All Forums  Origin Forum  Origin Forum  Absolute or Relative Error in the fitting process?

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by erickzhou[/i] [br]Origin Ver.8 and Service Release (Select Help-->About Origin): Operating System: WINXP During the iteration process of Least square method for surface or curve fitting, absolute or relative error can be selected as the stop criteria. In the chapter of "goodness of fit"(http://www.originlab.com/www/helponline/Origin/en/UserGuide/Goodness_of_Fit.html), it seems that absolute error was selected. But in the chapter of "Illustration of the Least Squares Method", it seems that relative error was choosed, i.e., the first equation to calculate RSS in "http://www.originlab.com/www/helponline/Origin/en/UserGuide/Illustration_of_the_Least_Squares_Method.html". But I don't know that what is the meaning of the parameters "wi", and how to calculate it? Why choose different error in these two chapter, i.e. "goodness of fit" and "Illustration of the Least Squares Method"? Wait for your early reply, thank you! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.