[3 1 5 7 0] and [3 2 5 7 0] is similar or not?
'Rows are considered similar if the numbers common to both rows are in the exact same order with no other numbers in between'. Numbers in common are 3, 5, 7. They're in the exact same order. But there is a number in between in both rows, so they're not similar.
Basically, find the numbers that are common to both rows. If they're consecutive in both, with no gaps, keep the row
Maybe a better description for the problem would be that the largest sequence of equal numbers between two rows must have the same size and be unique.
I've added a test to prevent this from working
Set some matrix elements to zero
Test if two numbers have the same digits
Generate a NaN...on purpose
compress sequence into intervals
Find Elements in Range
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