Hello Halfdan, The "Compute an expression on every row" tool supports basic Python language constructs. There is extensive on-line documentation describing these, perhaps a good one to start with is: http://docs.python.org/library/stdtypes.html Greg Von Kuster Galaxy Development Team Halfdan Rydbeck wrote:

What are the possible computations and what are the commands for “Compute <http://main.g2.bx.psu.edu/tool_runner?tool_id=Add_a_column1> an expression on every row”? Thanks!

Halfdan Rydbeck

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