MATLAB: Transpose single column onto a Geometry

geometry

Hi, I have (26 x 1) W = 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, and want to use X(26 x 2) which is the address matrix for G…
X =
     2     2
     3     2
     4     2
     2     3
     3     3
     4     3
     2     4
     3     4
     4     4
     2     5
     3     5
     4     5
     2     6
     3     6
     4     6
     2     7
     3     7
     4     7
     2     8
     3     8
     4     8
     2     9
     3     9
     4     9
     2    10
     3    10,
to transpose W onto: G =
    -1    -1    -1    -1    -1    -1    -1    -1    -1    -1
    -1     0     0     0     0     0     0     0     0     0
    -1     0     0     0     0     0     0     0     0     0
    -1     0     0     0     0     0     0     0     0     5

Best Answer

This is a variation on your earlier Question How to index a matrix, and the solution is similar:
%Matrix size
columns=10;
rows=4;
%Blank matrix
X = zeros(4,10);
%Fill matrix (1st row & first column)
newrow =-ones(1,columns);    % the row to replace row 1 with
newcolumn=-ones(rows,1);     % the column to replace column 1 with
X(1,:)= newrow ;         % replace row 1 in a with new
X(:,1) = newcolumn(:);          % replace column 1 in a with new
zi = find(X == 0);
X(zi) = [W; 5]'
X =
      -1    -1    -1    -1    -1    -1    -1    -1    -1    -1
      -1    21    24    27    30    33    36    39    42    45
      -1    22    25    28    31    34    37    40    43    46
      -1    23    26    29    32    35    38    41    44     5
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