Shuffling ones in a column

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Tim
Tim 2012-10-11
Hi,
I have a binary matrix, which looks like this:
1 1 1 1 1 1
0 1 1 1 1 1
0 0 1 1 1 1
0 0 1 1 1 1
0 0 0 1 1 1
0 0 0 1 1 1
0 0 0 0 1 1
0 0 0 0 1 1
0 0 0 0 0 1
0 0 0 0 0 1
What should I do when I want to shuffle the fixed amount of ones in one of the columns?
For instance, in an array the shuffling could look like this: 1111000000 --> 0001100101.
I guess this is quite a basic question, but I wasn't able to find the answer anywhere. Thanks in advance!
Cheers, Tim

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采纳的回答

Matt J
Matt J 2012-10-11
If you want things shuffled uniformly/randomly, you could use randperm. Here's an example,
>> E='11110000';
>> E(randperm(8))
ans =
01000111
  2 个评论
Tim
Tim 2012-10-11
Thanks! Works like a charm :)
Syed Imam
Syed Imam 2012-11-8
how to de-randomize the data to get back to original data ?? >> E='11110000'; >> E(randperm(8)) ans = 01000111 (WORKS FINE TO RANDOMIZE THE DATA)
how to de-randomize the randomized data to get the answer '11110000'

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更多回答（1 个）

Syed Imam
Syed Imam 2012-11-8
>> E='11110000'; >> E(randperm(8)) ans = 01000111 (WORKS FINE TO RANDOMIZE THE DATA)
how to de-randomize the randomized data to get the answer '11110000'

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