Outputting numbers not selected in using "randperm" command

2020 3 15
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I have a row which contains 93 numbers ranging from 1 to 116. The numbers in the rows are randomly selected using "randperm" command. Now, I want to output the numbers that are not selected. How do we do that?

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Walter Roberson
Walter Roberson 2020-3-15

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Select_How_Many = 42;
Num_in_Row = length(row);
selection_index = randperm(Num_in_Row, Select_How_Many);
unselection_index = setdiff(1:Num_in_Row, selection_index);
selected_values = row(selection_index);
unselected_values = row(unselection_index);

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