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I didn't have time to read all of it, but half way through. So far it has bee a pretty good write up, however, just one question. Can the author or anyone expl
by eam 8y ago
I didn't have time to read all of it, but half way through. So far it has bee a pretty good write up, however, just one question.
Can the author or anyone explain how were the amount for values shifted chosen? I.e. Weight (minus 135) and Height (minus 66). Why was -135 and -66 chosen? An explanation would be helpful. Thanks!
- jventura 8y agoI think they were chosen such that the weight and height values become negative for Females and positive for Males.
- xeRTRex 8y agoI haven't read the article thoroughly but I suspect part of the data preprocessing step included centering and standardizing. Those must be the mean weight and height values.
- LodeOfCode 8y ago"I arbitrarily chose the shift amounts (135 and 66) to make the numbers look nice. Normally, you’d shift by the mean."
- eam 8y agoI am pretty sure that note wasn't written there before. The author must have updated the article after I posted this question. Though "nice" is still somewhat vague to me. Nice in what way? Smaller numbers are nicer? Negative and positives make it nice? The second part of the answer is more useful information, "Normally, you’d shift by the mean."
- emgee_1 8y agoI think this a form of normalizing a normal distribution into a standard normal distribution ( a normal distribution has two parameters \mu and \sigma which in standard form gives respectively 0 and 1. Any normal distribution is a special case of the standard normal distribution N(0,1)