Polynomial Trend Line

ConfusedStudent

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mso-style-link:Footer; mso-ansi-font-size:11.0pt; font-family:"Arial","sans-serif"; mso-ascii-font-family:Arial; mso-hansi-font-family:Arial; mso-fareast-language:EN-US;} span.HeaderChar {mso-style-name:"Header Char"; mso-style-unhide:no; mso-style-locked:yes; mso-style-link:Header; mso-ansi-font-size:11.0pt; font-family:"Arial","sans-serif"; mso-ascii-font-family:Arial; mso-hansi-font-family:Arial; mso-fareast-language:EN-US;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page Section1 {size:595.3pt 841.9pt; margin:72.0pt 76.55pt 72.0pt 89.85pt; mso-header-margin:35.45pt; mso-footer-margin:38.15pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="2049"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> Hi this is my first post although I have been using your excellent forum for a number of months.

I am currently building a large number of regression models and am trying to calculate the quality of the correlation (r2). For checking linear trends I have used the "Pearson" function, my question is, is there an equivalent to calculate the regression coefficient for polynomial trends. I am loathed to use xy scatter charts to calculate this as I would have well over 1800 charts to make.


Many thanks in advance
 

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pgc01

MrExcel MVP
Joined
Apr 25, 2006
Messages
19,778
Hi
Welcome to the board

You can use the Linest() function to get the stats on a regression. Check the help. The R2 is the first value in the third row.

For example, to get the R2 from a 3rd degree polynomial trend, try:

=INDEX(LINEST(YValues,XValues^{1,2,3},TRUE,TRUE),3,1)
 

montecarlo2012

Active Member
Joined
Jan 26, 2011
Messages
498
Office Version
2010
Platform
Windows
in the videos 620-621- and 622 mrexcel is so clear because he shows x values like A1:A5, also shows where is Y's values and here my question is what is 1.2.3 and what or where is 3,1. sorry I don't understand, maybe if I see a spreadsheet example, would be so good. can you. please. the linear and average mrexcel explained already so I am missing the others.
 

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