Retrieving odd numbers from a matrix

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Kayuri Shah
Kayuri Shah 2015-2-15
编辑： Stephen23 2015-2-15
Within a matrix, I want to be able to retrieve only odd numbers within the matrix, and place that into its own matrix.
What I have right now is:
x = randn(1,100); odd = mod(x, (x/2))
I'm not able to get the new matrix, odd, to print with the odd values from x, even though I divided by 2, in order to return any values with a remainder. I get an error pointing to the second argument of the function mod.
Where am I going wrong with my code?
Thanks for the help!

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回答（2 个）

Andrea Nguyen
Andrea Nguyen 2015-2-15
Instead of doing mod(x, x/2) use mod (x, 2)
This will output the odd numbers rather than just dividing it into two. Hope that helps!
Stephen23
Stephen23 2015-2-15
编辑：Stephen23 2015-2-15
Use MATLAB's great indexing ability:
X = randn(1,100);
Y = X(mod(X,2)==1);

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