matrices specific value selection

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Ihaveaquest
Ihaveaquest am 29 Aug. 2022
Kommentiert: Voss am 30 Aug. 2022
disp(B.values(2:1:end));
im trying to use this format but it gives me all of the numbers i need the first number and last of multiple sections
B.values =
val(:,:,1) =
92 99 1 8 15 67 74 51 58 40
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59
val(:,:,2) =
88 99 1 8 15 67 74 51 58 69
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59
val(:,:,3) =
4 99 1 8 15 67 74 51 58 68
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59

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Akzeptierte Antwort

Voss
Voss am 29 Aug. 2022
Ran in:
Like this?
% constructing your B.values
B.values = cat(3,[ ...
92 99 1 8 15 67 74 51 58 40
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59],[ ...
88 99 1 8 15 67 74 51 58 69
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59],[ ...
4 99 1 8 15 67 74 51 58 68
98 80 7 14 16 73 55 57 64 41
4 81 88 20 22 54 56 63 70 47
85 87 19 21 3 60 62 69 71 28
86 93 25 2 9 61 68 75 52 34
17 24 76 83 90 42 49 26 33 65
23 5 82 89 91 48 30 32 39 66
79 6 13 95 97 29 31 38 45 72
10 12 94 96 78 35 37 44 46 53
11 18 100 77 84 36 43 50 27 59])
B = struct with fields:
values: [10×10×3 double]
% first value of each page
B.values(1,1,:)
ans =
ans(:,:,1) = 92 ans(:,:,2) = 88 ans(:,:,3) = 4
% last value of each page
B.values(end,end,:)
ans =
ans(:,:,1) = 59 ans(:,:,2) = 59 ans(:,:,3) = 59
  2 Kommentare
Ihaveaquest
Ihaveaquest am 30 Aug. 2022
Thank you works like magic! I tried everything but the option (x,x,:) great help
I wish there was a list with these options listed, heres the ones i have used for anyone looking
variables
disp(A);
disp(B);
disp(A(1,:)); %reads first complete row --->>>
disp(B(2:2:end)); %reads Second row and and first column every two location
disp(A(:,1)); %reads all of first column
disp(B(:,2:end)); %reads second column until end
disp(B(2,:,2:end));
disp(B(2:1:end));
disp(B(2,1,:));
Voss
Voss am 30 Aug. 2022

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