نتایج جستجو برای: missing data

تعداد نتایج: 2444874  

2005
Honghai Feng Chen Guoshun Yin Cheng Bingru Yang Yumei Chen

In KDD procedure, to fill in missing data typically requires a very large investment of time and energy often 80% to 90% of a data analysis project is spent in making the data reliable enough so that the results can be trustful. In this paper, we propose a SVM regression based algorithm for filling in missing data, i.e. set the decision attribute (output attribute) as the condition attribute (i...

Journal: :J. Multivariate Analysis 2014
Ursula U. Müller Anton Schick Wolfgang Wefelmeyer

We consider a partially linear regression model with multivariate covariates and with responses that are allowed to be missing at random. This covers the usual settings with fully observed data and the nonparametric regression model as special cases. We first develop a test for additivity of the nonparametric part in the complete data model. The test statistic is based on the difference between...

Journal: :Journal of Geographical Systems 2010
Harry H. Kelejian Ingmar R. Prucha

The purpose of this paper is to suggest estimators for the parameters of spatial models containing a spatially lagged dependent variable, as well as spatially lagged independent variables, and an incomplete data set. The specifications allow for nonstationarity, and the disturbance process of the model is specified non-parametrically. We consider various scenarios concerning the pattern of miss...

2011
N. C. Vinod

The task of classification with incomplete data is a complex phenomena and its performance depends upon the method selected for handling the missing data. Missing data occur in datasets when no data value is stored for an attribute / feature in the dataset. This paper provides a brief overview to the problem of incomplete data handling techniques and discusses the various methods used with clas...

2012
Houssam Salem Pramuditha Suraweera Geoffrey I. Webb Janice R. Boughton

Averaged n-Dependence Estimators (AnDE) is a family of learning algorithms that range from low variance coupled with high bias through to high variance coupled with low bias. The asymptotic error of the lowest bias variant is the Bayes optimal. The AnDE family of algorithms have a training time that is linear with respect to the training examples, learn in a single pass through the data, suppor...

افشاری‌صفوی, علیرضا, رضایی, منصور, کاظم‌زاده قره‌چبق, حسین,

Background and Objectives: Missing data is a big challenge in the research. According to the type of the study and of the variables, different ways have been proposed to work with these data. This study compared five popular imputation approaches in addressing missing data in the questionnaires. Methods: In this study, 500 questionnaires were used for self-medication in diabetic patients. Mi...

Journal: :Japanese Journal of Biometrics 2006

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