[R] Error Message During ANOVA
I know this is several years later but... I ran into the same issue and was able to solve it by verifying the spacing between variables within original text file. For example, Item1, Item2, and Item3 had a single space between them while the numbers in each item had 5 spaces between them, resulting in a mismatch between r and tm. Hope this helps somebody. Chris __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
Re: [R] Error Message During ANOVA
I am teaching myself R for use in Psych research. I don't understand the error
message I am getting or how to fix it. Any suggestions will be greatly
appreciated
df1=read.table(fastfood.txt, header=TRUE); df1
c(t(as.matrix(df1)))
r = c(t(as.matrix(df1))) # response data
r
f=c(item1,item2, item3)
k=3
n=6
tm =gl(k,1, n*k, factor(f))
tm
[1] item1 item2 item3 item1 item2 item3 item1 item2 item3 item1 item2 item3
[13] item1 item2 item3 item1 item2 item3
Levels: item1 item2 item3
av=aov(r~tm)
Error in model.frame.default(formula = r ~ tm, drop.unused.levels = TRUE) :
variable lengths differ (found for 'tm')
Thanks in advance
Harold Rodinsky PhD
Associate Professor
Department of Psychology
University of the Incarnate Word
4301 Broadway
San Antonio, TX 78209
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] Error Message During ANOVA
-Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Rodinsky, Dr Harold R. Sent: Thursday, March 21, 2013 11:32 AM To: 'r-help@r-project.org' Subject: Re: [R] Error Message During ANOVA I am teaching myself R for use in Psych research. I don't understand the error message I am getting or how to fix it. Any suggestions will be greatly appreciated df1=read.table(fastfood.txt, header=TRUE); df1 c(t(as.matrix(df1))) r = c(t(as.matrix(df1))) # response data r f=c(item1,item2, item3) k=3 n=6 tm =gl(k,1, n*k, factor(f)) tm [1] item1 item2 item3 item1 item2 item3 item1 item2 item3 item1 item2 item3 [13] item1 item2 item3 item1 item2 item3 Levels: item1 item2 item3 av=aov(r~tm) Error in model.frame.default(formula = r ~ tm, drop.unused.levels = TRUE) : variable lengths differ (found for 'tm') It looks like you are working way too hard to run your anova. First, the posting guide (see link at bottom or emails) asks you to provide a reproducible example. The error message states that r and tm have different lengths. At a minimum, we need to see what the df1 looks like. Show us the output of str(df1) so we can understand what your commands are doing. Without more information there is not much we can do to help. Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 __ 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.
Re: [R] Error Message During ANOVA
Hello, The first error message says: Error in model.frame.default(formula = r ~ tm, drop.unused.levels = TRUE) : variable lengths differ (found for 'tm') Please compare the size of 'r' and 'tm'. Regards, Pascal Le 14/02/2013 07:14, Craig O'Connell a écrit : Dear R-Help, I'm using an ANOVA to determine if there is any variation that exists between my four different shark-types and their entrance behavior towards an apparatus. To do this, my coding was: df1=read.table(lemonentrance.txt, header=TRUE); df1 c(t(as.matrix(df1))) r = c(t(as.matrix(df1))) # response data r f=c(Con,Bro,OEy,Bli) k=4 n=6 tm=gl(k,1,n*k,factor(f)) tm av=aov(r~tm) Error in model.frame.default(formula = r ~ tm, drop.unused.levels = TRUE) : variable lengths differ (found for 'tm') summary(av) Error in summary(av) : object 'av' not found As you can see, I receive two error message, with teh second being a cause of the first. Does anybody have any idea how I can fix this, or at least would you happen to know what the error is referring to? Thanks and a response would be greatly appreciated. Kind Regards, Craig __ 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.
