R help - Oct 2011 - nuisance variables

*Dear experts,*

Please excuse me for disturbing... Right now I am struggling with GLM a
bit... Would you be so kind to provide me a solution on using nuisance
variables. The problem is that I have data on Depression (volumetric
measurements of different brain regions) and I want to include age, gender
and education as nuisance parameters in the model. In the other words I
would like to model the model depression scores in respect to volumes,
considering the mentioned variables as nuisance ones.

Could you please tell me if this is correct (example data = "iris"):

Let's say, I want to "explain" Sepal.Length (independent variable)
by
Sepal.Width (dependent one) considering Petal.Width and Species as nuisance
variables... Therefor my code should be:


try = glm(Sepal.Length~Sepal.Width - Petal.Length - Species, data=iris);


 Sorry if it looks stupid... But I didn't manage to find any information on
nuisance variables in R...
-- 
*Best Regards,*
*Alexander Lebedev*

Stavanger University Hospital, Dept. of Psychiatry,
4011,  Armauer Hansens vei 20,
Stavanger, Norway.
researcher

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Sorry,
I didn't notice a mistake... Sepal.Length is a dependent variable
and Sepal.Width is an independent one...
---
Regards
Alex

2011/10/18 Alexander Lebedev <alexander.vl.lebedev@gmail.com>
> *Dear experts,*
>
> Please excuse me for disturbing... Right now I am struggling with GLM a
> bit... Would you be so kind to provide me a solution on using nuisance
> variables. The problem is that I have data on Depression (volumetric
> measurements of different brain regions) and I want to include age, gender
> and education as nuisance parameters in the model. In the other words I
> would like to model the model depression scores in respect to volumes,
> considering the mentioned variables as nuisance ones.
>
> Could you please tell me if this is correct (example data =
"iris"):
>
> Let's say, I want to "explain" Sepal.Length (independent
variable) by
> Sepal.Width (dependent one) considering Petal.Width and Species as
> nuisance variables... Therefor my code should be:
>
>
> try = glm(Sepal.Length~Sepal.Width - Petal.Length - Species, data=iris);
>
>
>  Sorry if it looks stupid... But I didn't manage to find any
information on
> nuisance variables in R...
> --
> *Best Regards,*
> *Alexander Lebedev*
>
> Stavanger University Hospital, Dept. of Psychiatry,
> 4011,  Armauer Hansens vei 20,
> Stavanger, Norway.
> researcher
>


-- 
*Best Regards,*
*Alexander Lebedev*

Stavanger University Hospital, Dept. of Psychiatry,
4011,  Armauer Hansens vei 20,
Stavanger, Norway.
researcher

Tel.: +47-481-21-855
Skype ID: alexander.vl.lebedev

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