

Dear list members, 

I have two data sets (sites by species) with some sites in common, one with invertebrate data (X) and one with diatoms data (Y). I would like to get both new Xc and Yc matrices showing only those sites common to X and Y, to make similarity matrices and perform a mantel test. Hope you can help me with this,

Many thanks in advance, 

Andrés

Dr. Andrés Mellado Díaz

Center for Hydrological Studies CEH-CEDEX
Water Quality Department
Pº bajo de la Virgen del Puerto, 3
28005, Madrid
SPAIN
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