Prompt the user to enter three triplets.Loop through the DNA array and record all of the locations of the given triplets (codons)

Write a script file called count_script that will do the following:

⦁ Import the text file sequence_long.txt into MATLAB

⦁ Prompt the user to enter three triplets.

⦁ Loop through the DNA array and record all of the locations of the given triplets (codons).

⦁ From Matlab, create a text file called report_count.txt and add to this file:

⦁ The total number of first codons found and first 10 locations (offsets) for the first codon.

⦁ The total number of second codons found and first 10 locations (offsets) for the second codon.

⦁ The total number of third codons found and first 10 locations (offsets) for the third codon.

So basically my question is how do I make a loop so it can look through the text file that contains DNA codons and make it identify the location of the codons the user inputs.

This is how far I got:

clc

longsequence=fopen('sequence_long.txt');

triplets=input('Enter three triplets :','s');

%triplets will be a set of three codons

and this is my other attempt:

filename='sequence_long.txt';

longsequence=importdata('sequence_long.txt');

sequence_long=longsequence.data;

triplets=input('Enter three triplets');

%triplets will be a set of three codons

but I don't know how to start the loop for the array file