who can help me write matlab codes for curve fitting?

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Ming on 12 Aug 2014
I want to fit these 25 curves.who can write codes for me? my curve fitting function is f(x)=a+b/(1+(d*x)^c)

Answers (2)

Salaheddin Hosseinzadeh
Salaheddin Hosseinzadeh on 12 Aug 2014
Hi Ming,
Try to read your xlsx data using this command "xlsread"
type 'doc xlsread' in matlab command line to see its details.
Then type 'cftool' so that matlab curve fitting toolbar opens you can chose your fit, and when you're satisfied you can go to 'File > Generate Code' and save it as an .m file.
Then take a look inside the created m file and i'm sure you'll learn how to do it without curve fitting interface ;)
Good Luck!
Salaheddin Hosseinzadeh
Salaheddin Hosseinzadeh on 13 Aug 2014
Could you successfully read the xls file and create 25 set of data?

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Pratik Bajaria
Pratik Bajaria on 13 Aug 2014
Hello, Please go though the 'fit' and 'polyfit' function help in matlab. These might address your query. http://www.mathworks.in/help/curvefit/fit.html and http://www.mathworks.in/help/matlab/ref/polyfit.html and the corresponding related functions too.
Please let me know in case of any further queries.
Regards, Pratik

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