Delete elements in a array

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Mate 2u
Mate 2u 2012-4-21
Hi, I have a large array. I want to delete certain elements in the array. I want to delete the 390th element, and then after that every 391th element......
So need to delete 390, 781, 1182 etc..........

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Wayne King
Wayne King 2012-4-21
So when you say "array", you mean a 1-D vector?
X = randn(49121,1);
indices = 390:391:length(X);
X(indices) = [];
length(X)

更多回答（1 个）

Wayne King
Wayne King 2012-4-21
X = randn(100,100);
% not sure how far you want the vector to go
indices = 390:391:1e4;
X(indices) = [];
Then you'll need to reshape X into an array. Or you can just replace the elements with NaNs
X = randn(100,100);
% not sure how far you want the vector to go
X(indices) = NaN;
  2 个评论
Mate 2u
Mate 2u 2012-4-21
it is 49121 array, and does not seem to be working. So this 49121 array would minus 125 elements and would be just less than 4900 then
Image Analyst
Image Analyst 2012-4-22
Yes. 48996 to be precise, just like it does give you in the 1D version above.

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