نتایج جستجو برای: regression tree

تعداد نتایج: 479803  

2008
Wei-Yin Loh

A classification or regression tree is a prediction model that can be represented as a decision tree. This article discusses the C4.5, CART, CRUISE, GUIDE, and QUEST methods in terms of their algorithms, features, properties, and performance.

ژورنال: طلوع بهداشت یزد 2018

Introduction: Early detection of osteoporosis is a key to preventing of it; but recognition, without the use of appropriate diagnostic methods, due to the complexity of risk factors and gradual bone loss process, is problem. The purpose of this study is to develop and efficiency evaluation a predictive model of osteoporosis using decision tree technique as a diagnostic method based on available...

2002
Alin Dobra

Decision trees, either classification or regression trees, are especially attractive type of models for three main reasons. First, they have an intuitive representation, the resulting model is easy to understand and assimilate by humans [BFOS84]. Second, the decision trees are nonparametric models, no intervention being required from the user, and thus they are very suited for exploratory knowl...

Journal: :caspian journal of environmental sciences 2013
r. naghdi m. nikooy m. ershadifar

economic and environmental logging is important for sustainable wood production in the caspian forests, north of iran. predetermination of the skid trail network and directional felling is a usual recommended method to reduce logging impact. the aim of this study was evaluation of directional felling and finding factors effective on felling error. totally 135 trees were selected randomly for di...

Journal: :iranian red crescent medical journal 0
farzad ebrahimzadeh instructor of biostatistics, department of public health, faculty of health and nutrition, lorestan university of medical sciences, khorramabad, ir iran; department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran ali azarbar department of statistics, faculty of sciences, amirkabir university of technology, tehran, ir iran mohammad almasian instructor of english language teaching, department of english language, faculty of medicine, lorestan university of medical sciences, khorramabad, ir iran katayoun bakhteyar instructor of midwifery , department of public health, faculty of health and nutrition, lorestan university of medical sciences, khorramabad, ir iran nasim vahabi department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran; department of biostatistics, faculty of medicine, tarbiat modarres university, tehran, ir iran. tel: +98-9122139224, fax: +98-2188006544

results overall, the prevalence of unwanted pregnancies was 32.3%. the performance of the models based on the area under the roc curve as the indicator was as follows: artificial neural networks (0.741), decision tree (0.731), and logistic regression (0.712). the highest sensitivity level belonged to the decision tree (73.5%), and the highest specificity level belonged to the artificial neural ...

آقا مولایی, هاله, برومند, فرزانه, زایری, فرید, سید آقا, سید حسین, یاوری, پروین,

Background and Objectives: Breast cancer is one of the most common malignancies in women which accounts for the highest number of deaths after lung cancer. The aim of the current study was to compare the logistic regression and classification tree models in determining the risk factors and prediction of breast cancer. Methods: We used from the data of a case-control study conducted on 303 pa...

Journal: :journal of biostatistics and epidemiology 0
morteza rostami department of biostatistics and epidemiology, school of public health, kerman university of medical sciences, kerman, iran behshid garrusi department of community medicine, neuroscience research center, afzallipour medical school, kerman university of medical sciences, kerman, iran mohamad reza baneshi modeling in health research center, institute for futures studies in health, kerman university of medical sciences, kerman, iran

background & aim: in many medical studies, one data set is used to construct the model, and to test its performance. this approach is prone to over optimization, and leads to statistics with low chance of external validity. data splitting can be used to create training and test sets but the cost is reduction in power. the aim of this study was to demonstrate the ability of bootstrap aggregating...

Journal: :IEEE Transactions on Pattern Analysis and Machine Intelligence 2016

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