MATLAB: How to delete an repeated values in matrix

mathematicsmatrixmatrix manipulation

I have matrix like this, so how to delete repeated values in this case?

 [a b]=[197.9040   11.6502     41.6502   41.3856    41.3856     0      197.9040
         12.2180   51.2008     61.2008  104.3122   104.3122     0       12.2180];

Best Answer

A = [197.9040, 11.6502, 41.6502, 41.3856, 41.3856, 0, 197.9040, 12.2180, 51.2008, 61.2008, 104.3122, 104.3122, 0, 12.2180];
>> A(sum(bsxfun(@(a,b)abs(a-b)<1e-6,A,A(:)))<2)
ans =   
   11.6502   41.6502   51.2008   61.2008

Because your values are floating point it is best to avoid using eq, unique and the like, which only work for exactly identical values . Instead I used a tolerance of 1e-6, and values closer than this tolerance are assumed to be the same. You can change the tolerance to suit your values.

Related Solutions

MATLAB: Problems with the vector output from FOR as a plot3 argument

The cell arrays don’t make sense in this context. Just use regular matrix notation.

This works for me (I added grid on so the plot has a context):

H=6.31;
K=104;
M=2208.5;
X=[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576,577,578,579,580,581,582,583,584,585,586,587,588,589,590,591,592,593,594,595,596,597,598,599,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614,615,616,617,618,619,620,621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,636,637,638,639,640,641,642,643,644,645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690,691,692,693,694,695,696,697,698,699,700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,747,748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817,818,819,820,821,822,823,824,825,826,827,828,829,830,831,832,833,834,835,836,837,838,839,840,841,842,843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,860,861,862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,879,880,881,882,883,884,885,886,887,888,889,890,891,892,893,894,895,896,897,898,899,900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,915,916,917,918,919,920,921,922,923,924,925,926,927,928,929,930,931,932,933,934,935,936,937,938,939,940,941,942,943,944,945,946,947,948,949,950,951,952,953,954,955,956,957,958,959,960,961,962,963,964,965,966,967,968,969,970,971,972,973,974,975,976,977,978,979,980,981,982,983,984,985,986,987,988,989,990,991,992,993,994,995,996,997,998,999,1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1011,1012,1013,1014,1015,1016,1017,1018,1019,1020,1021,1022,1023,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100,1101,1102,1103,1104,1105,1106,1107,1108,1109,1110,1111,1112,1113,1114,1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126,1127,1128,1129,1130,1131,1132,1133,1134,1135,1136,1137,1138,1139,1140,1141,1142,1143,1144,1145,1146,1147,1148,1149,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160,1161,1162,1163,1164,1165,1166,1167,1168,1169,1170,1171,1172,1173,1174,1175,1176,1177,1178,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189,1190,1191,1192,1193,1194,1195,1196,1197,1198,1199,1200,1201,1202,1203,1204,1205,1206,1207,1208,1209,1210,1211,1212,1213,1214,1215,1216,1217,1218,1219,1220,12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1086,11082,11078,11074,11070,11066,11062,11058,11054,11050,11046,11042,11038,11034,11030,11026,11022,11018,11014,11010,11006,11002,10998,10994,10990,10986,10982,10978,10974,10970,10966,10962,10958,10954,10950,10946,10942,10938,10934,10930,10926,10922,10918,10914,10910,10906,10902,10898,10894,10890,10886,10882,10878,10874,10870,10866,10862,10858,10854,10850,10846,10842,10838,10834,10830,10826,10822,10818,10814,10810,10806,10802,10798,10794,10790,10786,10782,10778,10774,10770,10766,10762,10758,10754,10750,10747,10744,10741,10738,10735,10732,10729,10726,10723,10720,10717,10714,10711,10708,10705,10702,10699,10696,10693,10690,10687,10684,10681,10678,10675,10672,10669,10666,10663,10660,10657,10654,10651,10648,10645,10642,10639,10636,10633,10630,10627,10624,10621,10618,10615,10612,10609,10606,10603,10600,10597,10594,10591,10588,10585,10582,10579,10576,10573,10570,10567,10564,10561,10558,10555,10552,10549,10546,10543,10540,10537,10534,10531,10528,10525,10522,10519,10516,10513,10510,10507,10504,10501,10498,10495,10492,10489,10486,10483,10480,10477,10474,10471,10468,10465,10462,10459,10456,10453,10450,10447,10444,10441,10438,10435,10432,10429,10426,10423,10420,10417,10414,10411,10408,10405,10402,10399,10396,10393,10390,10387,10384,10381,10378,10375,10372,10369,10366,10363,10360,10357,10354,10351,10348,10345,10342,10339,10336,10333,10330,10327,10324,10321,10318,10315,10312,10309,10306,10303,10300,10297,10294,10291,10288,10285,10282,10279,10276,10273,10270,10267,10264,10261,10258,10255,10252,10249,10246,10243,10240,10237,10234,10231,10228,10225,10222,10219,10216,10213,10210,10207,10204,10201,10198,10195,10192,10189,10186,10183,10180,10177,10174,10171,10168,10165,10162,10159,10156,10153,10150,10147,10144,10141,10138,10135,10132,10129,10126,10123,10120,10117,10114,10111,10108,10105,10102,10099,10096,10093,10090,10087,10084,10081,10078,10075,10072,10069,10066,10063,10060,10057,10054,10051,10048,10045,10042,10039,10036,10033,10030,10027,10024,10021,10018,10015,10012,10009,10006,10003,10000];
Z=1:1:2001;
for n=1:1:2001
     if(n+K>2000)
         Z(n)=0;
     else
         if(Y(n+K)/10>=M)
         Z(n)=0;
         else
             Z(n)=floor(((Y(n+K))*H)/(M-(Y(n+K))/10));
         end
     end
%     fprintf('%d\n',Z(n))
end
figure
plot3(X,Y,Z)
grid on

MATLAB: Pulling the hair out over this simple for loop! Please help!

You need to initialize trade as cell, such as

trade = {};

Then in your loop you need

trade{i} = date(ia1(i):ia2(i));

You are extracting a number of datetime objects at the same time, so each date(ia1(i):ia2(i)) is going to produce a vector of datetime objects. You have been attempting to store that vector into a single location, trade(i) . Only cell arrays can store multiple values inside locations designated with a single index.

Later you will need to use {} notation to extract the vector of datetime objects when you want to use the vector.

Best Answer

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