Pls. Help.

Just a knime beginner. I just want to ask how can I loop over the columns to perform calculation which can use less Math formula node. I dont have multi-column(math formula) that’s why I need another method. Thank you in advance. Attached is the workflow. test4.knwf (13.8 KB)

Also, what I need is to first get the average per column in table 1 and then, divide to the values in table 2 which takes value which the column name equals the first letter.
For ex. if column(tab2) like first letter of column (tab1) , Mean(column(tab1)) / column(tab2).
Thank you in advance.

Please follow the original topic here: