IF statements, and its outputs.

How should I code the if statements so I can organise the 10 outputs of each if statement into a row vector; of which I will further on place into a matrix with a few a few other row vectors?. The Marks row vector is filled prior to the 2 if statements.

Marks = [MarkAnn,MarkBob,MarkJan,MarkJim,MarkJoe,MarkKai,MarkPam,MarkSam,MarkTom,MarkZoe];

Percentages = Marks*10;

for a=1: length(Marks)

if Marks>=5

      grade = PASS

else

      grade = FAIL

end

end

for a=1: length(Percentages)

if Percentages<50

      gpa = FAIL

elseif Percentages>=50, Percentages<65

      gpa = PASS

elseif Percentages>=65, Percentages<75

      gpa = CREDIT

elseif Percentages>=75, Percentages<85

      gpa = DISTINSTION

elseif Percentages>=85

      gpa = HIGH_DICTINCTION

end

end

Answer 1

[Arnaud Miege]

One possible solution:

grade = cell(size(Marks));
for a=1: length(Marks)
    if Marks(a)>=5
       grade{a} = 'PASS';
    else
       grade{a} = 'FAIL';
    end
end

Use a similar approach for gpa. It might possible to vectorize the for loops.

HTH,

Arnaud

[Arnaud Miege]

Are PASS and FAIL variables that have already been defined or just strings. The code I posted is for strings. If they are variables, you'll need to do that instead:

grade = zeros(size(Marks));

for a=1: length(Marks)

if Marks(a)>=5

grade(a) = PASS;

else

grade(a) = FAIL;

end

end

or simply

grade = zeros(size(Marks));

grade(Marks>=5) = PASS;

grade(Marks<5) = FAIL;

[Benaiah]

What u suggested worked, as i now get all the row vectors needed for the matrix in the workspace.

But it returns the error "??? Error using ==> vertcat

CAT arguments dimensions are not consistent." Therefore stopping the output of the matrix.

How can i stop that error from occurring??

[Arnaud Miege]

Which line of code does the error point to? Can you post your updated code?

Answer 2

[bym]

Percentages=rand(10,1)*100;
gpa = cell(1,length(Percentages));
for a = 1:length(Percentages)

      if Percentages(a) < 50
          gpa{a} = 'fail';
      elseif Percentages(a) >=50 && Percentages(a) < 65
          gpa{a} = 'pass';
      elseif Percentages(a) >=65 && Percentages(a) < 75
          gpa{a} = 'credit';
      elseif Percentages(a) >=75 && Percentages(a) < 85
          gpa{a} = 'distiction';
      else
          gpa{a} = 'high distinction';
      end   %if
  end %for
    gpa'

Answer 3

[Walter Roberson]

NameMarkGradeGPA = [Names;num2cell(Marks);Grade;GPA]

[Benaiah]

Thanks for all the help guys, i really appreciate it.

Answer 4

[Benaiah]

Everything works, but it won't give me the output matrix due to the same error of

"??? Error using ==> vertcat CAT arguments dimensions are not consistent."

I know the Marks row vector is causing the problem as the code below demonstrates.

 NameMarkGradeGPA = [Names;Grade;GPA]

NameMarkGradeGPA = 

Columns 1 through 9

    'Ann'     'Bob'     'Jan'     'Jim'     'Joe'     'Kai'     'Pam'       'Sam'            'Tom'             
    'FAIL'    'FAIL'    'FAIL'    'FAIL'    'PASS'    'PASS'    'PASS'      'PASS'           'PASS'            
    'FAIL'    'FAIL'    'FAIL'    'FAIL'    'PASS'    'PASS'    'CREDIT'    'DISTINSTION'    'HIGH_DICTINCTION'

Column 10

    'Zoe'             
    'PASS'            
    'HIGH_DICTINCTION'

How can i put the Marks row vector into the matrix without the vertcat error occuring.