matrices specific value selection

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

Answer 1

[Voss]

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

[Ihaveaquest]

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]

You're welcome!

And here are some links to relevant documentation about accessing specific elements from arrays in MATLAB:

https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

https://www.mathworks.com/help/matlab/math/array-indexing.html

https://www.mathworks.com/help/matlab/ref/colon.html