All Forums  Origin中文论坛  Origin 中文论坛 (Chinese Origin Forum)  FAQ：拟合时如何处理偏离点？

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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：用户进行曲线拟合时，如何处理明显偏离趋势的数据点呢？ A：用户屏蔽（Mask）或者对数据点加权重： 1.若需屏蔽某数据点，可执行： i.单击选择曲线，当曲线被激活后，单击选择偏离趋势的数据点； ii.右键选择[i]Mask[/i]，数据点变为红色即表明数据点被屏蔽； iii.在执行拟合操作时，该屏蔽点即会被忽略。 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot201605171500512.png[/img] 2.若需为数据增加权重，可执行： i.在数据所在的worksheet增加一列，然后键入各数据点对应的权重； ii.对于Linear Fit，可在选项卡[i]Input[/i]的Y Error中选择权重值，然后在选项卡[i]Fit Control[/i]中选择加权方式。 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot20160517150639.png[/img] [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot20160517150658.png[/img] iii.对于Nonlinear Curve Fit，可在选项卡[i]Setting：Data Selection[/i]中Input的y展开项中选择权重值和加权方式 [img]http://www.originlab.com/ftp/forum_and_kbase/Images/Unnamed QQ Screenshot20160517151036.png[/img] 关于加权方式的选择详细可参考：http://www.originlab.com/doc/Origin-Help/FIt-with-Err-Weight [/quote]   Check here to include your profile signature.