How to plot a fitted curve?
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Hello,
I would like to fit a curve with the following function: y=a-b*c^x
I used this expression with matlab: ft=fittype('a-b*c^x') However,I have a problem when I plot the fit.
I get this message:
Error using plot Conversion to double from fittype is not possible.
Error in project8 (line 149) plot(ft,y2,Av)
回答（1 个）
Wayne King
2013-12-18
编辑：Wayne King
2013-12-18
Did you actually call fit() after you definted your fit type?
a = 2;
b = 3;
x = (0:100)';
y = 2-3*x;
ft=fittype('a+b*x')
f = fit(x,y,ft);
plot(f)
hold on;
plot(x,y)
2 个评论
afrya
2013-12-18
Wayne King
2013-12-18
I was just showing you an example, not trying to do exactly what you are trying to do. I think I answered your question then, the problem is you have to use fit() to obtain the actual fit.
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2013-12-18
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