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发现拉格朗插值的稳定性不好,下面的数据插值后发散。期待雪球用三次样条验证下是否可行(我改了下fortran代码,老是不对)?
共53行数据,要求插值间距为0.1:
0 0.0448691
0.8 0
3.36 -0.141092
5.92 -0.270408
8.48 -0.379768
11.04 -0.462291
13.6 -0.511338
16.16 -0.524469
18.72 -0.509841
21.28 -0.47633
23.84 -0.432552
26.4 -0.387011
28.96 -0.346568
31.52 -0.311683
34.08 -0.281601
36.64 -0.255941
39.2 -0.234728
41.76 -0.218125
44.32 -0.204685
46.88 -0.192656
49.44 -0.180615
52 -0.16741
54.56 -0.152814
57.12 -0.137541
59.68 -0.122244
62.24 -0.107776
64.8 -0.0951893
67.36 -0.0854269
69.92 -0.0777986
72.48 -0.071234
75.04 -0.0648455
77.6 -0.0579076
80.16 -0.0502016
82.72 -0.0420509
85.28 -0.0337848
87.84 -0.0258565
90.4 -0.0188259
92.96 -0.0132322
95.52 -0.00877765
98.08 -0.00491217
100.64 -0.0011118
103.2 0.0032074
105.76 0.00809623
108.32 0.0127307
110.88 0.0166258
113.44 0.019518
116 0.0215117
118.56 0.0226838
121.12 0.0216095
123.68 0.0171785
126.24 0.00933951
128.8 0
129.6 -2.70E-03
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