HEEELP!!!!
Ana Mar?a Prieto wrote:
Hello.
My name is Ana. I?m doing an eology master, and I?m just learning how R
works.
I have a Mac OS X 10.5.6, and I?m tryng to run just a simple ANOVA
nanalyses.
I dowloaded R version 2.10.0, and it seems I have problems with the
script.
I don?t know what to do, I?ve already change the languages, be sure of
being
working in the correct directory and doesn?t work
the script is:
#1. example
data01<-read.table("ch01.txt",header=T)
names(data01)
attach(data01)
FERTIL<-factor(FERTIL)
model01<-(YIELD~FERTIL)
summary(model01)
anova(model01)
all my classmates, even those with a mac operator, wrote the same, and it
worked.
Well, the line: model01 <- (YIELD~FERTIL) Creates an object of class "formula", which is not a model. A formula only expresses a relationship between variables, a model consists of a formula that has been fit to a data set. The anova() function has no meaning for formula objects since no data has been fit. If you wanted a linear model, use the lm() function to create it: model01 <- lm( YIELD ~ FERTIL ) Non-linear functions may be fit using nls() and R has plenty of other fitting schemes if you should require them.
Ana Mar?a Prieto wrote:
When copying the script in the R console, it seems that there is a problem with the ~ symbol. this symbol is not in the keyboard, so I select it from spetial characters, and then i selected with shift an <>key, and still, it doesn?t works
On my keyboard the '~' character is accessed by pressing SHIFT-backtick, where backtick is the key above the "Tab" key and to the left of the "1" key. You may have a different keyboard.
Ana Mar?a Prieto wrote:
I attached th file with the data. i hope you can help me!!!!! Ana.
----- Charlie Sharpsteen Undergraduate Environmental Resources Engineering Humboldt State University
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