Modify a data set definition
You can modify existing data set definitions and save them under another name.
Once you have defined a data set that extracts the information that you want to analyze and chart, you may want to modify it in minor ways.
Note: If
you change the TSV file name, this will create a new data set definition. If you change
the column definition information without changing the TSV file name, you will overwrite
the existing data set definition.
If you kept the original TSV file name, then your original data set definition will be overwritten.