Do unbalanced data have a negative effect on LDA?
نویسندگان
چکیده
منابع مشابه
Do unbalanced data have a negative effect on LDA?
For two-class discrimination, Ref. [1] claimed that, when covariance matrices of the two classes were unequal, a (class) unbalanced dataset had a negative effect on the performance of linear discriminant analysis (LDA). Through re-balancing 10 realworld datasets, Ref. [1] provided empirical evidence to support the claim using AUC (Area Under the receiver operating characteristic Curve) as the p...
متن کاملDo bronchodilators have an effect on bronchiolitis?
Over the past 12 years there have been 12 randomised control trials, involving 843 infants, evaluating the effect of salbutamol or albuterol on bronchiolitis. Of these, nine (75%) showed that bronchodilators had no effect. In three studies a small transient improvement in the acute clinical score was seen. Ipratropium bromide had no significant effect. There have been five recent randomised tri...
متن کاملDo Serum Vitamin D Levels Have Any Effect on Intrauterine Insemination Success?
Objective Recent studies have shown that vitamin D has an essential role in the reproductive system. In this study, we aimed to investigate the effect of vitamin D levels in patients undergoing ovulation induction (OI), and subsequent intrauterine insemination (IUI) procedure. MaterialsAndMethods One hundred and four infertile and one hundred and three fertile women were recruited in this cross...
متن کاملObesity can have a negative effect on sperm quality
Health[1] Health[1]Men's health [2]Norway [3]Forskning.no [4] There is a link between obesity and poor sperm quality. New research shows that fatty acids such as Omega3 may be an important explanation. Considering the fact that more and more people struggle with overweight and obesity, both in Norway and internationally, there is cause for concern, according to the researcher behind the study J...
متن کاملEffect of Relocation and Rotation on Radial Efficiency Scores for a Partially Negative Data Problem
Negative data handling has gained a remarkable importance in the literature of Data Envelopment Analysis (DEA) to address many real life problems. Various erstwhile applications, in this arena, referred relocation of the origin to a superior (RDM) or to an inferior (Translated Input Oriented BCC) neighboring point. In this paper, the conditions for Rotation Invariance of various Data Envelop...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Pattern Recognition
سال: 2008
ISSN: 0031-3203
DOI: 10.1016/j.patcog.2007.11.008