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 用LabTalk进行非线性拟合		  New Topic  Reply to Topic
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vickey

14 Posts
Posted - 05/17/2016 :  05:17:34 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
用LabTalk进行非线性拟合
range fitx=1, fity=3; // 设置第三列为拟合曲线输出列
nlbegin iy:=(1,2) func:=gauss nltree:=Fitresults; //设置拟合条件，把拟合参数放到Fitresults树中
Fitresults.xc = 5; // 设置峰中心初始值为 5.
//Fitresults.f_xc = 1; // 固定峰中心值为1.
nlfit; // 开始拟合直至收敛
fity=fit(fitx); // 通过拟合结果生成拟合曲线放到第三列
nlend 1 1; //输出拟合报告并设置结果为自动更新


拟合完成后参数结果都存储在Fitresults树里，你可以运行Fitresults.=;然后可以看到这个树里面所包含的所有结果。
如果想把结果放到某个cell，可以用下面的：
col(4)[1] = Fitresults.xc； //被高斯拟合中心放到第四列第一个单元格。


希望对大家有用！
感兴趣的同学可以去到下面的参考页学习：
http://www.originlab.com/doc/X-Function/ref/nlbegin
Edited by - vickey on 05/17/2016 10:38:52 PM
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