Note on Bayesian Screening of Possibly Rare Features for Predictive Value

نویسنده

  • William H. Press
چکیده

In the situation of interest, we want to classify an object into one of two categories, call them A and B, on the basis of the presence or absence of multiple features, call them F1, F2, . . .. A specific feature F is characterized by the probabilities with which it occurs (denoted +F ) or does not occur (denoted −F ) when the truth is actually A or B, respectively. In other words, we have the ordinary 2× 2 contingency table,

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A New Hybrid Framework for Filter based Feature Selection using Information Gain and Symmetric Uncertainty (TECHNICAL NOTE)

Feature selection is a pre-processing technique used for eliminating the irrelevant and redundant features which results in enhancing the performance of the classifiers. When a dataset contains more irrelevant and redundant features, it fails to increase the accuracy and also reduces the performance of the classifiers. To avoid them, this paper presents a new hybrid feature selection method usi...

متن کامل

A Note on Evolutionary Rate Estimation in Bayesian Evolutionary Analysis: Focus on Pathogens

Bayesian evolutionary analysis provide a statistically sound and flexible framework for estimation of evolutionary parameters. In this method, posterior estimates of evolutionary rate (μ) are derived by combining evolutionary information in the data with researcher’s prior knowledge about the true value of μ. Nucleotide sequence samples of fast evolving pathogens that are taken at d...

متن کامل

Evaluation of Students' Vision Screening Test by School Nurse

ABSTRACT Health screening in student, such as Visual screening test usually carry out by school nurses in many rural schools in Iran. While students are in the growth age, visual acuity may be affected by growth. A Study was carried out to evaluate vision screening test on students in Hamadan, Iran. A sample of 878 pupils examined by a school nurse using E- Chart. According to the test, chil...

متن کامل

Letter to Editor: Positive predictive value of diabetes mellitus risk assessment

Diabetes mellitus (DM) is an important public health challenge [1 ].Different studies predicted that the frequency of diabetic patients will be increased to 642 million throughout the world by 2040 [2]. A notable percentage of diabetic patients are not aware of their disease (approximately 30% in Iran) [3]. Lag in the diagnosis of DM raises the expense of controlling disease and makes the progn...

متن کامل

The first positive: computing positive predictive value at the extremes.

Computing the positive predictive value (PPV) of a wellknown test for a relatively common disease is a straight-forward exercise. However, in the case of a new test for a rare disorder; the extreme numbers involved-the very low prevalence of the disorder and the lack of previous false-positive results--make it difficult to compute the PPV. As new genetic tests become available in the next decad...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005