不知道模型的情况下 怎么能拟合出因变量S与其他自变量的函数关系呢？

[sinohack]

S=[2.8
20.6
34.9
23.4
29.9
60
76
40
68
140
220
287
140
208
300
453
160
460
311.3
715
1208.1
1227.7
758.8
625.2
620.9
462
561.9
798.2
724.5
853.3
600
642
670
667
590
690.9
670
730
653
793
690
515
540
];
T=[287.8214618
287.9511181
288.0405485
288.4215067
287.9294645
288.3033375
287.6683532
288.1984296
288.4500838
288.4496231
288.1041039
288.2133585
288.2106822
288.2104845
287.7051875
287.9279449
288.1127402
288.5910417
288.2904087
288.1691335
288.660199
288.4074495
288.1623224
288.1260417
288.8944681
288.4833828
288.2326548
288.7148219
289.5210918
289.1665598
288.8309615
289.0785166
289.2752937
289.0375
289.1207738
288.9358056
289.5596301
289.359434
288.7525964
289.3834473
289.1467605
288.7825354
288.7903971
];
W=[1007.110784
862.2195618
925.0801897
1084.062627
940.10603
1051.261201
913.3416107
924.8876229
858.889857
886.292672
969.8720231
943.980209
953.336
1070.015743
930.9532358
938.4132948
843.6465881
939.4678635
868.0372423
920.8398765
1005.603395
889.2575993
909.673918
984.7370582
977.7994493
929.6527002
944.695774
969.5735294
1028.924271
952.9685133
949.7765907
946.851165
1010.201778
883.2969653
848.1364518
933.3677908
920.0783309
888.337217
961.2967811
883.0531878
1048.544006
827.8451143
1025.056365
];
JP=[-4.552702703
-3.541105121
-2.827493261
1.39202509
-3.891577061
0.004244861
-6.64548495
-0.981729055
1.505347594
1.343360071
-2.394607843
-1.221702317
-1.016032064
-0.625111111
-6.44
-4.004233512
-2.00868984
2.515333333
-0.778222222
-1.459435626
3.330687831
1.049656395
-1.376670442
-1.881440948
5.864988558
1.564763231
-1.380121043
3.995344507
10.86280488
7.008262512
3.744081439
6.160976766
8.295906153
5.70196926
6.695095434
4.85998062
10.25620438
9.91560719
3.879177378
7.775242047
5.338405672
1.701089777
1.948651452
];
sd=[73.21363842
72.53354416
72.92048792
73.17256139
72.53620265
73.34318996
72.15659955
72.02368186
71.68476318
71.55540661
72.25973737
71.6430954
72.98666667
72.36297118
72.29654255
73.07158737
71.1213603
72.34574468
70.92751053
72.63409793
73.07760141
72.29110273
71.13664174
72.0713797
72.07228086
70.85870577
71.1702078
71.54971989
71.80714958
70.88186553
71.62321937
71.06752259
71.66226279
71.38294798
68.95249636
68.71774194
69.48877501
68.87711585
68.55515021
69.26888427
69.80128205
68.11313236
70.23950746
];
rz=[1374.150657
1505.119946
1417.5986
1376.785312
1375.855414
1331.520833
1360.042058
1403.305407
1478.622207
1449.500223
1392.750056
1362.236825
1282.281111
1330.304213
1284.292996
1276.678079
1401.265392
1376.211658
1329.920195
1244.217689
1324.596781
1294.667628
1343.03603
1287.451539
1307.026618
1349.592877
1290.214102
1327.8345
1323.569379
1317.491951
1295.650285
1324.96505
1330.131396
1316.108382
1395.977218
1288.016862
1308.959736
1281.707628
1290.096137
1316.647956
1296.184858
1310.866424
1237.371141
];
rzbfl=[279.3051654
319.9564039
292.4167608
285.0774949
290.951132
283.561828
276.8557047
290.843387
300.3223861
295.6570599
288.5174716
279.4787636
271.6451111
287.3166297
280.0851064
275.1585149
307.0393421
294.2477837
288.2877411
271.5880018
270.2991623
269.3625471
289.6958985
282.2241733
273.9878385
281.1126629
271.9402288
258.3858543
268.8106773
265.2348485
262.9506173
259.8292915
255.1412443
281.6062139
289.2343674
271.0874878
259.5688141
275.3374368
271.8032189
242.1879764
226.8814969
230.1366944
213.983871
];
数据如上，不知道模型的情况下 怎么能拟合出因变量S与其他自变量的函数关系呢？