How to create a contour plot for bsfc using the data for rpm, torque and bsfc on matlab

I need to create a contour plot for the bsfc data of a test engine. The rpm, torque and bsfc data are mentioned below. Please guide me as to how I can create the same on Matlab.

RPM TORQUE (Nm) BSFC (gkWh) 1000 13.4 485.1

1000 2.8 1563.4

1000 12.9 470.4

1000 21.4 368.6

1000 25.8 331.5

1000 36.7 303.6

1000 43.5 216.4

1000 50 333.6

1200 8.6 570.6

1200 16.6 366.4

1200 24.6 329.3

1200 32.1 307.5

1200 37.8 298.4

1200 43.6 305

1200 50.3 336.7

1600 10.9 466

1600 18.2 371.4

1600 25.1 320

1600 33.6 268.5

1600 38.7 296.3

1600 44.2 300.5

1600 51.6 326.6

2000 11.3 467.2

2000 19.5 357.2

2000 27.8 314.3

2000 36 294.3

2000 43.1 278.5

2000 49 282.5

2000 56.4 315.5

2400 12.2 445.9

2400 19.6 345.9

2400 27.5 313.6

2400 35.5 288.8

2400 43.1 273.6

2400 50.1 274.5

2400 56.5 307.4

2800 12.4 445.7

2800 20.4 351.6

2800 26.7 312.7

2800 36.9 288.3

2800 44.9 275.2

2800 51.6 275.2

2800 57.6 311.2

3200 10.8 407.1

3200 19 367.9

3200 27.5 320.4

3200 35.7 294

3200 44.3 279.6

3200 52.7 277.2

3200 59.2 306.3

3601 9.3 564.7

3601 17.6 391.6

3601 25.7 332.4

3601 34 302.5

3601 42.6 287.2

3601 51.3 285.7

3601 58.3 309.1

4001 9.6 552.8

4001 17.9 391.5

4001 26.1 334.3

4001 34.4 306

4001 42.9 303.7

4001 51.4 296.8

4001 58.5 309.4

[huynh duong]

Hi Avinash.

I have a problem the same you. How do you plot bsfc contour of engine. Could you help me. email: [e-mail]

Thanks.

[AMITABH gautam]

I have the same problem, if you found an answer could you please send me the solution? [e-mail]

Thanks

[shreyash chandak]

can any one help me with the same problem? mail me at [e-mail] thanks

[Ewe Jin]

I need help too, please, here is my email: [e-mail]. Thanks

[Busra Arikok]

could you please help me with the same problem? my mail is : [e-mail] Thanks

[Petar Pavic]

https://www.mathworks.com/matlabcentral/answers/6071-how-to-create-a-contour-plot-for-bsfc-using-the-data-for-rpm-torque-and-bsfc-on-matlab#answer_384503

[Barbora Kolpaková]

I have a similar problem,no matter what i try it doesnt work. those are my numbers

1000 147.59895324707 247

1000 147.49836730957 247

1000 147.221221923828 247

1000 145.891250610351 247

1000 143.909286499023 248

1000 140.863586425781 249

1000 135.446151733398 250

1000 118.390319824218 422

1000 92.90771484375 445

1000 59.7416458129882 306

1500 158.051437377929 237

1500 157.951217651367 237

1500 157.566284179687 237

1500 154.905120849609 237

1500 150.820709228515 239

1500 147.491836547851 239

1500 128.411270141601 246

1500 110.416641235351 416

1500 75.2012023925781 458

1500 41.1206932067871 345

2000 164.128860473632 233

2000 163.73567199707 233

2000 162.747695922851 234

2000 157.799865722656 235

2000 152.328796386718 236

2000 145.13377380371 238

2000 121.688110351562 247

2000 86.7719039916992 440

2000 59.8161239624023 494

2000 27.303689956665 425

2500 169.641159057617 233

2500 168.634292602539 233

2500 166.082962036132 234

2500 157.312637329101 236

2500 149.279724121093 238

2500 131.901016235351 244

2500 108.934036254882 255

2500 82.1966552734375 451

2500 44.5346374511718 564

2500 15.0628404617309 637

3000 171.109588623046 235

3000 169.8037109375 236

3000 166.917495727539 236

3000 157.058837890625 239

3000 140.757522583007 244

3000 132.275466918945 247

3000 102.664627075195 262

3000 65.2174987792968 495

3000 32.6878204345703 672

3000 6.95230960845947 1218

3500 167.864456176757 239

3500 167.323410034179 239

3500 165.819580078125 240

3500 157.939697265625 242

3500 145.385452270507 246

3500 123.004837036132 255

3500 80.2925872802734 287

3500 47.0103607177734 579

3500 18.9694728851318 965

3500 1.41844093799591 5520

4000 170.854522705078 243

4000 169.65461730957 244

4000 166.132110595703 245

4000 152.501663208007 249

4000 140.088592529296 254

4000 111.992088317871 267

4000 72.1581344604492 306

4000 39.1304244995117 653

4000 11.1619758605957 1492

4500 173.895324707031 250

4500 171.416137695312 250

4500 166.354934692382 251

4500 146.819595336914 257

4500 122.202232360839 268

4500 96.5167083740234 285

4500 59.9062232971191 337

4500 30.1805992126464 778

4500 6.36304569244384 2498

5000 173.585800170898 257

5000 169.25894165039 257

5000 162.090850830078 258

5000 137.594635009765 266

5000 115.809295654296 277

5000 85.2705841064453 303

5000 49.8894805908203 375

5000 22.8565368652343 963

5500 168.05110168457 264

5500 162.948928833007 264

5500 153.40232849121 267

5500 129.344314575195 276

5500 108.045639038085 289

5500 71.5518951416015 332

5500 36.348388671875 460

5500 15.0586185455322 1363

6000 156.899932861328 272

6000 152.470123291015 273

6000 143.475753784179 276

6000 119.445098876953 288

6000 94.6066207885742 309

6000 62.4612579345703 363

6000 29.239574432373 545

6000 6.88392448425293 2740

6500 145.162063598632 283

6500 140.081802368164 285

6500 130.680343627929 290

6500 108.962089538574 304

6500 83.6306076049804 333

6500 49.9563484191894 417

6500 22.7222499847412 671

7000 135.508895874023 296

7000 131.184112548828 298

7000 123.733245849609 302

7000 96.9293975830078 326

7000 70.2859725952148 368

7000 43.4855995178222 465

7000 15.8871908187866 911

Answer 1

[Petar Pavic]

Here is the .m file :)

[Barbora Kolpaková]

hello i have a similar problem .i tried using this file and just changing my numbers but somehow i always get an error . Anz idea wha i could try? My numbers

1000 147.59895324707 247

1000 147.49836730957 247

1000 147.221221923828 247

1000 145.891250610351 247

1000 143.909286499023 248

1000 140.863586425781 249

1000 135.446151733398 250

1000 118.390319824218 422

1000 92.90771484375 445

1000 59.7416458129882 306

1500 158.051437377929 237

1500 157.951217651367 237

1500 157.566284179687 237

1500 154.905120849609 237

1500 150.820709228515 239

1500 147.491836547851 239

1500 128.411270141601 246

1500 110.416641235351 416

1500 75.2012023925781 458

1500 41.1206932067871 345

2000 164.128860473632 233

2000 163.73567199707 233

2000 162.747695922851 234

2000 157.799865722656 235

2000 152.328796386718 236

2000 145.13377380371 238

2000 121.688110351562 247

2000 86.7719039916992 440

2000 59.8161239624023 494

2000 27.303689956665 425

2500 169.641159057617 233

2500 168.634292602539 233

2500 166.082962036132 234

2500 157.312637329101 236

2500 149.279724121093 238

2500 131.901016235351 244

2500 108.934036254882 255

2500 82.1966552734375 451

2500 44.5346374511718 564

2500 15.0628404617309 637

3000 171.109588623046 235

3000 169.8037109375 236

3000 166.917495727539 236

3000 157.058837890625 239

3000 140.757522583007 244

3000 132.275466918945 247

3000 102.664627075195 262

3000 65.2174987792968 495

3000 32.6878204345703 672

3000 6.95230960845947 1218

3500 167.864456176757 239

3500 167.323410034179 239

3500 165.819580078125 240

3500 157.939697265625 242

3500 145.385452270507 246

3500 123.004837036132 255

3500 80.2925872802734 287

3500 47.0103607177734 579

3500 18.9694728851318 965

3500 1.41844093799591 5520

4000 170.854522705078 243

4000 169.65461730957 244

4000 166.132110595703 245

4000 152.501663208007 249

4000 140.088592529296 254

4000 111.992088317871 267

4000 72.1581344604492 306

4000 39.1304244995117 653

4000 11.1619758605957 1492

4500 173.895324707031 250

4500 171.416137695312 250

4500 166.354934692382 251

4500 146.819595336914 257

4500 122.202232360839 268

4500 96.5167083740234 285

4500 59.9062232971191 337

4500 30.1805992126464 778

4500 6.36304569244384 2498

5000 173.585800170898 257

5000 169.25894165039 257

5000 162.090850830078 258

5000 137.594635009765 266

5000 115.809295654296 277

5000 85.2705841064453 303

5000 49.8894805908203 375

5000 22.8565368652343 963

5500 168.05110168457 264

5500 162.948928833007 264

5500 153.40232849121 267

5500 129.344314575195 276

5500 108.045639038085 289

5500 71.5518951416015 332

5500 36.348388671875 460

5500 15.0586185455322 1363

6000 156.899932861328 272

6000 152.470123291015 273

6000 143.475753784179 276

6000 119.445098876953 288

6000 94.6066207885742 309

6000 62.4612579345703 363

6000 29.239574432373 545

6000 6.88392448425293 2740

6500 145.162063598632 283

6500 140.081802368164 285

6500 130.680343627929 290

6500 108.962089538574 304

6500 83.6306076049804 333

6500 49.9563484191894 417

6500 22.7222499847412 671

7000 135.508895874023 296

7000 131.184112548828 298

7000 123.733245849609 302

7000 96.9293975830078 326

7000 70.2859725952148 368

7000 43.4855995178222 465

7000 15.8871908187866 911

Answer 2

[bym]

doc contour()

*edit*

you need to reshape your data before calling contour. Also the second data row (1000 2.8 1563.4) is an outlier, so I'd delete it. assuming d is your data in matrix form:

rpm = reshape(d(:,1),7,[])% do the same for torque & bsfc, then
contour(rpm,t,bsfc)

[Avinash]

Hey Proecsm

Could you please provide the procedure to create the bsfc. I am having trouble interpreting your answer. I will be grateful if you could help me out.

[bym]

isn't it given in the table you posted?

[bym]

I think I may have mis-interpreted your question. Do you want to fit a function to the data given, then plot a contour?

[Avinash]

Yes, That is what I wish to do. I have the data, but I do not know how to interpret it to plot a contour for the bsfc. I mean if you look at the data - for same rpms at different torque values, I have different bsfc. I have to plot a contour for this bsfc.

[Avinash]

Hey Proecsm, I could plot the contour using the codes which you have provided. However the contours which are being generated are too noisy. Is there any way to smoothen the plot so that I can derive useful information from the plot. I read somewhere about using Gridfit. Can I use it here and if yes how?

Answer 3

[Stephen Jones]

https://www.mathworks.com/matlabcentral/answers/195299-how-do-i-create-a-bsfc-contour-map