Talk:Multiple regression: Difference between revisions
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imported>Stevegt (→Summary for clarification:: suggest moving rather than deleting existing height/weight examples) |
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⚫ | Many if not most of the examples on this page were apparently translated blindly from a single incorrect example -- the height/weight examples in particular are all single-axis. Regression of a single X axis is not multiple regression -- see References below. Much of the confusion in this discussion, and many of the suggestions for merging with [[Polynomial Fitting]], stem from that error. |
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⚫ | * You want to use multiple regression to create a three-dimensional surface so you can estimate implied volatility given time to maturity and delta of an options contract. For pretty pictures of this, see [https://www.google.com/search?q=+volatility+surface&tbm=isch volatility surface] graphs. In this case, X is a two-dimensional matrix of <code>{time[i], delta[i]}</code>, and Y is a matching list of <code>implied_volatility[i]</code>. |
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== Clarification needed == |
== Clarification needed == |
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This task needs more clarification, like a link to a suitable wikipedia page. —[[User:Dkf|Donal Fellows]] 17:04, 29 June 2009 (UTC) |
This task needs more clarification, like a link to a suitable wikipedia page. —[[User:Dkf|Donal Fellows]] 17:04, 29 June 2009 (UTC) |
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:: Some formula elements in the preamble to the Perl 6 contribution remain invisible to most browsers. Two instance of the Greek letter gamma (γ) and the whole of the formula I = h 0 ∧ h 1 ∧ h 2 which follows the word 'Noting'. The server-side graphic used by Chrome, IE/Edge, Safari etc is not displaying. (Only a minority of browsers (using MathML + local fonts, as in the case of Firefox) are displaying these formula elements) [[User:Hout|Hout]] ([[User talk:Hout|talk]]) 19:42, 28 September 2016 (UTC) |
:: Some formula elements in the preamble to the Perl 6 contribution remain invisible to most browsers. Two instance of the Greek letter gamma (γ) and the whole of the formula I = h 0 ∧ h 1 ∧ h 2 which follows the word 'Noting'. The server-side graphic used by Chrome, IE/Edge, Safari etc is not displaying. (Only a minority of browsers (using MathML + local fonts, as in the case of Firefox) are displaying these formula elements) [[User:Hout|Hout]] ([[User talk:Hout|talk]]) 19:42, 28 September 2016 (UTC) |
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⚫ | Many if not most of the examples on this page were apparently translated blindly from a single incorrect example -- the height/weight examples in particular are all single-axis. Regression of a single X axis is not multiple regression -- see References below. Much of the confusion in this discussion, and many of the suggestions for merging with [[Polynomial Fitting]], stem from that error. |
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⚫ | * You want to use multiple regression to create a three-dimensional surface so you can estimate implied volatility given time to maturity and delta of an options contract. For pretty pictures of this, see [https://www.google.com/search?q=+volatility+surface&tbm=isch volatility surface] graphs. In this case, X is a two-dimensional matrix of <code>{time[i], delta[i]}</code>, and Y is a matching list of <code>implied_volatility[i]</code>. |
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: First, do not top-post, that's just plain rude. I've removed the incorrect markers and reverted the task description. It is very rude to storm in here and unilaterally change a long-standing task description without discussing it ''first''. Remember this is a site for comparing programming languages, and not some kind of "Maths Overflow". If you are going to use terms such as "implied volatility" or "options contract" you need to explain them. If a task needs more precise inputs and expected outputs it should be discussed on the talk page. If this task deserves to be renamed and a new one created that's what you should do, after discussing it and if no-one objects. --[[User:Petelomax|Petelomax]] ([[User talk:Petelomax|talk]]) 12:14, 10 September 2023 (UTC) |