Generating random number from a given sequence.

Question

Aftab Ahmed Khan 2016-7-25

0
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https://ww2.mathworks.cn/matlabcentral/answers/297094-generating-random-number-from-a-given-sequence

回答： Steven Lord 2016-7-25

Hello, I am generating a random sequence of channels one after another based on its availability. The way i'm doing it is like this. It is working fine but i don't like the way i have implemented it. Can you suggest a more efficient method for doing the same thing. Thank you.

                              idle=0;  
                              ava_channelsabs=find(channelstate_abs(idabs,abs_idbeam,:)==idle);
                              col_slot1=[];
                              while length(col_slot1)<length(ava_channelsabs)
                                  rand_slot1=randi(length(ava_channelsabs),1,1);
                                  check=ismember(rand_slot1,col_slot1);
                                  if check==0
                                      rand_channel1=ava_channelsabs(rand_slot1);
                                      col_slot1=[col_slot1,rand_slot1];
                                 end
                              end