May 27, 2011 1:39 PM To: 'stephen's mailinglist account' Subject: RE: [R] Unable to Plot using headers. Thanks for the input. Despite both graphing directly and with "attach"
I
am still getting a screwed up graphical output as well as an error. My table is object "demand" w/ columns Date and Qty Plot(demand$Qty, demand$Date) Attach(demand) Plot(Qty, Date) Both of these commands produce something completely different (and
quite
odd) from a simple xy scatter. X-axis should be "date" and Y-axis
should
be "Qty". The table "demand" was imported into R sorted by date. Upon graphing, the X-axis displays dates but they are out of order and the graph is a black box... -----Original Message----- From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org]
On Behalf Of stephen's mailinglist account Sent: Friday, May 27, 2011 12:39 PM To: Jonathan Daily Cc: R-help at r-project.org Subject: Re: [R] Unable to Plot using headers. On 27 May 2011 20:25, Jonathan Daily <biomathjdaily at gmail.com> wrote:
I would caution against using attach(), however, if you are not in an
interactive session. In functions and scripts, errors can often cause
the interpreter to exit before the detach(), leaving your data on the
search path. 99% of all attach/detach cases can be handled by ?with
and ?within. The issue with attach can be seen in this example:
dat <- data.frame(a = 1, b = 2)
test <- function(x){
attach(dat)
if(x) stop("STOP")
print(a)
print(b)
detach(dat)
}
a
test(F)
a
a
test(T)
a
fair point I tend to opt for the dat$a or dat$b form personally anyway, but was defaulting back to some of the instructional texts I read early on. -- Stephen
______________________________________________ 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. ______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
"Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics ______________________________________________ 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.