Please help me to overcome the error of the following code

Question

Prabha Kumaresan 2017-12-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373998-please-help-me-to-overcome-the-error-of-the-following-code

关闭： MATLAB Answer Bot 2021-8-20

A = diag([1 2 3 4 5 6 7 8 9]);
N_G=3;%No of group
B = cell(N_G,1);
sumB = cell(N_G,1);
for i=1:1:N_G
    n=randi([2 6],1)% select No of UE randomly 
    idx=randsample(1:size(A,1),n)
    B{i} = A(idx,:)
      [rows, columns] = size(B{i});
      % Get sum of columns and replicate vertically.
      sumB{i} = repmat(sum(B{i}, 1), [rows, 1])
  end
These are the errors which comes while running the code.Please help me to overcome it.
>> B{i} = A(idx,:)
The right hand side of this assignment has too few values to satisfy
the left hand side.
>> [rows, columns] = size(B{i})
Error using size
Too many output arguments.
>> sumB{i} = repmat(sum(B{i}, 1), [rows, 1])
Error using sum
Trailing string input must be 'double', 'native', 'default',
'omitnan' or 'includenan'.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

此问题已关闭。

Answer 1

Star Strider 2017-12-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373998-please-help-me-to-overcome-the-error-of-the-following-code#answer_297241

在 MATLAB Online 中打开

Your posted code runs for me without error.

This problem:

>> [rows, columns] = size(B{i})
Error using size
Too many output arguments.

is most likely caused by your having a variable named ‘size’ somewhere earlier in your code. You can confirm this with:

which size -all

If the first line of the output is:

size is a variable.

You have found the problem.

The second error most likely results from ‘rows’ not existing. However execution should have stopped with the first error and not thrown the second, and since your code runs for me without error, I have no idea what the problem could be with your sum call.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

Answer 2

Image Analyst 2017-12-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373998-please-help-me-to-overcome-the-error-of-the-following-code#answer_297242

在 MATLAB Online 中打开

I don't know what it does, but your code runs fine for me -- no errors at all:

A = diag([1 2 3 4 5 6 7 8 9]);
N_G=3;%No of group
B = cell(N_G,1);
sumB = cell(N_G,1);
for i=1:1:N_G
  n=randi([2 6],1)% select No of UE randomly
  idx=randsample(1:size(A,1),n)
  B{i} = A(idx,:)
  
  [rows, columns] = size(B{i});
  % Get sum of columns and replicate vertically.
  sumB{i} = repmat(sum(B{i}, 1), [rows, 1])
end
B{i} = A(idx,:)
[rows, columns] = size(B{i})
sumB{i} = repmat(sum(B{i}, 1), [rows, 1])

2 个评论
显示无隐藏无

Prabha Kumaresan 2017-12-21

it executes.the intention of this code is to group users. but after the code executes the number of users in the group is not same as the original number of users.