Pairwise comparisons with different TDF's

[Laura Agusto]

Dear all,

Would anyone know how to perform pairwise comparisons of TP's calculated using 4 different TDF's? :) 

Thanks so much in advance,

Laura E. Agusto

PhD candidate

https://www.imeco-lab.com/

Mangrove Ecology and Evolution Lab,

Environmental Geochemistry and Oceanography Research Group, 

The Swire Institute of Marine Science,

The University of Hong Kong,

Cape D'Aguilar, Shek O, Hong Kong

Tel: +852 2809 2179 

Email: lag...@hku.hk

[Claudio Quezada Romegialli]

Dear Laura

If you use multiSpeciesTP() or multiModelTP() to calculate trophic position, then the object you use to store the output has a "TPs" object which is a list. You just have to combine the output of your different TPs calculated with different TDFs and compare them as usual with a logical test (< or <=, > or >=) or the Bhattacharyya coefficient (bhat).

For example

object1 <- multiSpeciesTP()

object2 <- multiSpeciesTP()

combined_list <- do.call(c, list(object1$TPs, object2$TPs))

pairwiseComparisons(combined_list, "bhat")

If you have any questions, please let me know.

Best wishes,

Claudio

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To download tRophicPosition package visit https://github.com/clquezada/tRophicPosition
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Dr. Claudio Quezada-Romegialli
Profesor Asociado
Departamento de Biología
Facultad de Ciencias Naturales y Exactas
Universidad de Playa Ancha, Valparaíso, Chile
Móvil: +56 9 9038 0148
Teléfono: +56 32 250 0519