t=table;
t.Num = round(4*rand(814,1));
sum(t.Num==0)
ans = 101
randhalf = (t.Num==0).*rand(size(t.Num))
randhalf = 814×1
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randhalf = randhalf>.5 % change this number for different percentage
randhalf = 814×1 logical array
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t(t.Num==randhalf,:)=[]; % removes for all values in table
sum(t.Num==0)
ans = 54
