Error in solution: Line: 6 Column: 5 Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

function X = rescale_scores(X)
Y = X(:,end)
[m,n] = size(X)
a = 1
B = []
for 1:m
   if 60=< Y(a) < 70
        B = [B;rescale(Y(a),0,1)]
        a = a+1
   elseif 70 =< Y(a) < 80
          B = [B;rescale(Y(a),1,2)]
          a = a+1
   elseif 80 =< Y(a) < 90
          B = [B;rescale(Y(a),2,3)]
          a = a+1
   elseif 90 =< Y(a) < 100
          B = [B;rescale(Y(a),3,4)]
          a = a+1
   end 
end
X = [X(:,end-1),B]
end

[Ive J]

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

Answer 1

[Cris LaPierre]

You must create a variable for your loop counter in your for loop. Look at some of the examples here.

For loop syntax is also covered in Ch 13 of MATLAB Onramp.