Make the curves more smoother

4 views (last 30 days)
SIEF ADDEEN
SIEF ADDEEN on 27 Feb 2024
Answered: Mathieu NOE on 27 Feb 2024
this is the code that i used what is the command thats will make the curves more smoother
A=[-15
-14.8
-14.6
-14.4
-14.2
-14
-13.8
-13.6
-13.4
-13.2
-13
-12.8
-12.6
-12.4
-12.2
-12
-11.8
-11.6
-11.4
-11.2
-11
-10.8
-10.6
-10.4
-10.2
-10
-9.8
-9.6
-9.4
-9.2
-9
-8.8
-8.6
-8.4
-8.2
-8
-7.8
-7.6
-7.4
-7.2
-7
-6.8
-6.6
-6.4
-6.2
-6
-5.8
-5.6
-5.4
-5.2
-5
-4.8
-4.6
-4.4
-4.2
-4
-3.8
-3.6
-3.4
-3.2
-3
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-2.6
-2.4
-2.2
-2
-1.8
-1.6
-1.4
-1.2
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
5.8
6
6.2
6.4
6.6
6.8
7
7.2
7.4
7.6
7.8
8
8.2
8.4
8.6
8.8
9
9.2
9.4
9.6
9.8
10
10.2
10.4
10.6
10.8
11
11.2
11.4
11.6
11.8
12
12.2
12.4
12.6
12.8
13
13.2
13.4
13.6
13.8
14
14.2
14.4
14.6
14.8
15
15.2
15.4
15.6
15.8
16
16.2
16.4
16.6
16.8
17
17.2
17.4
17.6
17.8
18
18.2
18.4
18.6
18.8
19
19.2
19.4
19.6
19.8
20
20.2
20.4
20.6
20.8
21
21.2
21.4
21.6
21.8
22
22.2
22.4
22.6
22.8
23
23.2
23.4
23.6
23.8
24
24.2
24.4
24.6
24.8
25
25.2
25.4
25.6
25.8
26
26.2
26.4
26.6
26.8
27
27.2
27.4
27.6
27.8
28
28.2
28.4
28.6
28.8
29
29.2
29.4
29.6
29.8
30
30.2
30.4
30.6
30.8
31
31.2
31.4
31.6
31.8
32
32.2
32.4
32.6
32.8
33
33.2
33.4
33.6
33.8
34
34.2
34.4
34.6
34.8
35];
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67.3818138
59.96218122
49.96985976
45.84403796
41.603421
35.57693423
34.49262042
33.90460162
24.8089068
17.32748849
18.19638968
18.2078664
15.35446277
13.87503942
13.42757304];
C5=[-5.436548363
-5.463724131
-5.26547918
-4.650237203
-5.718049314
-5.212510529
11.39977165
26.56812625
7.852145137
-8.860207918
-11.52344764
2.051158136
12.2399909
2.80984016
0.078004879
7.228171617
14.07167841
6.287700338
4.112526625
6.539123583
5.352245448
26.55559976
57.42090496
72.91248412
86.10860469
98.12162441
114.3974973
134.108669
145.1704444
147.6292494
145.174077
135.4988567
113.8005836
95.1082745
82.54758608
71.63903161
62.78935045
59.7257034
53.95909499
43.9575315
39.80820612
37.25571652
28.80442465
25.05366388
25.28213565
20.84887028
17.402166
17.67647473
16.14147806
13.92326244
12.58694583];
C6=[-5.836675145
-5.677709439
-5.4259219
-5.223256923
-6.089431742
-5.983109816
4.71167083
16.90427252
34.0456916
17.00831798
-13.66546507
-13.72424012
5.867551253
19.3067561
6.864334222
1.349121153
9.804507798
10.15107088
3.461220503
4.400147849
11.2514045
23.46587901
41.2262568
58.85998917
74.33855933
94.56914366
113.8215187
127.7210014
140.6751317
143.5223611
142.1294533
135.6786854
115.6412847
98.43924021
86.69225397
74.95311578
65.94967258
60.61853171
56.19238065
49.98557204
42.44398766
36.91129727
32.87398141
31.60386123
29.47456098
23.68604898
19.73546299
19.12305045
17.23391399
15.07329282
13.95584184];
hold on
ylim([10 90]);
yticks(10:10:90);
plot (A,B,'LineWidth',1)
plot (A,B1,'LineWidth',1)
plot (A,B2,'LineWidth',1)
plot (A,B3,'LineWidth',1)
plot (A,B4,'LineWidth',1)
plot (A,B5,'LineWidth',1)
plot (A,B6,'LineWidth',1)
xlabel("Crank angle (°)");
ylabel("Pressure (bar)");
yyaxis right
ylim([-20 300]);
yticks(-20:20:300);
plot (A1,C,'K','LineWidth',1)
plot (A1,C1,'r','LineWidth',1)
plot (A1,C2,'b','LineWidth',1)
plot (A1,C3,'.','LineWidth',1)
plot (A1,C4,'G','LineWidth',1)
plot (A1,C5,'LineWidth',1)
plot (A1,C6,'LineWidth',1)
ylabel("Heat release rate (J/°CA)");
legend('40-D','B30','D60B30E10','DBEM10','DBEM15','40-DBME15','D60B30M10');
grid on
title('160 Nm');

Answers (1)

Mathieu NOE
Mathieu NOE on 27 Feb 2024
Hello
there are many options to choose from
one way is to use matlab's smoothdata
or this one (I like very much)
see example below on one of your data
figure
hold on
ylim([10 90]);
yticks(10:10:90);
plot (A,B,'LineWidth',3)
Bs1 = smoothdata(B,'gaussian',10);
Bs2 = smoothn(B);
plot (A,Bs1,'r')
plot (A,Bs2,'g')
legend('raw','smoothdata','smoothn');

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