What Are The Possible Computations And What Are The Commands For "Compute An Expression On Every Row"? Thanks!

Heads up! This is a static archive of our support site. Please go to help.galaxyproject.org if you want to reach the Galaxy community. If you want to search this archive visit the Galaxy Hub search

Latest

Open

RNA-Seq

ChIP-Seq

SNP

Assembly

Forum

Planet

All »

Home

Welcome to Galaxy Biostar! User support for Galaxy! about • faq • rss

Community

Log In

Sign Up

Add New Post

Question: What Are The Possible Computations And What Are The Commands For "Compute An Expression On Every Row"? Thanks!

9.3 years ago by

Halfdan Rydbeck • 10

Halfdan Rydbeck • 10 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

• 754 views

ADD COMMENT • link •

modified 9.2 years ago by Greg Von Kuster • 840 • written 9.3 years ago by Halfdan Rydbeck • 10

9.2 years ago by

Greg Von Kuster • 840

Greg Von Kuster • 840 wrote:

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

ADD COMMENT • link written 9.2 years ago by Greg Von Kuster • 840

Hi Greg:

Maybe this is out of date. Based on the following experiment, I think there must be some limitations on which python expressions are supported.

e.g. when i attempt to calculate this value str(c2)[11] of a tabular field galaxy reports

Invalid expression

So at least python's slice feature is not available. (or I've misunderstood something).

ADD REPLY • link written 3.7 years ago by Brad Langhorst • 100

Please log in to add an answer.

Similar posts • Search »