Display or print char data

 x = input(‘Enter the grades: ’)
For i=1:length(x)
 if  x(i) >= 90
     x(i)= 'A';
 elseif  x(i) >= 80
     x(i) = 'B';
 elseif  x(i) >= 70
     x(i) = 'C';
 elseif  x(i) >= 60
     x(i) = 'D';
 else
     x(i) = 'F';
 end
end
 disp(x)

• Input:[10 12 90 60 47 78]
• output:[70 70 65 68 70 67]
• # | When I turn on this code, it prints numbers instead of letters on the screen and gives me a warning message that the argument must be of type of char, is there an answer please? (Sorry, the first code wasn’t the desired)😅

[KSSV]

The code looks fine.....it prints the grade as string..

[Walter Roberson]

The code works for me... at least after I removed the _ that you accidentally had at the end of the line.

Answer 1

[madhan ravi]

 clear all

It worked for me after removing _ at the very end

[madhan ravi]

 x = input('Enter the grades: ') % enter [10 12 90 60 47 78]
 x = num2cell(x);
for ii = 1:numel(x)
 if  x{ii} >= 90
     x{ii}= 'A';
 elseif  x{ii} >= 80
     x{ii} = 'B';
 elseif  x{ii} >= 70
     x{ii} = 'C';
 elseif  x{ii} >= 60
     x{ii} = 'D';
 else
     x{ii} = 'F';
 end
end
 celldisp(x)

[Adham Ayman]

madhan ravi It's perfect, but is there a way to put them all in a row vector and without quotes.

[madhan ravi]

 categorical(x)

[Adham Ayman]

ok, thank you for great help :)

Answer 2

[Image Analyst]

I would use fprintf() instead of disp(). I also wouldn't use the same variable to be a double, and a string, at different times. I think that's bad practice. Here is one way of doing it:

numberGrades = input('Enter the grades (inside brackets) : ')
for k = 1 : length(numberGrades)
	if  numberGrades(k) >= 90
		letterGrade{k} = 'A';
	elseif  numberGrades(k) >= 80
		letterGrade{k} = 'B';
	elseif  numberGrades(k) >= 70
		letterGrade{k} = 'C';
	elseif  numberGrades(k) >= 60
		letterGrade{k} = 'D';
	else
		letterGrade{k} = 'F';
	end
	fprintf('A score of %d is an "%s".\n', numberGrades(k), letterGrade{k});
end

numberGrades =

40 88

A score of 40 is an "F".

A score of 88 is an "B".

Another way would be to use a table with numbers in the first column and letters in the second column.

numberGrades = input('Enter the grades (inside brackets) : ')
grades = table(...
	'Size', [length(numberGrades), 2],...
	'VariableNames', {'NumberGrade', 'LetterGrade'},...
	'VariableTypes', {'double', 'string'});
grades{:, 1} = numberGrades'; % Put number grades into column 1.
for k = 1 : length(numberGrades)
	if  numberGrades(k) >= 90
		grades{k, 2} = 'A';
	elseif  numberGrades(k) >= 80
		grades{k, 2} = 'B';
	elseif  numberGrades(k) >= 70
		grades{k, 2} = 'C';
	elseif  numberGrades(k) >= 60
		grades{k, 2} = 'D';
	else
		grades{k, 2} = 'F';
	end
	fprintf('A score of %d is an "%s".\n', grades{k, 1}, grades{k, 2});
end
grades

Enter the grades (inside brackets) : [85,77,96]

numberGrades =

85 77 96

A score of 85 is an "B".

A score of 77 is an "C".

A score of 96 is an "A".

grades =

3×2 table

NumberGrade LetterGrade

___________ ___________

85 "B"

77 "C"

96 "A"