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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 apkallio[/i] [br]Origin Version (Select Help-->About Origin): 7.5 Operating System:windows XP pro Is there any way in Origin to calculate x AND y weighted linear regression, also taking into account the correlation between the x and y errors? I have known errors for both x and y variables and I know this double-weighting algorithm exists (often called the `York` regression after the author), but I haven`t found a way to do this in Origin. [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.