I cannot get my code to output the letter grade as an array. Please help?

Question

Kyle Skelly 2016-4-11

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评论： Kyle Skelly 2016-4-11

How do I go about getting the code to output the letters of the grades as an array?

grades = [82, 90, 75, 94, 88, 99, 45, 90]
for a=1 : numel(grades)
  if grades(a) <= 60 
     disp( sprintf( '%d = F', grades(a) ) )
  elseif grades(a) >=60 && grades<70
     disp( sprintf( '%d = D', grades(a) ) )
  elseif grades(a) >=70 && grades<80
     disp( sprintf( '%d = C', grades(a) ) )
  elseif grades(a) >=80 && grades<90
     disp( sprintf( '%d = B', grades(a) ) )
  else grades(a) >=90
     disp( sprintf( '%d = A', grades(a) ) )
  end
end

Thanks in advance!

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Roger Stafford 2016-4-11

Everybody gets a 'B'?

Kyle Skelly 2016-4-11

oops, fixed it

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Answer 1

Kirby Fears 2016-4-11

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编辑：Kirby Fears 2016-4-11

在 MATLAB Online 中打开

You can use a character array to store the letter grades for each score in order.

% Here are some grades  
scores = [82, 90, 75, 94, 88, 99, 45, 90];
% Set up the grading scale
gradeScale = 'ABCDF';
gradeScaleMinScore = [90,80,70,60,0];
% Identify grade for each score
grades = gradeScale(...
    arrayfun(@(g) find(g>=gradeScaleMinScore,1,'first'),scores));