xyz对应一个三维节点，其中，x，y在区间12.2986，32.1627和-0.01501，15.01之间，这些坐标点的投影类似于一个矩形 但不是规整矩形。要做的就是用Matlab将这些离散三维坐标点拟合成平滑曲面，并输出，然后再求拟合曲面与xy平面投影形成的体的体积V以及投影面积S(非曲面表面积)，并求出体积与面积的比值k，最后输出V,S，k以及拟合的曲面图形。十分感谢！

x=[32.1627

31.9205

32.0458

32.1627

30.8352

30.8251

12.2989

14.8273

12.3338

17.0332

18.2188

12.2986

17.6889

17.9419

12.2986

12.7075

13.2105

13.602

12.6978

20.0169

14.6342

16.1137

19.6977

22.6292

20.9642

12.3732

12.9069

14.1518

28.893

24.2897

21.131

24.3706

24.6859

26.135

26.7915

13.4755

26.3406

18.3049

20.3203

20.2631

16.1909

16.675

19.3017

17.525

15.2609

15.1777

28.2581

18.3962

27.1121

19.6119

12.4861

14.3548

28.7731

24.591

24.615

30.3498

26.1956

23.1213

18.1902

13.1324

22.7624

29.3938

21.9788

15.6382

29.7121

20.3151

20.3993

27.667

12.2986

27.4807

14.9162

15.9848

13.0123

24.3901

26.3928

26.5571

16.4075

13.4092

14.3489

24.92

18.6198

26.576

22.2512

12.2986

13.9773

13.7856

28.1532

29.0473

31.0802

12.648

12.3018

32.1626

28.1899

26.0249

20.7724

19.9472

22.4036

23.781

16.5243

15.8744

17.1676

15.3425

18.6083

21.6033

16.6567

27.1909

21.5501

15.1864

25.2516

16.2692

16.429

25.2495

23.5908

27.7379

18.7545

32.1627

18.1306

22.5581

24.922

14.6318

18.9489

16.9661

23.464

20.4596

13.2834

32.1627

29.8362

18.2351

31.2916

];

y=[11.001

13.118

12.7395

11.9981

11.4595

9.63866

14.9312

14.4271

14.9398

13.4558

15.015

14.8304

14.587

15.015

13.5379

14.6055

14.9148

13.5426

13.1109

15.015

3.88499

-0.0121061

-0.0150068

11.1467

-0.0150069

10.7654

8.44332

5.1579

0.884019

2.91457

13.9361

-0.015007

12.1196

-0.015007

11.3829

6.9429

15.015

4.24061

8.82337

-0.0150069

11.7065

6.29494

0.927358

-0.0150068

2.23134

5.03782

-0.0150071

10.1095

-0.015007

5.4052

9.93337

11.3272

2.62877

14.0666

15.015

4.31262

4.62029

15.015

2.23861

10.716

13.1339

8.61825

4.23071

1.23579

6.49088

3.20716

12.5442

1.15321

13.1865

9.53356

3.1408

2.54772

11.8972

7.01214

13.24

0.924501

1.38673

9.81516

9.06885

9.78473

11.9874

2.52665

2.07328

12.2866

7.79283

6.12453

4.6625

10.8639

6.04626

9.17667

11.5207

4.99772

12.8178

8.37929

1.09385

13.8192

8.95438

5.03505

-0.0150067

0.612606

1.06306

3.66722

-0.0150068

6.72668

0.531861

7.22711

15.015

7.8542

1.04339

9.16189

4.04457

-0.015007

0.99784

14.0537

7.72309

7.9232

1.07037

-0.0150069

1.87402

6.46671

2.16082

0.685987

-0.0150069

10.5935

7.44975

9.31692

12.6213

13.8084

12.7399

];

z=[7.567516464

7.326168618

7.26447472

7.695456071

7.610342229

6.970763837

5.399174782

1.455725089

5.383290935

2.530031761

4.30143983

2.866794238

2.255227004

1.017496697

2.103445429

2.690290425

2.077100614

1.99905286

2.091664201

4.940408079

4.285700653

2.958530578

3.427685052

4.851003341

3.500523322

2.966608035

2.745874076

3.98429337

4.931779558

4.657570814

5.145589169

4.120389305

5.762056135

4.171654705

6.130338437

3.031069563

7.815263116

4.009349085

4.099312221

3.338009053

2.616791957

3.622461692

3.42891595

3.361933517

3.295186919

3.902690253

4.442532628

3.447250537

4.544585068

4.222765601

2.673158363

2.404322141

5.098846085

6.519169014

7.113527969

5.658972041

5.093777563

5.865706073

3.767832294

2.706526744

5.290812058

6.30385769

4.58292542

3.110106616

5.995815489

4.34905842

4.120916835

4.625171969

2.705697648

5.945300355

3.628090612

3.551067747

2.404934112

5.022901101

6.507941891

4.406638403

3.337983292

2.77064433

2.923771086

5.334178329

3.212384637

4.766063133

4.283109586

2.604964664

3.044090324

3.387547643

5.383218763

6.597158364

6.317417108

2.641400446

3.424439368

6.022873271

6.709851852

5.515513013

3.844424135

4.244532499

4.589700264

4.884436254

3.129381577

3.040370885

3.192506415

3.783344017

3.400052712

4.505696946

3.26885752

5.588818953

5.798703017

3.232219249

4.342017572

3.157816098

3.85566383

4.037143674

4.158476061

7.153785676

3.850307997

6.737252142

3.22157655

3.642266273

4.260205157

3.385962114

3.987768326

3.184205061

3.747921678

4.127635988

2.881636358

7.017895533

7.731337412

3.353965072

8.704425346

]