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
|