Compute an expression on every row

Add_a_column1

Version Tool Shed Owner Galaxy instances where the tool is available
1.2.0 toolshed.g2.bx.psu.edu devteam
1.1.0 toolshed.g2.bx.psu.edu devteam
1.1.0 toolshed.g2.bx.psu.edu devteam
1.1.0 Tool version not installed from a tool shed.
It may not be suitable for reproducible research.
?