Data preparation was conducted using SAS Version 8. Descriptive statistics and the full analysis were conducted using STATA Version 8.
The analysis and the necessary data preparation were conducted using R, a language and environment for statistical computing, version 3.3.2 (R Core Team 2016).
KC was responsible for data preparation and conducted the statistical analysis.
PL was the principal investigator for the study (conception and design of the study, literature review, protocol preparation, conducting the study, data collection, data analysis, interpretation of the results, and manuscript preparation and revision).
In the next steps, data preparation for different analyses conducted on our sample is explained; In geography a river bank is defined as the land beside the body of a river in which its slope can differ from vertical to horizontal (Leopold et al. 1964).
With exception of the plots, all data preparation and analyses were conducted using SAS version 9.2 for Windows (SAS Institute Inc ,Cary, NC).
When a data preparation step has been conducted on the training data only, the test data must be prepared equivalently: to not do so might render the test data nonsensical with regard to or even incompatible with the prediction rule derived on the training data.
These processes include: missing data treatment outlier detection variable redundancy detection variable transformation (recodes, creation of indicators, etc) The data preparation process must be conducted in close conjunction with the expert in order not to make false assumptions that can bias final results [ 30].
Some preparation tasks for exploring effective optimization method in power distribution systems are conducted, including problem definition, procedure clarification and data preparation.
