Is their any research article published on Machine Learning, that explained which encoding method to be use transform categorical data to numeric for each scenario? when to use each encoding method?
Dear Hiran Wijesinghe ,
Look the link please.
https://machinelearning-blog.com/2017/12/27/266/
https://www.analyticsvidhya.com/blog/2015/11/easy-methods-deal-categorical-variables-predictive-modeling/
Regards,
Shafagat
one hot is typically used.
.
search for "contrast coding" ; for instance :
https://stats.idre.ucla.edu/r/library/r-library-contrast-coding-systems-for-categorical-variables/
http://www.jds-online.com/files/JDS-563.pdf
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