perhaps you should specify that y is in the order of the first occurence of each unique element of x
This would be a better problem if unique and sort functions were not allowed
Solution without using sort(.) or unique(.) .
Solution without using sort(_) or unique(_) .
Note 1) this solution does not use sort() anywhere :) 2) the more elegant "stable" is not available for unique in pre-2012 MATLAB.
Find the two most distant points
Remove the polynomials that have positive real elements of their roots.
Column norms of a matrix
Arrange vector in ascending order
Remove the two elements next to NaN value
Convert a structure into a string
Set the array elements whose value is 13 to 0
Combinations without using nchoosek
Set some matrix elements to zero
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