Eis Fitting Free Software
I can suggest EIS spectrum analyser to probe the circuit model and its parameters. 1 Recommendation. Bayero University, Kano. You can use Zsimpwin. The trial software is online. You can fit and see the results of fitting graphically. But if you want to know.
Copyright (c) 2005, Jean-Luc Dellis All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:.
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Bonjour Jacopo, I just have received today the notification of your coments. To answer your first coment, I think it could come from the starting values which must close the best ones when using CPE. Another hint is to try the 'fitNP' string (fit Not Proportionnal).
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I mean a fit could appear badly completed when estimated by eyes on the Z spectrum when it is good when checking the sum (error(i)/Z(i)) given by the output parameter fval. About your second and interressing coment, I would like to get the data and the modified code. In order to check by myself. First of all, thanks for this program, it's gonna really help me. Second: I think that I managed to improve your function so now p and s can work with any number of parameters (maybe not 0, but a check is easy to implement); Third I have a question for you: I tried to fit a complex circuit: s(R1,s(p(E2,R1),p(E2,R1))) with some data, but I'he got a fit that was worste then the input parameters (obtained via EIS software analyzer and entered in your program with 3 significant digit). Any idea why?
Curve Fitting Free Software
1/ I tried your string and there was no error. I think the limit in the amount of elements is higher.
So there is no problem to simulate data. 2/ Fitting experimental data with long strings will be an other task and you would beware of overparametrization (too many elements) leading to some parameter to have nonsensed values.
Tucows Free Software
Freeware
3/ I tried your string on some data and get the minimizer failed at the first try. As said in the help, I retried with the returned 'pbest' as initial parameters and get the convergence. To end, I prompt you to use the 'ZfitGUI' function which eases the data weigthing. Best regards.