All Forums  Origin中文论坛  Origin 中文论坛 (Chinese Origin Forum)  FAQ:如何拟合函数Y=aX1+bX2？

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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 yuki_wu[/i] [br]Q： 如何拟合函数形如Y=aX1+bX2+……？ A： 1.如果函数是非线性函数，则可执行： i.选择菜单栏中的Tools: Fitting Function Organizer打开Fitting Function Organizer窗口，定义新公式 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot20160516172959.png[/img] ii.激活数据列（Y），选择菜单栏：Analysis: Fitting: Non-linear Curve Fit iii.选项卡Settings: Function Selection，选择自定义的拟合函数 iv.Data Selection，选择数据范围 v.选项卡Parameters Tab：定义拟合初值 vi.点击Fit后即可完成拟合 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/faq9-1.jpg[/img] 详细操作可参考教程：http://www.originlab.com/doc/Tutorials/Fitting-MultiIndepVar 2.如果函数是线性函数，则可执行： i.选择菜单栏Analysis: Fitting: Multiple Linear Regression ii.在Multiple Linear Regression窗口中选择拟合的数据范围及拟合选项，点击OK后即可完成拟合。 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot20160516173655.png[/img] 详细的各拟合选项的含义可参考：http://www.originlab.com/doc/Origin-Help/Multi-Regression-Dialog [/quote]   Check here to include your profile signature.