MATLAB: Matlab row Subtraction operation change only 2nd row

matrix manipulation

In Matlab after subtraction operation of row2 of the same matrix(eg:-row2' = row2-row1) how to rewrite the resulatant matrix where 1st row is as it is and 2nd row' = row2 – row1 A'=[row1; row2']

Best Answer

Aprime = A;
Aprime(2,:) = Aprime(2,:) - Aprime(1,:);

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MATLAB: Matlab row subtraction of matrix

On the other hand, maybe you want to subtract row 2 from all the rows. In that case, you can do this.

>> A
A =
     1     2     3     4
    11    12    13    14
    22    23    24    25
    42    43    44    45
>> AsubRow2 = A - A(2,:)
AsubRow2 =
   -10   -10   -10   -10
     0     0     0     0
    11    11    11    11
    31    31    31    31

MATLAB: Swap rows and columns of a matrix

x = [2 1 3];
A_New = A(x,x);

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MATLAB: Matlab row subtraction of matrix

MATLAB: Swap rows and columns of a matrix

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