Kamisan, Nur Arina Bazilah and Lee, Muhammad Hisyam and Hussin, Abdul Ghapor and Zubairi, Yong Zulina (2020) Imputation techniques for incomplete load data based on seasonality and orientation of the missing values. Sains Malaysiana, 49 (5). pp. 11651174. ISSN 01266039

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Official URL: http://dx.doi.org/10.17576/jsm2020490522
Abstract
In load data, the missing problem always occurs in a set of data. Since it has a seasonal pattern according to days, most of the time, the load usage for the next day is predictable. For this reason, a new model has been developed based on these characteristics. Data containing missing values being divided to its seasonality pattern and for each subdivision, the values from mean, the mean with standard deviation and third quartile are calculated before being rearrange to form a new set of values that will replace the missing values. These three values will be used as imputations for the missing values. To examine the effects of the orientation of the missing values with the choices of imputation, the missing values from the data are divided into three parts: at the front, in the middle and at the end of the data with 5%, 15%, and 25% of missing values. The results from root mean square error and mean absolute error show that the proposed techniques, particularly the mean and the third quartile value, are superior to the other complex methods when dealing with the missing values. The mean imputation is ample when the missing values is presence at the front and in the middle of the data while the third quartile value is superior when the missing values is at the end of the data.
Item Type:  Article 

Uncontrolled Keywords:  missing values, multiple imputation, seasonal load data, seasonality 
Subjects:  Q Science > QA Mathematics 
Divisions:  Science 
ID Code:  90583 
Deposited By:  Yanti Mohd Shah 
Deposited On:  30 Apr 2021 14:55 
Last Modified:  30 Apr 2021 14:55 
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