openmolecules.org Forum: Cheminformatics

Home » DataWarrior » Cheminformatics » p value in box plots ( p = 0 meaning)

Show: Today's Messages :: Polls :: Message Navigator

p value in box plots [message #893]

Sun, 10 May 2020 10:16

sansun
Messages: 50
Registered: April 2019

Member

While generating box plots I got p valaue = 0 which, as per my understanding, is not possible.

Is it because of the various small value (e.g. 0.0001), DW is rounding it off to 0?

Report message to a moderator

Re: p value in box plots [message #901 is a reply to message #893]

Tue, 12 May 2020 13:08

thomas
Messages: 742
Registered: June 2014

Senior Member

The p value is calculated using the TTest class from the Apache commons math project,
and therefore should be reliable. You are right that DataWarrior's 2D-view formatting
to x.xxxx is responsible for the 0 value. p values below 0.00005 are rounded to 0.

Report message to a moderator

Re: p value in box plots [message #905 is a reply to message #901]

Wed, 13 May 2020 15:04

sansun
Messages: 50
Registered: April 2019

Member

Thanks for your reply.

Report message to a moderator

Previous Topic:	Aromatic Amines
Next Topic:	TFA salts

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Feb 27 12:49:03 CET 2026

Total time taken to generate the page: 0.00640 seconds