Fill between two curves is not working

Hi, I would need to fill up the area between two curves, and I tried to use the function fill as follows:

fill([x fliplr(x)],[curve2 fliplr(curve1)],'r')

However, I get this plot:

Any idea on how to fix it?

The inputs are:

x = [1:167]';

curve1 = [0.673996610286411
         0.673673251337359
         0.673415708189219
         0.673217628041518
         0.673072658093783
         0.672974445545541
         0.672916637596318
         0.672892881445642
         0.672896824293039
         0.672922113338036
          0.67296239578016
         0.673011318818937
         0.673062529653894
         0.673109675484559
         0.673146403510457
         0.673166360931115
         0.673163194946061
         0.673130552754822
         0.673062081556923
         0.672951428551891
         0.672792240939255
         0.672583514699266
         0.672345640935088
         0.672104359530608
         0.671885410369716
         0.671714533336301
         0.671617468314251
         0.671619955187455
         0.671747733839802
         0.672026544155181
          0.67246565118383
         0.673008420641381
         0.673581743409818
         0.674112510371122
         0.674527612407275
         0.674753940400259
         0.674718385232058
         0.674347837784653
         0.673569188940025
         0.672309329580159
         0.670495150587034
         0.668113291382176
         0.665389385545275
         0.662608815195564
         0.660056962452274
         0.658019209434639
         0.656780938261889
         0.656627531053258
         0.657714102816945
         0.659674700117009
         0.662013102406479
         0.664233089138384
         0.665838439765749
         0.666332933741602
         0.665220350518972
         0.662147683851062
         0.657334784691779
         0.651144718295209
         0.643940549915434
          0.63608534480654
         0.627942168222611
          0.61987408541773
         0.612132703790435
         0.604523799317075
         0.596741690118449
          0.58848069431536
         0.579435130028609
         0.569299315378996
         0.557767568487323
         0.544711705519161
         0.530713534819153
         0.516532362776713
         0.502927495781255
         0.490658240222192
         0.480483902488938
         0.473163788970907
         0.469457206057512
         0.469890106166702
         0.474055025830568
         0.481311147609734
         0.491017654064828
         0.502533727756473
         0.515218551245297
         0.528431307091925
         0.541531177856983
         0.553877346101096
          0.56482899438489
         0.573882914265223
         0.581086333283881
         0.586624087978881
         0.590681014888241
         0.593441950549979
         0.595091731502113
         0.595815194282661
         0.595797175429641
         0.595218240981186
         0.594241874975899
         0.593027290952496
         0.591733702449696
         0.590520323006215
         0.589546366160771
         0.588971045452083
         0.588953574418867
         0.589653166599841
         0.591229035533723
         0.593840394759231
         0.597565138943005
         0.602155887263384
         0.607283940026628
         0.612620597538999
         0.617837160106758
         0.622604928036167
         0.626595201633486
         0.629558708460915
         0.631563885104397
         0.632758595405817
         0.633290703207056
         0.633308072349997
         0.632958566676522
         0.632390050028514
         0.631750386247856
         0.631187439176429
         0.630849072656117
         0.630851152682596
         0.631181553866717
         0.631796152973129
         0.632650826766476
         0.633701452011405
         0.634903905472563
         0.636214063914597
         0.637587804102151
         0.638981002799873
         0.640349536772409
         0.641649282784406
          0.64283611760051
         0.643865917985367
         0.644707012443729
          0.64537753644077
         0.645908077181772
         0.646329221872014
         0.646671557716777
         0.646965671921341
         0.647242151690986
         0.647531584230992
         0.647864556746639
         0.648264977818572
          0.64873004152888
         0.649250263335021
          0.64981615869445
          0.65041824306462
         0.651047031902987
         0.651693040667007
         0.652346784814134
         0.652998779801824
         0.653639541087531
          0.65425958412871
         0.654849424382818
         0.655399577307308
         0.655900558359636
         0.656342882997257
         0.656717066677625
         0.657013624858197
         0.657223072996427
          0.65733592654977
         0.657342700975681
         0.657233911731616
         0.657000074275028];
     
curve2 = [0.672772576702148
         0.672366853836992
         0.671866640834829
          0.67127815023829
         0.670607594590004
           0.6698611864326
         0.669045138308709
         0.668165662760959
         0.667228972331981
         0.666241279564404
         0.665208797000857
         0.664137737183971
         0.663034312656375
         0.661904735960698
          0.66075521963957
         0.659591976235622
         0.658421218291481
         0.657249158349779
         0.656082008953144
         0.654925982644206
         0.653794448058048
         0.652729398199563
         0.651779982166097
         0.650995349054996
         0.650424647963607
         0.650117027989274
         0.650121638229345
         0.650487627781166
         0.651264145742082
          0.65250034120944
         0.654245363280585
         0.656495636729907
          0.65903668903996
         0.661601323370342
         0.663922342880652
         0.665732550730486
         0.666764750079442
         0.666751744087119
         0.665520664779371
         0.663275959647084
           0.6603164050474
         0.656940777337462
         0.653447852874412
         0.650136408015393
         0.647305219117548
         0.645253062538019
         0.644278714633949
          0.64468095176248
         0.646758550280755
         0.650547128468748
         0.655029672297751
         0.658926009661891
          0.66095596845529
         0.659839376572075
         0.654296061906368
         0.643045852352296
         0.624808575803982
         0.598810171196179
         0.566301021626156
          0.52903762123181
         0.488776464151038
         0.447274044521737
         0.406286856481804
         0.367571394169136
          0.33288415172163
         0.303981623277182
         0.282190940683338
         0.267121786626229
         0.257954481501636
         0.253869345705336
         0.254046699633111
          0.25766686368074
         0.263910158244002
         0.271983520713369
         0.281200356458082
         0.290900687842075
         0.300424537229282
         0.309111926983635
         0.316302879469068
         0.321337417049515
         0.323741109218905
         0.323781713991152
         0.321912536510165
         0.318586881919852
         0.314258055364123
         0.309379361986887
         0.304404106932054
         0.299785595343532
          0.29597713236523
         0.293432023141058
         0.292489460685004
         0.293032189491368
         0.294828841924531
         0.297648050348872
         0.301258447128771
         0.305428664628609
         0.309927335212765
         0.314523091245618
         0.318984565091549
         0.323080389114938
         0.326579195680164
         0.329249617151608
         0.330942039655212
         0.331833864363177
         0.332184246209265
         0.332252340127239
         0.332297301050863
         0.332578283913898
          0.33335444365011
         0.334884935193259
         0.337428913477111
         0.341245533435426
         0.346530720545872
         0.353227482461721
          0.36121559738015
         0.370374843498336
         0.380584999013454
          0.39172584212268
         0.403677151023192
         0.416318703912164
         0.429530278986773
         0.443191654444197
         0.457182608481609
         0.471382919296188
         0.485672365085109
         0.499930724045548
         0.514037774374681
         0.527863503990741
         0.541238739696186
         0.553984518014528
         0.565921875469282
         0.576871848583961
         0.586655473882078
         0.595093787887147
         0.602007827122682
         0.607269681917838
          0.61095565782434
         0.613193114199558
         0.614109410400857
         0.613831905785607
         0.612487959711174
         0.610204931534926
         0.607110180614231
         0.603331066306458
         0.598994947968972
         0.594229184959143
         0.589161136634337
         0.583930417972631
         0.578725666434929
         0.573747775102845
         0.569197637057991
         0.565276145381981
         0.562184193156428
         0.560122673462945
         0.559292479383144
         0.559894503998639
         0.562129640391043
         0.566198781641968
         0.572302820833029
         0.580642651045837
         0.591419165362006
         0.604833256863149
         0.621085818630879
          0.64037774374681
         0.662909925292553
         0.688883256349722
         0.71849862999993];

[Adam Danz]

Your data are column vectors and you've got two mistakes related to that.

1. fliplr does nothing with a column vector.
2. you want to vertically concatenate them, not horizontally.

[Sim]

Thanks a lot Adam! Yes, my silly mistake... :)

Answer 1

[Star Strider]

Use the patch function instead:

figure
patch([x; flipud(x)], [curve1; flipud(curve2)], 'r')

producing:

.

[Sim]

Thanks a lot!! :)

[Star Strider]

As always, my pleasure!

[Bruno Luong]

As Adam Danz rightly pointed out PATCH has nothing to do with fixing the issue, rather formatting the verticall data.

fill([x; flipud(x)], [curve1; flipud(curve2)], 'r')

works as well.

[Sim]

Thanks both Star and Bruno :) ...Yes, it was my stupid mistake :)