Easy CurveFit 3.0 is a Calculator product from luckhan.com, get 4 Stars SoftSea Rating, Easy CurveFit is a very easy tool to fit curve. Only three steps you should do, and youll get the fitting curve and the needed parameters. The models include linear and nonlinear.
Regressions:
1. Linear Fit, y=a+bx;
2. Quadratic Fit, y=a+bx+cx^2;
3. Compound Fit, y=ab^x;
4. Logatithmic Fit, y=a+b*ln(x);
5. Exponential Fit, y=a*exp(bx);
6. Power Fit, y=a*x^b;
7. Inverse Fit, y=a+b/x;
8. hyperbola Fit, y=ax/(b+x);
9. Geometric Fit, y=ax^(bx);
10. Geometric Fit, y=ax^(b/x);
How to use:
Step1:
Open the data file *.dat or *.txt, the points will be plot in the figure;
such as gaosi.dat:
10 160
16 151
20 114
25 128
31 85
36 91
40 75
45 76
51 66
56 60
60 61
65 60
Step2:
Click one of the buttons that you needed, Then the parameters will show in the memo,
and the fitting curve will appear in the figure.
Step3:
Save the figure and deal with the parameters . The license of this office software is Free Trial Software, the price is $29.90, you can free download and get a free trial before you buy. If you want to get a full or nolimited version of Easy CurveFit, you can buy this office software.