Question

所以我在这里有这个代码，试图加载一个35x5数据集的考试成绩的excel文件，并计算每个学生的平均考试成绩（35名学生，每次5个考试）。然后它应该根据平均分数吐出每个学生所获得的字母等级。

%65    P
%Penna Garrett

%Exam Grades part 2

%Loading the Exam Scores from Excell
grades = xlsread ('Exam_Grades_Data_Part2')
%Don't need to do display because xlsread throws it into command window


%Letter grade earned based on this scale of average test scores:
%0-59 = E
%60-69 = D
%70-75 = C
%76-79 = C+
%80-85 = B
%86-89 = B+
%90-100 = A

%To Calculate the average for all rows I will use a loop function
temp = size(grades)

%Here is my 'for' function
loopend = size(grades,1)

for i=1: loopend
    average(i) = mean(grades(i,1:5));

    if (average(i) <= 59)
        letter{i} = 'E' ;
    elseif (average(i) <= 69)
        letter{i} = 'D' ;
    elseif (average(i) <= 75)
        letter{i} = 'C' ;
    elseif (average(i) <= 79)
        letter{i} = 'C+' ;
    elseif (average(i) <= 85)
        letter{i} = 'B' ;
    elseif (average(i) <= 89)
        letter{i} = 'B+' ;
    elseif (89 < average(i) <= 100)
        letter{i} = 'A' ;
    end
end


display('Hopefully you have recieved the grade you wanted. If not, I may see you next year! Dr. P')
display (letter)

我不能为我的生活弄清楚我得到的错误。它在命令窗口中说：

将单元格内容分配给非单元格数组对象。

S65_Garrett_Penna_07（第42行）中的错误

letter {i} ='A';

Answer 1

你可能有变量＆＃34;字母＆＃34;在工作区中作为非单元格数据类型（如双精度型）。您可能应该将此变量初始化为for循环上方的某个单元格，

letter = {};

无法弄清楚这个MatLab错误告诉我的是什么

1 个答案: