All Forums  Origin中文论坛  Origin 中文论坛 (Chinese Origin Forum)  如何Find X from Y(对于非线性拟合）？

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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 dylee[/i] [br]Origin Ver.pro8.6 and Service Release (Select Help-->About Origin): Operating System:win8 Origin大侠们好， 我用多项式拟合（polynomial fit)得到拟合方程，并用Find X from Y求解。发现Y值只有在介于拟合时最大和最小Y值这区间的才有效，不在该范围的Y值无法求X，需要手动求解，而线性拟合不存在这个问题。不知有没有办法解决或如何用ORIGIN解方程。谢谢。 [/quote]   Check here to include your profile signature.