Shuffling ones in a column

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

Answer 1

[Matt J]

If you want things shuffled uniformly/randomly, you could use randperm. Here's an example,

>> E='11110000';
>> E(randperm(8))

ans =

01000111

[Tim]

Thanks! Works like a charm :)

[Syed Imam]

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'

Answer 2

[Syed Imam]

>> 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'

[Matt J]

You cannot.