Using MatLab:

Write a function called DNAcomplement that consumes a set of letters as a character array that forms a DNA sequence such as gattaca. The function will produce the complement of the sequence so that as become ts, gs become cs, and vice versa. The string gattaca would therefore become ctaatgt. You may assume that all the letters in the sequence will be lowercase and that they will all be either a, t, g, or c.