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

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sharad tiwari il 21 Mag 2015
Commentato: Jan il 7 Giu 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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James Tursa il 21 Mag 2015
Please make an attempt and post your code. Then we can offer advice and suggestions.

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### Risposta accettata

Thomas Koelen il 21 Mag 2015
I strongly feel like this is homework.. but:
function M_out = odd_index(M)
M_out = M(1:2:end, 1:2:end);
end
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James Tursa il 17 Mar 2017
Is 2 odd?
Jan il 7 Giu 2017
@soummya roy: ???

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