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   DIR Return to: Questions for R / RStudio (Fall 2023)
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       #Post#: 140--------------------------------------------------
       Question for HW8 and question 1 last part
       By: YuyangWu Date: October 31, 2023, 7:21 pm
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       According to the plot result, we may guess when k equal to
       which number will let the mse be small. However, is there any
       more useful way to determine ?
       #Post#: 142--------------------------------------------------
       Re: Question for HW8 and question 1 last part
       By: Taeho Kim Date: October 31, 2023, 7:31 pm
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       We need to choose k that provides the minimum MSE.
       That is our optimal level k.
       Let say My.MSE is the vector of MSEs for different k values.
       Then, which.min(My.MSE) will give you the index for the minimum
       MSE.
       But, I still think the graph is good enough to find out the
       optimal k.
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