Please help on curve fitting
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I need to fit my data sets to an equation Y = A + Bx^2 + C D^4. With my limited knowledge, I have tried p=polyfit(x,y,4); which returned with values for coefficients of x and x^3 terms. Would really apprecite any help.
Thank you
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John D'Errico
2018-11-29
Assuming that you mean a model of the form
Y = A + Bx^2 + C x^4
Simple is to download my polyfitn from the file exchange, which can allow you to specify a specific model.
As easy for this very specific case is to use polyfit, on the transformed quadratic model:
Y = A + Bu + C u^2
where you define u as x^2. Get that from:
p=polyfit(x.^2,y,2);
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