Please read the Posting Guide. Several of your questions will get
answered, including why the attachment did not arrive at any of out
mail clients.
We are having some difficulty understanding why you say your lecturer
"didn't teach us anything about how to use R". It appears from the
mangled version of the pasted assignment, that your lecturer _is_
trying to teach you something by give an entirely worked script. Are
you perhaps copying the ">" symbols into a console session that is not
set up to accept such? Or have the data in the wrog location. Who of
us can possibly know?
I suspect the bottom line is that you need to go to your lecturer's
office hours, since this list is not set up for basic R tutoring.
--
David.
On May 17, 2010, at 9:07 AM, APOLLOCHEROKEE wrote:
Dear Sir or Madam: Hi,sorry for disturbing you. Currently,
I'm a master student, and my lecturer didn't teach us anything about
how to use R. But the assignment is all about R. So even a very
stupid error,I still can't tell. So please forgive my innocence.
The following is the requirement of my assignment
you will read in the data> > uscpi <- read.table("C:/Users/APOLLO/
Desktop/ECC4660/A2/uscpi.csv",header=T,sep=",")> > # Now compute a
variable called ss, short for subscript, which you> # can use to
index your variables, which will be useful for differencing> > ss <-
length(uscpi$year)> > # Compute what Julie Smith would refer to as
the "1 year-ahead consumer> # price index" as simply the log of the
price ratio between now and next> # year's observation> > inf <-
log(uscpi$usdcpi2000[2:ss]/uscpi$usdcpi2000[1:(ss-1)])> > # You can
take a look at the data with the following code> > plot(uscpi
$year[2:ss],inf,type="b",ylim=c(0,0.15))error in xy.coords(x, y,
xlabel, ylabel, log) : 'x' and 'y' lengths differ
Could you please tell me what's wrong with it? I have attached my
data in this assignment.
Thank you very much
Best regards
_________________________________________________________________
David Winsemius, MD
West Hartford, CT
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