Given a vector, find the average of even-numbered columns.
x = [ 4 6 8 9 1 2 7 ]
y = ( 6 + 9 + 2 ) / 3
Times 2 - START HERE
Make a run-length companion vector
Insert zeros into vector
Area of a circle
Calculate feeling temperature before climbing a mountain
Probability of red tulips
Delete the column with all 0 !
Probability of red tulips (at both ends of a row)
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