Nature-in-code/Mutation.html at master · vivekkrishna/Nature-in-code · GitHub

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<!DOCTYPE html>
<html>
	<head>
	<script>
		var bases=['A','G','C','T'];
		var sequence_len=20;
		var original_sequence=[];
		var sequences=[]; //population
		var num_of_sequences=100;
		var number_of_generations=100;
		var mutation_rate=0.0001;

		function Generate_first_generation(){
			generate_first_sequence();
			for(var i=0;i<num_of_sequences;i++)
			{
				sequences.push(original_sequence.slice());	//this will create and push copies of original sequence into sequencez.
			}
		}

		function generate_first_sequence(){
			for(var i=0;i<sequence_len;i++)
			{
				original_sequence.push(random_base(""));
			}
		}

		function random_base(current_base){
			var new_base;
			do{
				new_base=bases[Math.floor(Math.random()*4)];
			}while(new_base==current_base);
			return new_base;
		}

		function print_sequences(str){
			console.log(str);
			for(var i=0;i<num_of_sequences;i++)
			{
				print_sequence(sequences[i]);
			}
		}

		function print_sequence(sequence){
			var sequence_str='';
			for(var j=0;j<sequence_len;j++)
			{
				sequence_str=sequence_str+sequence[j];
			}
				console.log(sequence_str);
		}

		function run_generations(){
			for(var i=0;i<number_of_generations;i++)
			{
				for(var j=0;j<sequences.length;j++){
					for(var k=0;k<sequences[j].length;k++){
						//each base
						if(Math.random()<mutation_rate){
								sequences[j][k]=random_base(sequences[j][k]);
						}
					}

				}
			}
		}

		Generate_first_generation();

		print_sequences("Generation 0");
		run_generations();
		print_sequences("After 100 generations");

	</script>
	</head>
	<body>
	</body>
</html>