Download Mining the FIRST Astronomical Survey Imola K. Fodor and Chandrika Kamath

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Nonlinear dimensionality reduction wikipedia, lookup

K-nearest neighbors algorithm wikipedia, lookup

Principal component analysis wikipedia, lookup

Multinomial logistic regression wikipedia, lookup

Logistic regression is a special GLM
suitable for modeling binary responses
Logit link and variance functions
g (  i )  log(
1  i
V ( i )  i (1  i )
Likelihood non-linear in parameters, no closed-form
solution: iteratively reweighted least squares to find β̂
Given β̂ ,
exp{ X iβˆ }
ˆ i 
, yˆ i  I{ˆ  p} ,
1  exp{ X iβ}
where I{a} is {0,1} according to {a=False, a=True}, and
the fraction p is generally taken to be 0.5
Sapphire/IKF 19