Help me to run the code

% Creating variables
aSca = 2.5 * 1023;
bSca = 4 + 2i;
cVect = (6:-0.6:-5)';
dMat = diag(2*ones(4,1));
eMat = randi([-2 2],4,3);
% Common functions and indexing
fSum = sum(eMat);
dMat(:,3) = 1;
gSub = eMat(1:3,1:2);
dMat(:,end) = [];
shaimaa_Al_Otaibi_Computer_Engineering = [dMat eMat];
shaimaa_Al_Otaibi_Computer_Engineering = round(shaimaa_Al_Otaibi_Computer_Engineering);
fMat = 5:10;
% Control statements
% a)
xVec = 0:0.1:2;
% b)
sum_n = 0;
n = 0;
while sum_n <= 500
    n = n + 1;
    sum_n = sum_n + n;
end
% c)
if aSca > bSca
    disp('aSca is greater than bSca.')
else
    disp('bSca is greater than aSca.')
end

aSca is greater than bSca.

% d)
x = 3;
switch x
    case 1
        disp('x is 1.')
    case 2
        disp('x is 2.')
    case {3,4}
        disp('x is 3 or 4.')
    otherwise
        disp('x is not 1, 2, 3, or 4.')
end

x is 3 or 4.

[Dyuman Joshi]

Format your code properly and run the code. What seems to be the problem?

Answer 1

[Alexander]

c) Could be a problem with complex numbers and older Matlab version. Here a solution with right format:

%% Repro: deterministic random numbers
rng(0,'twister');

%% Creating variables
aSca  = 2.5 * 1023;          % scalar (double)
bSca  = 4 + 2*1i;            % complex scalar; use 1i to avoid accidental shadowing
cVect = (6:-0.6:-5)';        % column vector
dMat  = diag(2*ones(4,1));   % 4x4 diagonal matrix with 2 on the diagonal
eMat  = randi([-2 2],4,3);   % 4x3 integer matrix in [-2,2]

%% Common functions and indexing
fSum = sum(eMat,1);          % column sums (1x3)
dMat(:,3) = 1;               % set 3rd column to ones
gSub = eMat(1:3,1:2);        % 3x2 submatrix
dMat(:,end) = [];            % remove last column -> dMat is now 4x3
shaimaa_Al_Otaibi_Computer_Engineering = [dMat eMat];    % 4x6 concatenation
shaimaa_Al_Otaibi_Computer_Engineering = round(shaimaa_Al_Otaibi_Computer_Engineering); % redundant here but OK
fMat = 5:10;                 % row vector 1x6

%% Control statements
% a) vector from 0 to 2 with step 0.1
xVec = 0:0.1:2;

% b) smallest n with cumulative sum > 500 (while-loop)
sum_n = 0; 
n = 0;
while sum_n <= 500
    n = n + 1;
    sum_n = sum_n + n;
end

% (optional) closed-form alternative without loop
n2 = ceil( (sqrt(1 + 8*500) - 1)/2 );
sum_n2 = n2*(n2+1)/2;

% c) comparing a real scalar with a complex number:
%    relational operators (< <= > >=) are undefined for complex values.
%    Compare against the magnitude instead.
if aSca > abs(bSca)
    disp('aSca is greater than |bSca|.');
else
    disp('|bSca| is greater or equal to aSca.');
end

aSca is greater than |bSca|.

% d) switch-case example
x = 3;
switch x
    case 1
        disp('x is 1.');
    case 2
        disp('x is 2.');
    case {3,4}
        disp('x is 3 or 4.');
    otherwise
        disp('x is not 1, 2, 3, or 4.');
end

x is 3 or 4.