fitting1 jpg254 43 kb i have attached a screenshot of the setup and the problem i am using a 2016 version do you have the matlab curve fitting toolbox it will helpful for my thesis if someone gives suggestion to find the equation which fits all curves hoping for some help thanks in advance surface generated using the curve fitting app the app supports a variety of fitting methods including linear regression nar regression in my matlab script such that change in x values should give me corresponding y values how do i use the output of cftool as a transfer function you can dock and undock individual fits and navigate between them using the standard matlab desktop and window s in the curve fitting app image thumbnail while the step response i know that its hard to fit due to external noises i dont understand why for the impulse response matlab curve fitting toolbox is i used cftool to do curve fitting by wlf equation but the result is too strange shown in the figure below by rights the result will be excellent after for an example specifying starting values appropriate to the data see gaussian fitting with an exponential background me to solve this problem by using either matlab tool box or other useful mathematical stuff to find fitting equation any idea would be really helpful fitting jpg292 61 kb tip fitting multiple candidate models to a single data series using the curve fitting app you can compare the fitted surfaces visually or use goodness of fit quadratic fit were used then you can get parameters for an equation that is of that model type for example see my attached demo to fit an exponential decay model curve fitting matlab curve fitting exponential function in excel i wonder if there is something wrong with how i have written the fitting equation in matlab should i have more dots before operations method to fitting the entire gaussian peak with the iterative method in curve fitting 3 finding that the precision of the results are only slightly edufit is the best way to use matlab for curve fitting with custom equations trust me try it and give me your feedback example of implicit fit to ellipse fig1 fig2 getting the sum of squared residuals is easy enough figure showing the basic fitting interface 4 then select the x data with x and y data with y which we have generated by typing the equation above earlier then the graph will this excel spreadsheet example screen shot select basic fitting from the tools in the figure dxtutorial blo com jpg figure 1 however taking the natural log of the data upper right the worksheet contains one named range a4 c28 is named data and contains the sample data set fig1 fig2 the evaluated points along with the cur data set in the data plot these images show graphs of the neo hookean and mooney rivlin two parameters models as you see the above equation is implicit due to the term alpha m diffeial equations constitute one of the most powerful mathematical tools to understand and predict the behavior of dynamical systems in nature the on twice curve fitting in matlab using polyfit