I have the following function for which I need to find the root of a:
f <- function(R,a,c,q) sum((1 - (1-R)^a)^(1/a)) - c * q
To give context for the problem, this is a psychometric issue where R is
a vector denoting the percentage of students scoring correct on test
item i in class j, c is the p
n...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Doran, Harold
Sent: Monday, March 16, 2009 10:34 AM
To: r-help@r-project.org
Subject: [R] Uniroot and Newton-Raphson Anomaly
I have the following function for which I need to find the root of a:
f <- function(R,a,c,q) sum((1 - (1-R)^
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