Suggestions for improvement
I downloaded the trial version recently and I really like the program in general, however some features make the usage awkward for my work.
1. Missing values are not accepted.
Data frequently includes missing cells. These cannot just be deleted from the spreadsheet, nor can they be replaced by zero values whithout manipulating data contents. It would be helpful if StatistiXL could handle missing values like other programs.
2. Selection of data range
It would be very helpful if colums coul be selected which are not neighbouring. In a large dataset I would like to compare multiple colums (e.g. by correlation) at a time which are not neighbouring. Such selection is possible in Excel.
3. Spearman correlation
It would be nice to select more than just two columns. Other packages can do this.
4. Test for normal distribution
It is awkward that frequency data is required. Other packages transform the data accordingly in one step. In StatistiXL I have to go through frequency distribution first. This again is awkward because zero frequency cells are required at the beginning and the end. This is not done automaticly. The whole proceedure could be improoved a lot.
All other features are very good. Usage is very intuitive and easy to handle (better than in many other programs). Exact p values are calculated in nonparametric tests, very nice!
I will definitely watch further development of the program and buy it once it meets my demands.
Dr. V. Witte, LMU, Munich