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This question I found in internet please help me to solve this question.

sharad tiwari 님이 질문을 제출함. 21 May 2015
최근 활동 Jan 님이 댓글을 추가함. 7 Jun 2017
Write a function called odd_index that takes a matrix, M, as input argument and returns a matrix that contains only those elements of M that are in odd rows and columns. In other words, it would return the elements of M at indices (1,1), (1,3), (1,5), …, (3,1), (3,3), (3,5), …, etc. Note that both the row and the column of an element must be odd to be included in the output. The following would not be returned: (1,2), (2,1), (2,2) because either the row or the column or both are even. As an example, if M were a 5-by-8 matrix, then the output must be 3-by-4 because the function omits rows 2 and 4 of M and it also omits columns 2, 4, 6, and 8 of M.

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Please make an attempt and post your code. Then we can offer advice and suggestions.

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Thomas Koelen 님의 답변 21 May 2015
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I strongly feel like this is homework.. but:
function M_out = odd_index(M)
M_out = M(1:2:end, 1:2:end);

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It should be 2:2:end, 2:2:end
@soummya roy: ???

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