# [R] OrdFacReg

Andrew Kosydar drewdogy at u.washington.edu
Wed Feb 10 05:33:36 CET 2010

```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".

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
>> <drewdogy at 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
>>
>>       ______________________________________________
>>       R-help at r-project.org mailing list
>>       https://stat.ethz.ch/mailman/listinfo/r-help
>>       http://www.R-project.org/posting-guide.html
>>       and provide commented, minimal, self-contained,
>>       reproducible code.
>>
>>
>>
>>
>
```