<p>I asked <a href="https://stats.stackexchange.com/questions/411327/recreating-figure-from-elements-of-statistical-learning">this question</a> earlier today but was quickly put on hold with a generic comment. I can only assume the question is on hold as it has been interpreted as being a coding question. It is clear from the question, however, that I am trying to understand a statistical concept from a textbook. In particular, I am not clear on what the authors mean exactly by the formula on the Y-axis (including code was just a reference explaining my current interpretation and could easily be ignored) and was looking for some guidance on how to interpret it. </p>

<p>The alternative is stack overflow, but my code does exactly what I want it to do, my question involves figuring out what I want it to do statistically. Reading from the <a href="https://stats.stackexchange.com/help/on-topic">help center</a> seems to indicate this is the correct place. Maybe I am missing something but is this not a reasonable question to be asking on this site? </p>
