readITI: Read Infaunal Trophic Index File
Description
This function reads and checks files containing Infaunal trophic index
data (Gittenberger et al., 2011)Details
The function performs the following tasks:
- checks the existence of
filename;
- checks availablitity of required columns (case insensitive);
- removes redundant spaces;
- removes duplicated records.
- checks if all ITI classes are I, II, III, or IV