Cell array indexing question

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Brittany Isbister
Brittany Isbister 2021 年 2 月 20 日
回答済み: Stephen23 2021 年 2 月 22 日
Hi All,
I'm trying to have it so that this will loop thorugh and put all the numbers/ characters in for the different places in the fprintf statement. I have it so it will run the name, but after that it won't run the right thing. Any help would be appreciated!
%% Part A
load('QuizGrades.mat')
student_Names={'Student1','Student2','Student3','Student4','Student5','Student6','Student7','Student8','Student9','Student10','Student11','Student12','Student13','Student14'};
student_IDs=[101:114];
grade_Book={student_Names,student_IDs,grades}
cellplot(grade_Book)
%% Part B
mean(grade_Book{3}(3,:))% mean of the quiz grades for student 3
mean(grade_Book{3}(:,5))% mean of student grades on quiz 5
mean(grade_Book{3}())% mean of grades for all quizzes
%% Part C
[M,I]=min(grade_Book{3},[],2)%minimum grade for each student in one vector and the index for the quiz in another
%% Part D
for x=[1:14]
fprintf('<%s>(%d)will drop grade(%s)from grade(%s)',(grade_Book{1}{:}),(grade_Book{2}(:)),(grade_Book{3}{:}),I)
end
I'm trying to have it to say <student name> (student ID) will drop (grade) from quiz (indexed quiz number)
Thank you for your help in advance!
  2 件のコメント
Brittany Isbister
Brittany Isbister 2021 年 2 月 21 日
Hi Stephen,
The 'QuizGrades.mat' is uploaded for you!

サインインしてコメントする。

採用された回答

Stephen23
Stephen23 2021 年 2 月 22 日
%% Part A
S = load('QuizGrades.mat');
grades = S.grades
grades = 14×7
78 88 56 67 85 96 63 45 98 42 79 55 61 74 56 80 45 83 70 51 44 73 42 90 86 82 55 43 98 91 82 56 94 77 72 98 96 59 81 98 68 87 49 81 97 79 73 61 96 99 86 42 49 48 90 47 98 85 66 47 49 75 74 69 63 63 70 55 73 68
student_Names = "Student"+(1:14)
student_Names = 1×14 string array
"Student1" "Student2" "Student3" "Student4" "Student5" "Student6" "Student7" "Student8" "Student9" "Student10" "Student11" "Student12" "Student13" "Student14"
student_IDs = 101:114;
%% Part B
mean(grades(3,:))% mean of the quiz grades for student 3
ans = 61.2857
mean(grades(:,5))% mean of student grades on quiz 5
ans = 71.2857
mean(grades)% mean of grades for all quizzes
ans = 1×7
75.6429 75.9286 66.8571 70.2143 71.2857 73.5714 64.6429
%% Part C
[M,I] = min(grades,[],2); %minimum grade for each student in one vector and the index for the quiz in another
%% Part D
fmt = '<%s>(%d)will drop grade(%d)from quiz(%d)\n';
for k = 1:14
fprintf(fmt,student_Names(k),student_IDs(k),M(k),I(k))
end
<Student1>(101)will drop grade(56)from quiz(3) <Student2>(102)will drop grade(42)from quiz(3) <Student3>(103)will drop grade(44)from quiz(7) <Student4>(104)will drop grade(42)from quiz(2) <Student5>(105)will drop grade(56)from quiz(4) <Student6>(106)will drop grade(59)from quiz(3) <Student7>(107)will drop grade(49)from quiz(1) <Student8>(108)will drop grade(42)from quiz(3) <Student9>(109)will drop grade(47)from quiz(4) <Student10>(110)will drop grade(55)from quiz(5) <Student11>(111)will drop grade(40)from quiz(7) <Student12>(112)will drop grade(48)from quiz(1) <Student13>(113)will drop grade(49)from quiz(7) <Student14>(114)will drop grade(41)from quiz(2)
Or avoiding the loop:
tmp = [cellstr(student_Names);num2cell([student_IDs(:),M,I]).'];
fprintf(fmt,tmp{:})
<Student1>(101)will drop grade(56)from quiz(3) <Student2>(102)will drop grade(42)from quiz(3) <Student3>(103)will drop grade(44)from quiz(7) <Student4>(104)will drop grade(42)from quiz(2) <Student5>(105)will drop grade(56)from quiz(4) <Student6>(106)will drop grade(59)from quiz(3) <Student7>(107)will drop grade(49)from quiz(1) <Student8>(108)will drop grade(42)from quiz(3) <Student9>(109)will drop grade(47)from quiz(4) <Student10>(110)will drop grade(55)from quiz(5) <Student11>(111)will drop grade(40)from quiz(7) <Student12>(112)will drop grade(48)from quiz(1) <Student13>(113)will drop grade(49)from quiz(7) <Student14>(114)will drop grade(41)from quiz(2)

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