Unintelligible result in matrix conditions 3D
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Saúl Díaz Rodríguez
2023-3-30
It is something that I tried in Matlab 2020b, 2022b and 2023a.
First of all, the initial matrix it is:
matrix=[122,139,156,173,190,207,224,1,18,35,52,69,86,103,120;138,155,172,189,206,223,15,17,34,51,68,85,102,119,121;154,171,188,205,222,14,16,33,50,67,84,101,118,135,137;170,187,204,221,13,30,32,49,66,83,100,117,134,136,153;186,203,220,12,29,31,48,65,82,99,116,133,150,152,169;202,219,11,28,45,47,64,81,98,115,132,149,151,168,185;218,10,27,44,46,63,80,97,114,131,148,165,167,184,201;9,26,43,60,62,79,96,113,130,147,164,166,183,200,217;25,42,59,61,78,95,112,129,146,163,180,182,199,216,8;41,58,75,77,94,111,128,145,162,179,181,198,215,7,24;57,74,76,93,110,127,144,161,178,195,197,214,6,23,40;73,90,92,109,126,143,160,177,194,196,213,5,22,39,56;89,91,108,125,142,159,176,193,210,212,4,21,38,55,72;105,107,124,141,158,175,192,209,211,3,20,37,54,71,88;106,123,140,157,174,191,208,225,2,19,36,53,70,87,104]
matrix = 15×15
122 139 156 173 190 207 224 1 18 35 52 69 86 103 120
138 155 172 189 206 223 15 17 34 51 68 85 102 119 121
154 171 188 205 222 14 16 33 50 67 84 101 118 135 137
170 187 204 221 13 30 32 49 66 83 100 117 134 136 153
186 203 220 12 29 31 48 65 82 99 116 133 150 152 169
202 219 11 28 45 47 64 81 98 115 132 149 151 168 185
218 10 27 44 46 63 80 97 114 131 148 165 167 184 201
9 26 43 60 62 79 96 113 130 147 164 166 183 200 217
25 42 59 61 78 95 112 129 146 163 180 182 199 216 8
41 58 75 77 94 111 128 145 162 179 181 198 215 7 24
initial_matrix=reshape(matrix,5,3,[]) %3d initial matrix
initial_matrix =
initial_matrix(:,:,1) =
122 202 57
138 218 73
154 9 89
170 25 105
186 41 106
initial_matrix(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
initial_matrix(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
initial_matrix(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
initial_matrix(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
initial_matrix(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
initial_matrix(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
initial_matrix(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
initial_matrix(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
initial_matrix(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
initial_matrix(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
initial_matrix(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
initial_matrix(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
initial_matrix(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
initial_matrix(:,:,15) =
120 185 40
121 201 56
137 217 72
153 8 88
169 24 104
size(initial_matrix)
ans = 1×3
5 3 15
%a)
kk2=initial_matrix;
kk2(kk2(:,1,:)==122,:,kk2(:,1,:)==122)=NaN %convert the vector kk2(1,:,1) into a NaN vector
kk2 =
kk2(:,:,1) =
NaN NaN NaN
138 218 73
154 9 89
170 25 105
186 41 106
kk2(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
kk2(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
kk2(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
kk2(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
kk2(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
kk2(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
kk2(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
kk2(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
kk2(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
kk2(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
kk2(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
kk2(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
kk2(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
kk2(:,:,15) =
120 185 40
121 201 56
137 217 72
153 8 88
169 24 104
size(kk2)
ans = 1×3
5 3 15
%b)
kk3=initial_matrix;
kk3(kk3(:,1,:)==121,:,kk3(:,1,:)==121)=NaN %trying to convert the kk3(2,:,15) into a NaN vector
kk3 =
kk3(:,:,1) =
122 202 57
138 218 73
154 9 89
170 25 105
186 41 106
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,15) =
120 185 40
121 201 56
137 217 72
153 8 88
169 24 104
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,16) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,17) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,18) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,19) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,20) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,21) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,22) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,23) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,24) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,25) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,26) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,27) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,28) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,29) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,30) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,31) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
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0 0 0
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0 0 0
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0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,32) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,33) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,34) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,35) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,36) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,37) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,38) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,39) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
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0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,40) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,41) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,42) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,43) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
kk3(:,:,44) =
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
size(kk3)
ans = 1×3
72 3 72
The a) option works, but the b) option doesn't work. The initial_matrix has a dimension of 5x3x15. The a) option gives a matrix with a dimension of 5x3x15 with the NaNs in their place. The b) option gives a 72x3x72 matrix, and without the NaNs in their place. Why the a) option works, but the b) option fails?
Why does it change the dimensions in b)? Why doesn't change the kk3(2,:,15) into NaN vector?
P.S. the problem also continues in the case of other comparation: > < >= <=
1 个评论
采纳的回答
Shivani
2023-4-4
编辑:Shivani
2023-4-4
I am assuming that we are searching for elements only in the 1st column.
We need to obtain the row and depth indices separately before converting elements in all the columns at that row and depth to NaN. To do so we can run the following commands:
%declaring and initialising intial_matrix as defined in the question
matrix=[122,139,156,173,190,207,224,1,18,35,52,69,86,103,120;138,155,172,189,206,223,15,17,34,51,68,85,102,119,121;154,171,188,205,222,14,16,33,50,67,84,101,118,135,137;170,187,204,221,13,30,32,49,66,83,100,117,134,136,153;186,203,220,12,29,31,48,65,82,99,116,133,150,152,169;202,219,11,28,45,47,64,81,98,115,132,149,151,168,185;218,10,27,44,46,63,80,97,114,131,148,165,167,184,201;9,26,43,60,62,79,96,113,130,147,164,166,183,200,217;25,42,59,61,78,95,112,129,146,163,180,182,199,216,8;41,58,75,77,94,111,128,145,162,179,181,198,215,7,24;57,74,76,93,110,127,144,161,178,195,197,214,6,23,40;73,90,92,109,126,143,160,177,194,196,213,5,22,39,56;89,91,108,125,142,159,176,193,210,212,4,21,38,55,72;105,107,124,141,158,175,192,209,211,3,20,37,54,71,88;106,123,140,157,174,191,208,225,2,19,36,53,70,87,104]
matrix = 15×15
122 139 156 173 190 207 224 1 18 35 52 69 86 103 120
138 155 172 189 206 223 15 17 34 51 68 85 102 119 121
154 171 188 205 222 14 16 33 50 67 84 101 118 135 137
170 187 204 221 13 30 32 49 66 83 100 117 134 136 153
186 203 220 12 29 31 48 65 82 99 116 133 150 152 169
202 219 11 28 45 47 64 81 98 115 132 149 151 168 185
218 10 27 44 46 63 80 97 114 131 148 165 167 184 201
9 26 43 60 62 79 96 113 130 147 164 166 183 200 217
25 42 59 61 78 95 112 129 146 163 180 182 199 216 8
41 58 75 77 94 111 128 145 162 179 181 198 215 7 24
initial_matrix=reshape(matrix,5,3,[]) %3d initial matrix
initial_matrix =
initial_matrix(:,:,1) =
122 202 57
138 218 73
154 9 89
170 25 105
186 41 106
initial_matrix(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
initial_matrix(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
initial_matrix(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
initial_matrix(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
initial_matrix(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
initial_matrix(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
initial_matrix(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
initial_matrix(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
initial_matrix(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
initial_matrix(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
initial_matrix(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
initial_matrix(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
initial_matrix(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
initial_matrix(:,:,15) =
120 185 40
121 201 56
137 217 72
153 8 88
169 24 104
kk3 = initial_matrix
kk3 =
kk3(:,:,1) =
122 202 57
138 218 73
154 9 89
170 25 105
186 41 106
kk3(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
kk3(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
kk3(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
kk3(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
kk3(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
kk3(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
kk3(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
kk3(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
kk3(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
kk3(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
kk3(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
kk3(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
kk3(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
kk3(:,:,15) =
120 185 40
121 201 56
137 217 72
153 8 88
169 24 104
[r1,r2]=find(kk3(:,1,:)==121)
r1 = 2
r2 = 15
kk3(r1,:,r2)=NaN
kk3 =
kk3(:,:,1) =
122 202 57
138 218 73
154 9 89
170 25 105
186 41 106
kk3(:,:,2) =
139 219 74
155 10 90
171 26 91
187 42 107
203 58 123
kk3(:,:,3) =
156 11 76
172 27 92
188 43 108
204 59 124
220 75 140
kk3(:,:,4) =
173 28 93
189 44 109
205 60 125
221 61 141
12 77 157
kk3(:,:,5) =
190 45 110
206 46 126
222 62 142
13 78 158
29 94 174
kk3(:,:,6) =
207 47 127
223 63 143
14 79 159
30 95 175
31 111 191
kk3(:,:,7) =
224 64 144
15 80 160
16 96 176
32 112 192
48 128 208
kk3(:,:,8) =
1 81 161
17 97 177
33 113 193
49 129 209
65 145 225
kk3(:,:,9) =
18 98 178
34 114 194
50 130 210
66 146 211
82 162 2
kk3(:,:,10) =
35 115 195
51 131 196
67 147 212
83 163 3
99 179 19
kk3(:,:,11) =
52 132 197
68 148 213
84 164 4
100 180 20
116 181 36
kk3(:,:,12) =
69 149 214
85 165 5
101 166 21
117 182 37
133 198 53
kk3(:,:,13) =
86 151 6
102 167 22
118 183 38
134 199 54
150 215 70
kk3(:,:,14) =
103 168 23
119 184 39
135 200 55
136 216 71
152 7 87
kk3(:,:,15) =
120 185 40
NaN NaN NaN
137 217 72
153 8 88
169 24 104
In option b) of the question, 72 is the linear index of the element 121 due to which in the solution array we obtain NaN at the 72nd row at depth =72. This is a faulty answer because the desired output requires the elements of all the columns at row =2 and depth =15 to be made into NaN.
However, in option a) we obtain the desired output because the linear index of the element 122 =1 and its row index = 1 & depth index =1.
To obtain the row and depth indices separately we can use the find command. Refer to the documentation for more information on find().
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