August 2019
Beginner to intermediate
232 pages
3h 50m
Chinese
Content preview from Web容量规划之美
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# Fityk script. Fityk version: 0.8.2
@0 < '/home/jallspaw/storage-consumption.xy'
guess Quadratic
fit
info formula in @0
quit
这个脚本导入我们的
x-y
坐标数据文件，设置一个二阶多项式方程式（二次方程），
利用它拟合数据，然后返回信息，例如使用的公式。运行该脚本后会得到下面结果：
$cfityk ./fit-storage.fit
1> # Fityk script. Fityk version: 0.8.2
2> @0 < '/home/jallspaw/storage-consumption.xy'
15 points. No explicit std. dev. Set as sqrt(y)
3> guess Quadratic
New function %_1 was created.
4> fit
Initial values: lambda=0.001 WSSR=464.564
#1: WSSR=0.90162 lambda=0.0001 d(WSSR)=-463.663 (99.8059%)
#2: WSSR=0.736787 lambda=1e-05 d(WSSR)=-0.164833 (18.2818%)
#3: WSSR=0.736763 lambda=1e-06 d(WSSR)=-2.45151e-05 (0.00332729%)
#4: WSSR=0.736763 lambda=1e-07 d(WSSR)=-3.84524e-11 (5.21909e-09%)
Fit converged.
Better fit found (WSSR = 0.736763, ...
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