Bugs item #1587588, was opened at 2006-10-30 15:29
Message generated for change (Comment added) made by nobody
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Category: User Education
Group: None
Status: Open
Resolution: Invalid
Priority: 1
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Gregory Warnes (warnes)
Summary: RPy misinterprets "< 2.2e-16" as "-2.2e-16"

Initial Comment:
Interestingly, I reported this a few days ago and it has disappeared.

The basic problem is that ks.test() returns the p-value "< 2.2e-16" and 
RPy converts this in -2.2e-16 sometimes, and sometimes to 0.0.  It's 
hrd to say what it should return, but returning a negative value is 
certainly incorrect.  Probably +2.2e-16 would be the best choice.

This was using RPy version 0.4.6 and R version 2.2.1.

My earlier post was cluttered with other information which upon 
further investigation I found was not relevant.

I apologize if this is not the correct way to post bugs.  If not, please 
contact me at the 31031em at gmail.com, after reversing the order of 
the letters to the left of the @.


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Comment By: Nobody/Anonymous (nobody)
Date: 2006-10-30 18:33

Message:
Logged In: NO 

I was not able to figure out how to look at the closed error report so I 
reposted.  Thanks.  I have now read your info at the initial error 
report, and I understand it.  Thank you.

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Comment By: Gregory Warnes (warnes)
Date: 2006-10-30 18:10

Message:
Logged In: YES 
user_id=9316

This is a duplicate of bug report #1585977 which I closed
today.  See 

https://sourceforge.net/tracker/index.php?func=detail&aid=1585977&group_id=48422&atid=453021

to read why it isn't a problem with RPy.  Short summary: the
actual value in the R object *is* negative.  The R object
printing code converts it for *printing* to 'less than ...'.
        Since you are writing code that accesses the
contents of the object directly, you will need to write
wrapper code to handle negative values appropriately.


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You can respond by visiting: 
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