目的是為了生成4個隨機不重復的隨機數，存入x(i,:)Xmax=999；Xmin = 1；a = randperm(Xmax-Xmin);x(i,:) = Xmin + a(1:4); 可是報錯：錯誤使用 randpermSize 輸入必須為標量。出錯 main (line 21)a = randperm(Xmax-Xmin);