Thiago,
It's all about indexing:
rn <- union(rownames(matrix1), rownames(matrix2))
cn <- union(colnames(matrix1), colnames(matrix2))
x <- array(0, dim=c(length(rn), length(cn)), dimnames=list(rn, cn))
x[rownames(matrix1), colnames(matrix1)] <- matrix1
x[rownames(matrix2), colnames(matrix2)] <- ma
Dear all,
I have two species-by-site matrices and I'd like to combine them in one
matrix. The rows (n=20) of each matrix present plants 1-20. So, the new
matrix should have 40 rows. As these matrices have some shared species and
some exclusive species, the new matrix should have the species from t
