MATLAB: Random numbers without repetition of two consecutive numbers

MATLABrandom number generator

Hi everybody, I'm struggling with the randomization of the trials presented in my computerized task. I have to present a sequence of 5 numbers (range from 1 to 4) 100 times. I want that each row of the array contains 5 numbers without repeating two times consecutively the same number. Example :
%Wrong pseudorandom
1 2 2 1 4
3 3 4 1 2
1 4 4 4 2
…
%Right pseudorandom
1 2 3 1 4
2 3 4 1 2
1 4 2 4 3
…
Many thanks for any suggestions,
FM

Best Answer

result1=randperm(4);
result=[result1,result1(randi(3))]
Examples:
result =
     4     1     3     2     1
result =
     2     3     4     1     3
result =
     4     2     1     3     2
result =
     3     2     4     1     2
result =
     3     2     1     4     2
result =
     2     1     3     4     1
result =
     2     3     4     1     3
result =
     2     4     3     1     4
result =
     2     1     3     4     1
result =
     1     3     4     2     3
result =
     2     3     1     4     3
Is it OK?
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