Question

matlab

1. (5 pts) This question requires: matrix manipulation, single for loop, ifelse statement, data input, m script file We have 80 number grades held in a matrix (grad m as you did the gradebook project in es MATLAB lab 1). The letter grades are given by following the rule: "A" 90)."B" 80), "C" P 70), "D" P 60), "F" (<60) and "S" "0): "S" standards for sick. Write one script file to Give the letter grade to EACH number grade in the matrix Put the letter grades in a 10 x 8 matrix The letter grade matrix should look like: cBBBADCB ACDBACSA BACB BBCA SAC BBCAB DAS BSBBA ABBA ADAB ABAAAABA BBC BAABC

Answer 1

Matlab code:

clear all;
fprintf('Grade Matrix \n');
matrix = randi([0,100],10,8) %Generate a grade matrix with random values in 0 to 100
Grade = repmat(' ',[10 8]); %intialise letter-grade matrix

for i = 1:10
for j = 1:8
if(matrix(i,j) >= 90)
Grade(i,j) = 'A';
elseif(matrix(i,j) >= 80)
Grade(i,j) = 'B';
elseif(matrix(i,j) >= 70)
Grade(i,j) = 'C';
elseif(matrix(i,j) >= 60)
Grade(i,j) = 'D';
elseif(matrix(i,j) == 0)
Grade(i,j) = 'S';
else
Grade(i,j) = 'F';
end

end
end
fprintf('Letter Grade Matrix \n');
Grade

Sample Output:

Grade Matrix 
matrix =

   96   31   64   67   64   48   60   22
   16   25   38   25   62   31   79   43
   62   11   67   84   98   99    5    6
   59    8   32   73   41   81    8   10
   11   18   92   63   95   12   26   41
   83   66   88   13   64   99   24   50
   66   10    0   69   19   88   71   62
   13   27   42   27   36    0   78   33
   86   86   42   92   46   25   97   88
   87   24   70   90   58   77   55   64

Letter Grade Matrix 
Grade =

AFDDDFDF
FFFFDFCF
DFDBAAFF
FFFCFBFF
FFADAFFF
BDBFDAFF
DFSDFBCD
FFFFFSCF
BBFAFFAB
BFCAFCFD