ne
Johns Hopkins University
Ph. (410) 502-2619
email: rvarad...@jhmi.edu
- Original Message -
From: "olivier.abz" <0509...@rgu.ac.uk>
Date: Thursday, October 22, 2009 10:24 am
Subject: [R] How to calculate the area under the curve
To: r-help@r-project.org
Hi all,
I w
Subject: [R] How to calculate the area under the curve
Hi all,
I would like to calculate the area under the ROC curve for my predictive
model. I have managed to plot points giving me the ROC curve. However, I
do not know how to get the value of the area under.
Does anybody know of a function that
__
Ravi Varadhan, Ph.D.
Assistant Professor,
Division of Geriatric Medicine and Gerontology
School of Medicine
Johns Hopkins University
Ph. (410) 502-2619
email: rvarad...@jhmi.edu
- Original Message -
From: "olivier.abz" <0509...@rgu.ac.uk>
Da
> -Original Message-
> From: r-help-boun...@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of olivier.abz
> Sent: Thursday, October 22, 2009 7:23 AM
> To: r-help@r-project.org
> Subject: [R] How to calculate the area under the curve
>
>
> Hi
Well, you can use the trapezoidal rule to numerically calculate any area under
the curve. I don't know if a specific exists but you could create one. The
principle is basically to compute the area between two successive points of
your profile with:
AREA=0.5*(Response1 + Response2)/(Time2-Time1)
olivier.abz wrote:
Hi all,
I would like to calculate the area under the ROC curve for my predictive
model. I have managed to plot points giving me the ROC curve. However, I do
not know how to get the value of the area under.
Does anybody know of a function that would give the result I want usi
Hi all,
I would like to calculate the area under the ROC curve for my predictive
model. I have managed to plot points giving me the ROC curve. However, I do
not know how to get the value of the area under.
Does anybody know of a function that would give the result I want using an
array of speci
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