Using Python for Field calculator?

Can you use regular expression in field A in calculator?

Summary. The Field Calculator (Regular Expression) Processor can be used to leverage the power of regular expressions to identify a pattern within a target field and extract the substrings from received events.

What is the use of field calculator command?

The Field Calculator works on string, number, and date fields and automatically calculates selected records if the layer or table has a selection set present. Start an edit session. You can make calculations without being in an editing session; however, in that case, there is no way to undo the results.

How do you calculate field GIS?

To open the Field Calculator, open an attribute table or other table in ArcMap. Right-click on the name of the field to be edited and select Calculate Values. To calculate on all records in a table, do not se- lect any records or select all records. To calculate only on one record, click on that record.