Creating a MatLab code to convert numerical grades into letter grades.

Hey all!

I've currently working on creating a code that will allow me to convert numbers into a letter grade that can be put into a single column vector (1X25) and I can't figure out how to make it work. I thought I may have been onto something with this:

lg=mn; %lg is just what I'm calling letter grade and mn in the mean grade of the students assignments (also a 1X25).

if 90<=mn<=100

disp('A')

elseif 80<=mn<=89

disp('B')

elseif 60<=mn<=79

disp('C')

elseif 40<=mn<=59

disp('D')

elseif mn<40

disp('F')

end

I don't recieve any errors when I run it but it also doesn't provide me with any letter grades.

Any help would be greatly appreciated!

V/R,

Bobby

[David Hill]

x(x>=60&x<70)='D';
x(x>=90)='A';
x(x>=80)='B';
x(x>=70)='C';
x(x<60)='F';
x=char(x);

This provides a char array

[Robert Windham]

I tried doing this with a character array but because I want to include the 25X1 into another huge matrix, it messes up the rest of the matrix (looks like wingdings when I run the code).

Thank you, though!

Answer 1

[madhan ravi]

You should loop through mn and save the results as a cell array in a variable which is preallocated before loop using indexing. Or better just use logical indexing and store the results as a cell array.