[R] ANOVA error

From: Dani Valverde <daniel.valverde_at_uab.cat>
Date: Thu, 19 Jun 2008 10:54:12 +0200


Hello,
I have a dataframe named myMatrix with the structure

Treatment Time Cr mIb ...

Being the treatment and time the predictors and Cr, mIb and so on the response variables. When I call

Cr.aov <- aov(Cr~Treatment, data=myMatrix)

I got this error:

Error in storage.mode(y) <- "double" :
  invalid to change the storage mode of a factor In addition: Warning message:
In model.response(mf, "numeric") :
  using type="numeric" with a factor response will be ignored

Can anyone help me? I take the chance to ask another question. I would like to perform an ANOVA on different variables. Is the call aov(Cr+mIb+...~Treatment, data=myMatrix) o correct way of doing it? What I would like to have is a p value for the variance for each response variable.
Best,

Dani

-- 
Daniel Valverde Saubí

Grup de Biologia Molecular de Llevats
Facultat de Veterinària de la Universitat Autònoma de Barcelona
Edifici V, Campus UAB
08193 Cerdanyola del Vallès- SPAIN

Centro de Investigación Biomédica en Red
en Bioingeniería, Biomateriales y
Nanomedicina (CIBER-BBN)

Grup d'Aplicacions Biomèdiques de la RMN
Facultat de Biociències
Universitat Autònoma de Barcelona
Edifici Cs, Campus UAB
08193 Cerdanyola del Vallès- SPAIN
+34 93 5814126

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Received on Thu 19 Jun 2008 - 08:58:33 GMT

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