Origin Version (Select Help-->About Origin): 6.0 Operating System: Windows XP
I used to use Origin 7.0. In fitting a Sigmoidal plot, I was able to use the functions FitX and FitY to chose different values for IC50 (center). However, recently I was downgraded to Origin 6.0 and I can not find a similar function in this version. Was that added for the new version or is there someplace in version 6.0 where I can perform the same task? Thank you for your help.
The Find X/FindY functinality was added in 7.0 using Origin C code and so that cannot run as is in 6.0
If you are interested in just finding Y for given X, you can do that as soon as you finish the fitting process, by opening the script window and typing fit(some_x_value)= and you will get the y value for your some_x_value based on the fit.
As for finding X from a given Y, that needs an iterative algorithm that tries different x values till it hits the specified y value. That could be coded using LabTalk script.
FitX and FitY in Sigmoid plots
Posted - 06/06/2006 : 2:33:32 PM
