I previously installed minitab software. Tried to use it on non-linear regression but having trouble to find good starting values during the curve fitting process.
(primary models; Gompertz, Logistic, Weibull, Baranyi)
https://www.sartorius.com/en/products/process-analytical-technology/data-analytics-software/doe-software
Have you tried Food Spoilage & Safety Predictor or ComBase? http://fssp.food.dtu.dk/
https://www.combase.cc/index.php/en/
Hi,
There are several Shiny App based curve fitting softwares that you can use, but the best one woudl depend on your usage.
https://microrisklab.shinyapps.io/english/ - is a great app with most models incorporated into it
https://foodmicrowur.shinyapps.io/biogrowth/ - another great software that has most of the models incorporated in it and allows simulation based predictions
IPMP Global Fit https://www.ars.usda.gov/northeast-area/wyndmoor-pa/eastern-regional-research-center/docs/ipmp-global-fit/- allows one step fitting of both primary and secondary models. But is limited compared to the previous two suggestions.
https://ubarron.shinyapps.io/CardinalFit/ - can be used to only it cardinal parameter model
Depending on your usage you can use the DMFit software,
https://www.combase.cc/index.php/en/ or FSSP http://fssp.food.dtu.dk/
I would recommend the first two. You will still have to guess the starting values in certain cases, but it is much easy to play around. For optimal results you can take the starting values obtained from these softwares and try fitting it with the nls package in R, curve fitting tool on MATLAB or minitab to see how they compare.
Hope this helps.
You could try this easy software:
www.lerenisplezant.be/fitting.htm
Not all your model functions are included yet, but I can add them.
I included the logistic, Gompertz, and another transition function in my software. If you want, I can implement more models.
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