Download the energy efficiency dataset from https://archive.ics.uci.edu/ml/datasets/Energy+efficiency.
The dataset is in Excel's XLSX format, which cannot be read by Weka. We can convert it into a comma-separated value (CSV) format by clicking on File | Save As and picking .csv in the saving dialog, as shown in the following screenshot. Confirm to save only the active sheet (since all of the others are empty), and confirm to continue, to lose some formatting features. Now, the file is ready to be loaded by Weka:
Open the file in a text editor and inspect whether the file was correctly transformed. There might be some minor ...
