help I have 40 iteration , 10 iteration of 40 at random to do something and the other 30 iteration for do another thing??

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maha ismail 2015-1-19

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评论： Star Strider 2015-1-19

help I have 40 iteration , 10 iteration of 40 at random to do something and the other 30 iteration for do another thing?? for t=1:40 take 10 of 40 at random to do something and other 30 for do another thing

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Answer 1

Star Strider 2015-1-19

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If you want to choose 10 iterations randomly out of a total of 40, this is one way:

ran10 = randperm(40, 10);               % Choose 10 Random Iterations From 40
for k1 = 1:40
    if any(ran10 == k1)
        fprintf('\n\tDo something randomly at k1 = %d\n', k1)
    else
        fprintf('\n\tDo something else at k1 = %d\n', k1)
    end
end

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maha ismail 2015-1-19

this is what I need but rewrite this code in a simple code because I work In matlab version 6.5 year2000

Star Strider 2015-1-19

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I don’t know what 6.5 had, but I assume the problem is with randperm.

This restatement of ran10 should work:

ran10 = fix(40*rand(10,1));

(If this solves your problem, please Accept my Answer.)

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Answer 2

Marcel 2015-1-19

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Don't quite understand the question. Can't you just create 2 loops?

For i=1:30
  <stuff happens>
end
For i=31:40
  <other stuff happens>
end

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maha ismail 2015-1-19

I mean the I is not in sequence 10 iteration but not in order may 1 6 8 11 30 25 13 7 5 22 this 10 iteration in random but the other 30 its the other numbers don't selected in the 10 iteration