The Origin Forum
File Exchange
Try Origin for Free
The Origin Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ | Send File to Tech support
 All Forums
 Origin中文论坛
 Origin 中文论坛 (Chinese Origin Forum)
 origin拟合动力学方程

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Anti-Spam Code:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkUpload FileInsert Image Insert CodeInsert QuoteInsert List
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

 
   

T O P I C    R E V I E W
夜寐 Posted - 07/19/2020 : 10:37:56 PM
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2020 (64-bit) SR1
9.7.0.188 (学习版)

Operating System: win10
我想用origin拟合动力学方程,类似于 t=1 -3(1 - X)^2/3 + 2(1-x)这种,然后自定义函数一直失败,甚至不如用excel来的快捷。。
现在需要用复杂的方程了,要用到最小二乘法,t=τ_F X+τ_P (1-3〖(1-X)〗^(2⁄3)+2(1-X))+τ_R (1-(1-X)^(1/3) ),请问要如何拟合?尝试了很久一直失败,谢谢
3   L A T E S T    R E P L I E S    (Newest First)
yuki_wu Posted - 08/02/2020 : 10:32:46 PM
Hi,

建议参考以下教程:
https://www.originlab.com/doc/Tutorials/Multi-Functions-Global-Fitting

Regards, Yuki
OriginLab
夜寐 Posted - 07/27/2020 : 03:17:51 AM
quote:
Originally posted by yuki_wu

Hi,

不清楚你说的失败是指定义函数出现错误还是拟合不收敛?建议参考以下的教程:
https://www.originlab.com/doc/Tutorials/SurfaceFit-with-UserDef-FitFunc

Regards, Yuki
OriginLab



您好,是这样的,我有两条曲线,一个是概率密度,一个是总体分布,这俩的函数是相关的,我想同时拟合他们俩。
y2=100*(1-exp(-(x/l)^m))
y1=100/(l^m)*m*(x^(m-1))*exp(-(x/l)^m)
可是这样总是只有一条拟合的好,另一条很离谱,比如


都这样了R2还0.99呢。。。
yuki_wu Posted - 07/21/2020 : 10:56:13 PM
Hi,

不清楚你说的失败是指定义函数出现错误还是拟合不收敛?建议参考以下的教程:
https://www.originlab.com/doc/Tutorials/SurfaceFit-with-UserDef-FitFunc

Regards, Yuki
OriginLab

The Origin Forum © 2020 Originlab Corporation Go To Top Of Page
Snitz Forums 2000