I compare my results against a result-base, but keep on getting different results than the resultbase, even though I have their data.
I wonder if it is hard to get the same results and why, maybe because they invoked it from a java programme and I do it in the GUI and with ARFF files, which should be troublesome and not developed at right now.
My question is - The results of a AUCROCcurve made from ELKI - would the result vary, if I invoked it from a java programme and not as I do now from the GUI. I would like to get precise results and know I do it right.
Results from the MiniGUI are precise.
The UI is an assistant for building a command line, but that doesn't introduce any imprecision. It may introduce some performance cost when e.g. -verbose is used. The visualization may cause memory problems after the algorithm has finished.
Obviously, the input format (CSV; ARFF) shouldn't have any impact on the outcome. Unless you introduce incorrect additional columns, e.g. an id column that should not be used for analysis...