| T O P I C R E V I E W |
| LCG |
Posted - 07/31/2012 : 8:31:09 PM
Hello,
I was trying to fit some data to this equation
I know all the parameters except for k which varies. This equation works fine with my sigmoidal curve that looks like the one below
But I have a set of data that also looks like an "S" shaped curved except it's the opposite way (i.e. the top of the curve is at the lower x values). What changes can I do to still be able to get k for this type of curve? or do I need to try an find another entire equation for this?
Thanks,
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| 1 L A T E S T R E P L I E S (Newest First) |
| berry_wang |
Posted - 08/01/2012 : 02:14:08 AM
Hi~
I think you might try adding a parameter and modifying your fitting function to:
since your data is symmetric with the regular sigmoidal curve about x=x0 which is parallel to y-axis. I am not sure whether this is the right function that you want to fit.
Hope this will be helpful.
Berry
Originlab
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