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 如何Find X from Y(对于非线性拟合）？		  New Topic  Reply to Topic
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dylee

USA
7 Posts
Posted - 12/11/2018 :  7:44:24 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
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。

yuki_wu

896 Posts
Posted - 12/12/2018 :  9:46:48 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

1# 请试用我们最新版的 Origin 2019。
http://www.originlab.com/index.aspx?s=12&lm=62

2# 解方程可用以下的App：
https://www.originlab.com/fileExchange/details.aspx?fid=393

Regards,
Yuki

OriginLab
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dylee

USA
7 Posts
Posted - 12/17/2018 :  7:27:03 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Yuki,thanks.
需要update到最新的版本比较麻烦啊。暂时忍一忍。不过很高兴新版本会有这个功能。
anyway, thanks.
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