if statement in for loop with cell arrays

Question

nazlihan okcuer 2019-10-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/488136-if-statement-in-for-loop-with-cell-arrays

编辑： Guillaume 2019-10-30

I have this problem with matlab, I have to assign letter grades to the scores I have, but I couldn't do it. Can anybody help?

s.name={'Seda','Ayça','Deniz','Kerem','Mete'}
s.score={'90','45','68','86','82'}
N=lenght(s.score)
for i = 1:1:N
    if (i)<100 & (i)>=90
       grades(i)='A'
    elseif (i)<90 & (i)>=80
       grades(i) ='B'
    elseif (i)<80 & (i)>=70
       grades ='C'
    elseif (i)<70 & (i)>=60
       grades ='D'
    else 
       grades = 'F'
    end
end

5 个评论
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Fabio Freschi 2019-10-29

Can you have char varaible as values in discretize?

Guillaume 2019-10-30

编辑：Guillaume 2019-10-30

在 MATLAB Online 中打开

Can you have char varaible as values in discretize?

Yes,

>> score = [90, 45, 68, 86, 82];
>> discretize(score, [0 60 70 80 90 100], {'F', 'D', 'C', 'B', 'A'})
ans =
  1×5 cell array
    {'A'}    {'F'}    {'D'}    {'B'}    {'B'}

All discretize does is index the values array with the indices it would normally return. You can have pretty much anything that can be indexed as values.

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Answer 1

Fabio Freschi 2019-10-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/488136-if-statement-in-for-loop-with-cell-arrays#answer_398838

在 MATLAB Online 中打开

To stick with the OP snippet

I added semicolons all over the place
I changed the variable type in s.score to doubles
I preallocated the grades variable as string array
I changed the check on (i) with s.score{i}
I added <= 100 to include also the possibility of 100 score
I changed the single & to double && for logical scalar values

s.name={'Seda','AyÃ§a','Deniz','Kerem','Mete'};
s.score={90,45,68,86,82};
 
N=length(s.score);
 
grades = strings(N,1);
 
for i = 1:1:N
    if s.score{i}<=100 && s.score{i}>=90
       grades(i)='A';
    elseif s.score{i}<90 && s.score{i}>=80
       grades(i) ='B';
    elseif s.score{i}<80 && s.score{i}>=70
       grades(i) ='C';
    elseif s.score{i}<70 && s.score{i}>=60
       grades(i) ='D';
    else 
       grades(i) = 'F';
    end
end