Curve fitting a) define intersect b) fit without pre-defined fittype
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Hey guys
I have some data (let's say X and Y) and I think it fits probably best to a 'power1' fittype. I have used the curve fitting toolbox as well as fitted programmatically of which I prefer the latter (because I have many datasets and I don't particularly like clicking buttons).
Two questions:
a) I know my model has to go through (0,0) and through (1,1). How can I force it?
b) Even though I think it'll be something like y= c*A^z, I would like something like "free fitting" where just the bulk of data is taken into account and fitted. I would like to avoid giving a fittype. Is this possible?
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Jacob Mevorach
am 12 Mai 2017
If I was going to do this I would try a variety of fits for each I thought might be good and I'd calculate the r^2 value for each and then go with the fit which had the maximum r^2 value.
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