Find sum of elements in a cell along the columns

조회 수: 11(최근 30일)
Hi all,
I have a 3D cell A with dimensions 3x5x2. An example of elements along row 2, all columns and z dimension = 1 is:
x = A(2,:,1)
x = [ ] [ ] 5.1 [ ] 7.9
I would like to add up the non zero entries and get the number of non zero entries in this resulting array. I tried using:
y = sum([A(2,:,1)])
y = cumsum([A(2,:,1)])
But got the following error:
"Error using sum
Invalid data type. First argument must be numeric or logical."
Could anyone please help me with this and would kindly let me know the procedure to solve such problems.
  댓글 수: 1
Fabio Freschi
Fabio Freschi 2019년 9월 9일
Could you please load your data in a mat file?

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채택된 답변

James Tursa
James Tursa 2019년 9월 9일
편집: James Tursa 2019년 9월 9일
Is this what you are trying to do? (using the curly braces)
y = sum([A{2,:,1}])
  댓글 수: 1
Vishakha Ramani
Vishakha Ramani 2019년 9월 9일
Thank you. Can't believe this was that simple. Also, could you please tell me how would you find the number of non-zero entries in such a case?

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추가 답변(1개)

Jacob Shulman
Jacob Shulman 2019년 9월 9일
for i=1:rows
for j=1:columns
if nonzeros(A{i,j,1})
y = sum([A{2,:,1}])
The function nonzeros will not count zeros or blanks.


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