MATLAB: Find the values not existing in this array given below and save it

array operationsgetting values

p1=[8 11 13 6 18 16 10 5 3 4];
p2=[1 7 2 6 16 12 4 10 9 8];
between these two arrays p1 and p2 i wanna get the values not existing between range 1:20 and save in an array [ans] for the above array ans should be [14 15 17 19 20]

Best Answer

p1=[8  11  13  6  18  16  10  5  3  4];
p2=[1  7  2  6  16  12  4  10  9  8]
a=setdiff(1:20,[p1,p2])
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