"Using MATLAB Write a function that Calculates the overall sum of the elements in each row of a Matrix and also shows on the screen (Not: prints the sum of only the positive numbers from each row)" How can I apply the note to the code?

Question

Quietuss Yuroka 2021-1-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/709353-using-matlab-write-a-function-that-calculates-the-overall-sum-of-the-elements-in-each-row-of-a-matr

评论： Stephen23 2021-1-5

I have a question like "Using MATLAB Write a function that Calculates the overall sum of the elements in each row of a Matrix and also shows on the screen (Not: prints the sum of only the positive numbers from each row)" and I wrote the code but I did not understand how to apply note to the code.

row = input('Enter number of rows: ');
col = input('Enter number of columns: ');
A = zeros(row+1,col+1);
for i = 1:row
  for j = 1:col
    str = ['Enter element in row ' num2str(i) ', col ' num2str(j) ': '];
    A(i,j) = input(str);
  end
end
fprintf('
A;
A(end,1:col) = sum(A(1:row,1:col),1);
A(1:row,end) = sum(A(1:row,1:col),2);

2 个评论
显示无隐藏无

Rik 2021-1-5

This time I edited your question for you. Next time, please use the tools explained on this page to make your question more readable. You should also probably fix the syntax errors.

Stephen23 2021-1-5

http://web.archive.org/web/20210105195932/https://www.mathworks.com/matlabcentral/answers/709353-using-matlab-write-a-function-that-calculates-the-overall-sum-of-the-elements-in-each-row-of-a-matr

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Daniel Catton 2021-1-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/709353-using-matlab-write-a-function-that-calculates-the-overall-sum-of-the-elements-in-each-row-of-a-matr#answer_591313

在 MATLAB Online 中打开

This is my understanding of the question:

A = rand(15,13); %Can set to whatever matrix you wish
[row,col] = size(A); %Counts how many rows and cols in the matrix
b = 0;
B = zeros(row,1); %Preallocates B for speed (probably not necessary in this case but good practice to do so)
for i = 1:row
    for j = 1:col
        a = A(i,j); %Goes through each element in the row
        if a > 0
            b = b+a; %If a is positive then it is added to b
        end
    end
    B(i,1) = b; %b is displayed in the matrix B
    b = 0;
end

4 个评论
显示 2更早的评论隐藏 2更早的评论

Rik 2021-1-5

@Daniel, please refrain from giving complete solutions to homework problems. That only encourages cheating and means that you will be asked to do their homework next time as well.

Quietuss Yuroka 2021-1-5