data
A numeric matrix with entities $i$ in the rows and categories $j$ in the columns. Cells show the respective value (value of abundance) of entity $i$ in the category $j$. It can also be a transpose of the previous matrix, that is, a matrix with categories
category_row
A flag to indicate that categories are in the rows. The analysis assumes that the categories are in the columns of the matrix. If the categories are in the rows and the entities in the columns, then the parameter "category_row" has to be set to TRUE. The