| T O P I C R E V I E W |
| Menten |
Posted - 05/13/2022 : 08:26:23 AM
Hello guys,
I have a degradation over time and need a iteration with 3 unknown parameters.
My formula is t=(c(0) - c(t) - km * (ln (c(t)/c(0)) ) / vmax
The time "t" is my dependent variable and I although know c(0)=3335.
time CSB
0 - 242
0 - 3335
1 - 1977
2 - 2641
3 - 2297
4 - 1965
5 - 1637
6 - 1315
7 - 919
9 - 290
24 - 89
How can I get km, c(t) and vmax with a nonlinear regression ?
Thanks a lot! |
| 2 L A T E S T R E P L I E S (Newest First) |
| Menten |
Posted - 05/16/2022 : 03:08:22 AM
Thank you.
I used the simple fit, but still can't get the right fit.
I tipped in my formula as y=(x0 -x -km * (ln(x/x0))) / vmax and fixed x0.
But the fix didn't work, because of mutual dependency exists between parameters. (Error -203)
|
| YimingChen |
Posted - 05/13/2022 : 09:01:04 AM
You can use the simple fit app. Check the page below, it contains a Youtube link of the tutorial.
https://www.originlab.com/fileExchange/details.aspx?fid=239
James |
