Sub-Function help!

Based on the question it seems "Scores" is a N*3 matrix (N shows number of students). You should write a function that outputs A and B. So your main function will look like

function [A,B] = mystatistic(Scores)
      %Calculation
end

To test your program use the following Score as an example (N=10)

Scores = randi(100,10,3) %let assume the exam is out of 100

Now, try the code yourself and if you have question let us know. We are not going to solve your assignment! ;)

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Jay 2016-3-13

Thank you for your answer. Here what I got and I don't know what I am doing. Please guide me

function [A,B] = mystatistic(Scores)

fid = fopen('TestScoresKim.txt','r'); % open file

headings = fgetl(fid); fgetl(fid); Scores = fscanf(fid,'%f'); Scores = reshape(Scores,[4 20])'; display(Scores);

Test1 = Scores(:,2); Test2 = Scores(:,3); Test3 = Scores(:,4);

A = ((mean(Test1)) * (std(Test3))) B = (median(Test2)) * (mean(Test2))

end

MHN 2016-3-14

在 MATLAB Online 中打开

function [A,B] = mystatistic(Scores)
fid = fopen('TestScoresKim.txt','r'); % open file
headings = fgetl(fid); % read the first line
fgetl(fid); % ignore the second line
Scores = fscanf(fid,'%f'); % read the numbers in the text file
Scores = reshape(Scores,[4 20])'; % put those numbers in a 20*4 matrix
display(Scores);
Test1 = Scores(:,2); %2nd column shows test1
Test2 = Scores(:,3); %3rd column shows test2
Test3 = Scores(:,4); %4th column shows test3
A = ((mean(Test1)) * (std(Test3))) % compute A
B = (median(Test2)) * (mean(Test2)) % compute B
end

But you should also used subfunction, for example you can write the code for mean by yourself (just a loop which sum up the elements of a vector divided by size).

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Sub-Function help!

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