Nested loop in 3 d matrix

I have a matrix of order 3*7

    12    10     8    22    18    20    30
    10    5      12   18    15    22    28
    13    30     32   12    11    16    25

I want to add each element of every to each element of other rows

i.e. a1 a2 a3 a4 a5 a6 a7

c1 c2 c3 c4 c5 c6 c7 b1 b1 . . . . .

c1 c2 c3 c4 c5 c6 c7 b2 b2 . . . . .

c1 c2 c3 c4 c5 c6 c7 b3 b3 . . . . .

c1 c2 c3 c4 c5 c6 c7 b4 b4 . . . . .

c1 c2 c3 c4 c5 c6 c7 b5 b5 . . . . .

c1 c2 c3 c4 c5 c6 c7 b6 b6 . . . . .

c1 c2 c3 c4 c5 c6 c7 b7 b7 . . . . .

How can I do this using for loop ?

[David Hill]

Hard to understand. Show the output you want using a smaller input matrix.

[Mohammad Juned]

let a a matrix of 3*3

1 2 3

4 5 6

7 8 9

now we add each element such as

1 + { (4+7) (4+8) (4+9)

(5+7) (5+8) (5+9)

(6+7) (6+8) (6+9) }

2+{ (4+7) (4+8) (4+9)

(5+7) (5+8) (5+9)

(6+7) (6+8) (6+9) }

3+{ (4+7) (4+8) (4+9)

(5+7) (5+8) (5+9)

(6+7) (6+8) (6+9) }

since this is a matrix of 3*3 order size therefore we have 3*3*3 i.e.27 elements in it.

for 3*7 we would have 7*7*7 i.e. 343 elements.

Answer 1

[David Hill]

m=[12    10     8    22    18    20    30
    10    5      12   18    15    22    28
    13    30     32   12    11    16    25];
b=m(3,:)+m(2,:)';
for k=1:size(m,2)
  M(:,:,k)=m(1,k)+b;
end

[Mohammad Juned]

still not getting the right answer b is just adding up the b1 to c1 b2 to c2 b3 to c3 and so on

23    35    44    30    26    38    53

I want to add b1 to all elemnts of row c i.e.

10+13, 10+30, 10 +32 ........10+25

5+13, 5+30, 5+32......................5+25

.

.

.28+13, 28+30, 28+32............28+25

and then adding all these outcome to all elements of a.

[David Hill]

Works for your examples. If I am not understanding, you will need to explain further.

M(:,:,1) =

    35    52    54    34    33    38    47
    30    47    49    29    28    33    42
    37    54    56    36    35    40    49
    43    60    62    42    41    46    55
    40    57    59    39    38    43    52
    47    64    66    46    45    50    59
    53    70    72    52    51    56    65


M(:,:,2) =

    33    50    52    32    31    36    45
    28    45    47    27    26    31    40
    35    52    54    34    33    38    47
    41    58    60    40    39    44    53
    38    55    57    37    36    41    50
    45    62    64    44    43    48    57
    51    68    70    50    49    54    63


M(:,:,3) =

    31    48    50    30    29    34    43
    26    43    45    25    24    29    38
    33    50    52    32    31    36    45
    39    56    58    38    37    42    51
    36    53    55    35    34    39    48
    43    60    62    42    41    46    55
    49    66    68    48    47    52    61


M(:,:,4) =

    45    62    64    44    43    48    57
    40    57    59    39    38    43    52
    47    64    66    46    45    50    59
    53    70    72    52    51    56    65
    50    67    69    49    48    53    62
    57    74    76    56    55    60    69
    63    80    82    62    61    66    75


M(:,:,5) =

    41    58    60    40    39    44    53
    36    53    55    35    34    39    48
    43    60    62    42    41    46    55
    49    66    68    48    47    52    61
    46    63    65    45    44    49    58
    53    70    72    52    51    56    65
    59    76    78    58    57    62    71


M(:,:,6) =

    43    60    62    42    41    46    55
    38    55    57    37    36    41    50
    45    62    64    44    43    48    57
    51    68    70    50    49    54    63
    48    65    67    47    46    51    60
    55    72    74    54    53    58    67
    61    78    80    60    59    64    73


M(:,:,7) =

    53    70    72    52    51    56    65
    48    65    67    47    46    51    60
    55    72    74    54    53    58    67
    61    78    80    60    59    64    73
    58    75    77    57    56    61    70
    65    82    84    64    63    68    77
    71    88    90    70    69    74    83

[Mohammad Juned]

When I am running your code the out shows like this but your output is showing differently

allcomb
    23    35    44    30    26    38    53


(:,:,1) =

    35    47    56    42    38    50    65


(:,:,2) =

    33    45    54    40    36    48    63


(:,:,3) =

    31    43    52    38    34    46    61


(:,:,4) =

    45    57    66    52    48    60    75


(:,:,5) =

    41    53    62    48    44    56    71

[David Hill]

If you copy and paste my code above in your command window and run, you will get my output.

[Mohammad Juned]

I have copied and pasted this code but still not getting the answer

m=[12    10     8    22    18    20    30
    10    5      12   18    15    22    28
    13    30     32   12    11    16    25];
b=m(3,:)+m(2,:)';
for k=1:size(m,2)
  M(:,:,k)=m(1,k)+b;
end

[David Hill]

What release of matlab are you using? You may have to change this line

b=m(3,:)+m(2,:)';%if this is not giving you the correct matrix

with:

b=repmat(m(3,:),size(m,2),1)+repmat(m(2,:)',1,size(m,2));

[Mohammad Juned]

Thank you David Hill I have got the right output. One more query

how can i save this 343 values in a single matrix

[David Hill]

It already is saved in a single matrix M.

[Mohammad Juned]

I am using R2014a

I have to to do more operation on the matrix M. So can it be performed .