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Procedia Computer Science
Article . 2017 . Peer-reviewed
License: CC BY NC ND
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Procedia Computer Science
Article
License: CC BY NC ND
Data sources: UnpayWall
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Portsmouth Research Portal
Contribution for newspaper or weekly magazine . 2017
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Column-wise Guided Data Imputation

Authors: Alessio Petrozziello; Ivan Jordanov;

Column-wise Guided Data Imputation

Abstract

Abstract This paper investigates data imputation techniques for pre-processing of dataset with missing values. The current literature is mainly focused on the overall accuracy, evaluated estimating the missing values on the dataset at hand, however the predictions can be suboptimal when considering the model performance for each feature. To address this problem, a Column-wise Guided Data Imputation method (cGDI) is proposed. Its main novelty resides in the selection of the most suitable model from a multitude of imputation techniques for each individual feature, through a learning process on the known data. To assess the performance of the proposed technique, empirical experiments have been conducted on 13 publicly available datasets. The results show that cGDI outperforms two baselines and has always comparable or greater estimation accuracy over four state-of-the-art methods, widely applied to solve the problem at hand. Furthermore, cGDI has a straightforward implementation and any other known imputation technique can be easily added.

Country
United Kingdom
Related Organizations
Keywords

missing data, data imputation, multitude of imputation models

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    selected citations
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    popularity
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    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Top 10%
Top 10%
Average
Green
gold