I am very new to R, so sorry that I ask stupid things. I want compare a Matrix row by row and at the end I want to a Matrix with the Levenshtein-Distance. Example: The Data (Learningpath in a E-Learning-System): 5 12 24 35 1 24 35 3 35 35 45 35 Now I need a comand, which compare the first line with the second, then with the third and write the result in a new Matrix. I found many Funktion in R, but all compare Strings, but I have numbers. After that I want to use the ward-argorithm at the result. Can anyone give me a hint, I am at the end with my nervs. Joerg -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.