The test suite generates a random M times N matrix with a random number of rows

Question

The test suite generates a random M times N matrix with a random number of rows columns that is assigned to the variable A. and The element values of the matrix are random double precision numbers that fall in the range from -10 to 10. The matrix has between 5 and 10 rows and between 5 and 10 columns. Assuming A is defined in the workspace, write a script with commands to perform the operations described below and assign the results to the indicated variable names. Add a row to the bottom of A that consists of the mean of each column of A and assign the resulting matrix to B. Still starting with the original matrix A add to the bottom of A that consists of the sum of each column of A and assign a row the resulting matrix to C. Next add a column to C that consists of the sum of each row of C and assign the resulting matrix to D. Solution % Enter the commands for your script in file here. Be sure to assign the matrices specified in the A (n+1, : b = mean (A) B = b (end) C = A D = A;

Explanation / Answer

Matlab Script file

M = round(6*rand(1)+4); % generating random number between 5 and 10
N = round(6*rand(1)+4); % generating random number between 5 and 10
A = 20*rand(M,N)-10; % generating random matrix of size MxN with elements -10 to 10
B = [A; mean(A)]; % The matrix with mean of columns in the additional row
C = [A; sum(A)]; % The matrix with sum of columns in the additional row
D = [C, sum(C')']; % The matrix with sum of rows in the additional column
fprintf('A = ');disp(A); % Displaying A
fprintf('B = ');disp(B);% Displaying B
fprintf('C = ');disp(C);% Displaying C
fprintf('D = ');disp(D);% Displaying D

OUTPUT

>> MatrixOperation
A =
   -2.4278   -5.8452   -1.2860   -4.8387   -3.6244   -0.2278    2.4812   -8.0258
    6.2316   -3.9751   -3.7780   -1.8256   -1.5167    1.5705    3.5827   -4.7626
    0.6565   -0.5815    8.4676    1.8979    0.1572   -5.2543   -2.0897   -3.2929
   -2.9855   -5.3902   -1.3959   -4.7558   -8.2897   -0.8230   -2.6513    3.5946
    8.7800    6.8862   -6.3037    2.0569   -4.7504    9.2618    9.7596   -7.2689
    7.5189   -6.1047    8.0976    4.2243    6.0203    0.9361   -9.2452    4.4245
    1.0031   -5.4816    9.5950   -5.5651   -9.4156    0.4227    7.7034   -7.8648
    2.4495   -6.5858   -1.2226   -7.6516    8.5771   -5.3681    8.2657    3.0751
    1.7409   -5.4467   -7.7776   -4.0665    4.6066   -0.2220    5.9237   -0.1165

B =
   -2.4278   -5.8452   -1.2860   -4.8387   -3.6244   -0.2278    2.4812   -8.0258
    6.2316   -3.9751   -3.7780   -1.8256   -1.5167    1.5705    3.5827   -4.7626
    0.6565   -0.5815    8.4676    1.8979    0.1572   -5.2543   -2.0897   -3.2929
   -2.9855   -5.3902   -1.3959   -4.7558   -8.2897   -0.8230   -2.6513    3.5946
    8.7800    6.8862   -6.3037    2.0569   -4.7504    9.2618    9.7596   -7.2689
    7.5189   -6.1047    8.0976    4.2243    6.0203    0.9361   -9.2452    4.4245
    1.0031   -5.4816    9.5950   -5.5651   -9.4156    0.4227    7.7034   -7.8648
    2.4495   -6.5858   -1.2226   -7.6516    8.5771   -5.3681    8.2657    3.0751
    1.7409   -5.4467   -7.7776   -4.0665    4.6066   -0.2220    5.9237   -0.1165
    2.5519   -3.6139    0.4885   -2.2805   -0.9151    0.0329    2.6367   -2.2486

C =
   -2.4278   -5.8452   -1.2860   -4.8387   -3.6244   -0.2278    2.4812   -8.0258
    6.2316   -3.9751   -3.7780   -1.8256   -1.5167    1.5705    3.5827   -4.7626
    0.6565   -0.5815    8.4676    1.8979    0.1572   -5.2543   -2.0897   -3.2929
   -2.9855   -5.3902   -1.3959   -4.7558   -8.2897   -0.8230   -2.6513    3.5946
    8.7800    6.8862   -6.3037    2.0569   -4.7504    9.2618    9.7596   -7.2689
    7.5189   -6.1047    8.0976    4.2243    6.0203    0.9361   -9.2452    4.4245
    1.0031   -5.4816    9.5950   -5.5651   -9.4156    0.4227    7.7034   -7.8648
    2.4495   -6.5858   -1.2226   -7.6516    8.5771   -5.3681    8.2657    3.0751
    1.7409   -5.4467   -7.7776   -4.0665    4.6066   -0.2220    5.9237   -0.1165
   22.9673 -32.5247    4.3965 -20.5242   -8.2356    0.2958   23.7301 -20.2372

D =
   -2.4278   -5.8452   -1.2860   -4.8387   -3.6244   -0.2278    2.4812   -8.0258 -23.7945
    6.2316   -3.9751   -3.7780   -1.8256   -1.5167    1.5705    3.5827   -4.7626   -4.4731
    0.6565   -0.5815    8.4676    1.8979    0.1572   -5.2543   -2.0897   -3.2929   -0.0392
   -2.9855   -5.3902   -1.3959   -4.7558   -8.2897   -0.8230   -2.6513    3.5946 -22.6967
    8.7800    6.8862   -6.3037    2.0569   -4.7504    9.2618    9.7596   -7.2689   18.4215
    7.5189   -6.1047    8.0976    4.2243    6.0203    0.9361   -9.2452    4.4245   15.8718
    1.0031   -5.4816    9.5950   -5.5651   -9.4156    0.4227    7.7034   -7.8648   -9.6028
    2.4495   -6.5858   -1.2226   -7.6516    8.5771   -5.3681    8.2657    3.0751    1.5393
    1.7409   -5.4467   -7.7776   -4.0665    4.6066   -0.2220    5.9237   -0.1165   -5.3582
   22.9673 -32.5247    4.3965 -20.5242   -8.2356    0.2958   23.7301 -20.2372 -30.1319

>>

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