Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 27 Aug 2017 My Price 11.00

DNA strand

Problem 1

 

A DNA strand is represented by a string of the characters A, C, G, and T, each of which represents a nucleotide. The hamming distance between two DNA strands of the same length is equal to the number of positions in which they differ. Hamming distance is used in bioinformatics as a measure of the similarity of two strings. Write a DNA class that gets initialized with a string of nucleotide characters. An instance of DNA responds to the to_s, length,and hamming_distance messages. Where a and b are DNA instances of the same length, the message send a.hamming_distance(b) returns the hamming distance between a and b:

=> true

>> dna1 = DNA.new('ATTGCC')

=> ATTGCC

>> dna1.length

=> 6

>> puts dna1

ATTGCC

>> dna2 = DNA.new('GTTGAC')

=> GTTGAC

>> dna1.hamming_distance(dna2) => 2

>> dna1.hamming_distance(dna1)

=> 0

>> dna1.hamming_distance(DNA.new('AT')) ArgumentError: dnas of different lengths from ass2.rb:17:in `hamming_distance' from (irb):8

from C:/Ruby22/bin/irb:11:in ''

Answers

Maurice Tutor
(5)
Status NEW Posted 27 Aug 2017 09:08 AM My Price 11.00

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