| T O P I C R E V I E W |
| unudurupati |
Posted - 12/08/2019 : 8:54:17 PM
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2019 (64-bit)
9.6.0.172 (Academic)
Operating System:Windows 8, 64 bit
The link to the help page is : https://www.originlab.com/doc/Origin-Help/Logistic-FitFunc
I understand that the n value is for the Hill Coefficient and x0 is the IC50 or EC50, basically the point where the response is 50% of the maximum. What I don't understand is, what is this x1 where the tangent has been drawn? While I can see the expression for it, I don't get by what it means?
UmaN |
| 1 L A T E S T R E P L I E S (Newest First) |
| Shirley_GZ |
Posted - 12/09/2019 : 03:52:16 AM
Hi UmaN,
"x1" is the X value of the point, the second derivative of Y of which is zero(y''=0). At this point, the slope of the tangent line has the biggest value.
Thanks,
Shirley
OriginLab
Originlab Technical Service Team |
|
|
