in english: "why?"

to -> too

to -> too

Ok. We can remove these comments.

use range based for-loop here.

this vector doesn't seem to be used. Maybe you can remove it as part of your next patch here.

check indentation here.

this check is obsolete since it must be always a Spreadsheet. You can add an assert here maybe.

QVector instead of QList. Not a big difference here, just a matter of convention in the code.

we allow to trigger this "Generate data from function values" also on integer columns. Since the results of the such calculations are floating point number usually, we convert here to Numeric.

we can work with references here.

what happens now if m_spreadsheet->rowCount() < maxRowCount?

You removed the usage of ExpressinParser here. We can remove the include "EvaluationParser.h" in this file, too.

sorry is a mistake