[R-sig-ME] Mixed model for ordinal data with pseudo replication

[Mehdi Abedi]

Dear all,
I checked my previous mail and add more details about data. My data include:

1.Grassland management treatment: it include 6 grassland management
treatments including grazing, exclosure from grazing, plowing and planting
sites.

2. Plant functional groups: it include 5 functional group including
annuals, perennial grasses, perennial forbs, half shrubs and shrubs. These
groups were selected in each treatments. therefore you can find different
groups in treatments depend to concurrence in certain treatments.

  Treatments  Functional group  Grazing Half shrub  Grazing Perrenial forb
Grazing Perrenial forb  Grazing Shrub  Grazing Bare soil  Exclusure Perrenial
grass  Exclusure Half shrub
 Exclusure Perrenial forb  Exclusure Bare soil  Exclusure Perrenial grass
Plowing Annual  Plowing Annual  Plowing Perrenial grass  planting Half shrub
planting Annual  planting Half shrub  planting Half shrub  planting Half
shrub

3. 11 soil surface indicators measured with 5 replicate in each functional
groups. These data are ordinal from 0-5 expect for one indicator which is
continuous.


I am interested to have a model for each 11 indicator separately which
treatments is fixed effect and functional groups may be as random effect (i
am not sure is it just simple random effect or may i need to consider as
nested..).

It would be my pleasure to have your advice.
Warm regards,
Mehdi


On Thu, Aug 21, 2014 at 12:16 PM, Mehdi Abedi <abedimail at gmail.com> wrote:

> Dear all,
> I want to compare 11 soil surface indicator in different treatments and if
> possible for species. It would be my pleasure to have your advice for my
> data analysis. First, i have two factors including treatments and species
> which each treatments include different species. Can we use mixed model for
> data analysis?!
>
>  In addition, these 11 soil indicator are ordinal from 0-5 and also has
> pseudo replication. Do you have suggestion for data analysis with lme4 or
> other proper models?
>
> You can find in the attached file my data as csv file.
> Warm regards,
> Mehdi
>
>


-- 


*Mehdi Abedi Department of Range Management*

*Faculty of Natural Resources & Marine Sciences *

*Tarbiat Modares University (TMU) *

*46417-76489, Noor*

*Mazandaran, IRAN *

*mehdi.abedi at modares.ac.ir <Mehdi.abedi at tmu.ac.ir>*

*Homepage
<http://www.modares.ac.ir/en/Schools/nat/Academic_Staff/~mehdi.abedi>*

*Tel: +98-122-6253101 *

*Fax: +98-122-6253499*

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