what is the best way how to add the vlues from the NumPix colums based on the value for the CentroidTime?
Example: The first 2 rows have the entry 0 --> the two values for the columns NumPix shlould be added together (sum) and places in a new table. The resulting table should habe the same columns, but only contain the summarized values.
Use GroupBy node. Group Column is CentroidTime and Aggregation is sum on Num Pix column. Also chose for Column Naming Keep original name(s). That should do the trick if I understood what are you trying to do.