Andrew,
I've never used OrdFacReg, but a glance at the documentation
suggests that you may have to pass your data through
prepareData() first. Suggestions:
1. run the example in the docs and see if you can
understand the bits and pieces;
2. is NB an ordered factor or is it just an integer vector?
use str();
3. must NB reside in a matrix?
-Peter Ehlers
Andrew Kosydar wrote:
Hi Dennis,
Thank you for your response. No, NB is not a matrix, and I have no
covariates. Here's a very small sample of the data:
effect NB
-0.003200 1
-0.120800 3
-0.003200 2
-7.690000 1
-1.442100 2
-0.000900 1
-0.014200 3
-5.015000 0
-0.001400 2
-0.008000 3
-2.337000 2
-0.004050 1
-0.101400 1
-0.002100 0
-0.003600 2
-0.002400 3
-1.123000 1
-0.000600 2
I am purely interested in whether an increase in "NB" (for ex: from 0 to
1, or 3 to 4) predicts a directional change with "effect".
Any advise is greatly appreciated.
Many thanks,
Andrew
On Tue, 9 Feb 2010, Dennis Murphy wrote:
Is NB a matrix? See the help page; you also have to specify which
covariate(s)
are ordinal.
HTH,
Dennis
On Tue, Feb 9, 2010 at 5:53 PM, Andrew Kosydar
<drewd...@u.washington.edu> wrote:
Hello All,
I have a dataset with a continuous response variable and
an ordered factor predictor. I am very interested in
using the package OrdFacReg to run my analysis, but I am
having a difficult time deciphering the code and making
it work for my dataset. Given that this is a new
package, I was unable to find any posts regarding
OrdFacReg or examples to use as a template. Normally, I
would run the analysis as an anova with the following
code:
NB.aov<-aov(effect~NB, data=LH.df)
To give you some background, "effect" is a continuous
variable and "NB" is ordered 0, 1, 2, 3, 4. I tried
each of following code to no avail:
ordFacReg(effect, NB)
ordFacReg(effect, NB, ordering="i", type="LS")
ordFacReg(effect, NB, fact, ordfact, ordering="i",
type="LS", intercept)
I truly appreciate any insights or suggestions on how to
best structure the code in order to perform an analysis
with ordFacReg.
Most Respectfully,
Andrew
Andrew Kosydar
University of Washington
Department of Biology
24 Kincaid Hall, Box 351800
Seattle, WA 98195
USA
______________________________________________
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and provide commented, minimal, self-contained,
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------------------------------------------------------------------------
______________________________________________
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.
--
Peter Ehlers
University of Calgary
______________________________________________
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.
