
Hi Ritesh
***please note Ritesh always mark a copy to the R-help mailing list :) ***

Please visit this link to get help in R
http://rocr.bioinf.mpi-sb.mpg.de/ROCR_Talk_Tobias_Sing.ppt#384,8,Examples 
(2/8): Precision/recall curves

futher :) what do you mean by PSA and cohort :) after some googling i got 
this

co·hort(khôrt)
n.
1. A group or band of people.
2. A companion or associate.
3. A generational group as defined in demographics, statistics, or market 
research: "The cohort of people aged 30 to 39 . . . were more 
conservative" American Demographics.
4. 
a. One of the 10 divisions of a Roman legion, consisting of 300 to 600 
men.
b. A group of soldiers.

and for PSA i got  Prostate-specific antigen. A substance produced by the 
prostate that may be found in an increased amount in the blood of men who 
have prostate cancer, benign prostatic hyperplasia, or infection or 
inflammation of the prostate.

Now please clarify what you want to model :) please dont take it otherwise 
i am not from biology field. Please clarify :)


Regards,

Gaurav Yadav
+++++++++++
Assistant Manager, CCIL, Mumbai (India)
Mob: +919821286118 Email: emailtogauravyadav@gmail.com
Bhagavad Gita:  Man is made by his Belief, as He believes, so He is



"Rithesh M. Mohan" <rithesh.m@brickworkindia.com> 
07/30/2007 01:30 PM

To
<gyadav@ccilindia.co.in>
cc

Subject
Re: [R] ROC curve in R






Hi Gaurav,
 
Need your help, I’m relatively new to R or even stats, so can you please 
give me step by step details to get ROC curve in R.
 
Requirement.
 
To build ROC curve using only PSA(variable) alone of the original cohort 
against the ROC of the Model of the original cohort.
 


It would be really great if you could help me with this. 


 
Thanks and Regards
Rithesh


============================================================================================
DISCLAIMER AND CONFIDENTIALITY CAUTION:

This message and any attachments with it (the "message") are confidential and intended
solely for the addressees. Unauthorized reading, copying, dissemination, distribution or
disclosure either whole or partial, is prohibited. If you receive this message in error,
please delete it and immediately notify the sender. Communicating through email is not
secure and capable of interception, corruption and delays. Anyone communicating with The
Clearing Corporation of India Limited (CCIL) by email accepts the risks involved and their
consequences. The internet can not guarantee the integrity of this message. CCIL shall
(will) not therefore be liable for the message if modified. The recipient should check this
email and any attachments for the presence of viruses. CCIL accepts no liability for any
damage caused by any virus transmitted by this email.

	[[alternative HTML version deleted]]

