MATLAB: How to replace the element in matrix

MATLABmatrix arraymatrix manipulation

i have a matrix

if true
  A = [ 1 5 9 7
        3 5 7 8
        8 2 4 6 ];
end
now i want to put number 12 in the location of A(2,2)
also i want to put number 13 in the location of A(3,3)
how can i do please help me

Best Answer

A(2,2)=12;
A(3,3)=13;

Related Solutions

MATLAB: How to do the following in a simpler and smarter way

C=repmat(1:21,12,1)
C=C(:)'

%or

C=1:21;
C=reshape(C(ones(12,1),:),1,[])

MATLAB: How to replace values in a matrix

Try a simple for loop:

A=[ 0.2 0.07 0.25 0.87 0.09 0.14 0.8 0.3;
  0.1 0.5 0.25 0.14 0.98 0.025 0.58 0.11;
  0.001 0.25 0.88 0.21 0.03 0.25 0.58 0.25;
  0.26 0.58 0.001 0.06 0.9 0.58 0.44 0.15;
  0.12 0.58 0.16 0.08 0.15 0.47 0.33 0.15;
  0.15 0.22 0.3 0.14 0.01 0.99 0.77 0.55;
  0.003 0.25 0.14 0.99 0.005 0.85 0.26 0.003;
  ];
B=[ 0.25 0.55 0.15 0.02;
  0.001 0.25 0.33 0.04;
  0.2 0.3 0.11 0.58;
  0.25 0.14 0.77 0.69;
  0.88 0.59 0.58 0.001;
  0.02 0.3 0.7 0.8;
  0.3 0.9 0.66 0.11;]
C= [ 8 2 4 1
  1 2 3 4
  7 5 2 8
  1 2 3 4
  2 4 3 7
  1 5 6 7
  2 8 4 1]
[rows, columns] = size(B)
newA = A; % Initialize.
for row = 1 : rows
  newA(row, C(row,:)) = B(row, :);
end
newA % Print in command window to verify

Best Answer

Related Solutions

MATLAB: How to do the following in a simpler and smarter way

MATLAB: How to replace values in a matrix

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