Hello, Below is my script for finding curve fitting parameters R1,R2,R3,R4,C1,C2,C3,C4. How do I verify whether my extracted parameters are correct or not? The script is attached below with the file name thetajc. Thanks, Ram Attachments:

Hey Thanks Chris! You're a rockstar! This works pretty well and the numbers seem realistic!! You made my day!

The outter List layer of your data was giving FindFit some heartburn. I had to remove that with First. The result of FindFit is replacement rules of the form {R1 -> val1, R2 -> val2, R3 -> val3, ...}. These rules will directly replace the matching paramaters in your model formula md1. This result I call solution numbe one, sol1. To visualize the performance of the solution, Show the data and the Plot of the fitted curve together. sol1 = mdl /. FindFit[First@datav, mdl, RC, var] Show[ListPlot[datav, PlotRange -> All], Plot[sol1, {t, 0, 2}, PlotStyle -> Red]]

Hey Chris, I had one last question. Is there a way I can restrict the range of the fitting variables to a predetermined range? e.g. let's say I want to limit the range of following variables R1 = {0.0001,1} R2 = {0.1,5} R3={0.001,1} R4={0.1,100} C1={0.00001,0.00000001} C2={0.0001,0.1} C3={0.01,10} C4={0.001,10} Is it possible to restrict the variables in these ranges. I'm looking at the help files to figure this out!

Verifying extracted curve fitting parameters.