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.
Doubling elements in a vector
04 - Scalar Equations 3
Flip the vector from right to left
Cody Computer Part 1 - Guess the system font used by uipanel
Unique values without using UNIQUE function
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Join Strings with Multiple Different Delimiters
Set the array elements whose value is 13 to 0
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