DataLoader.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using UnityEngine;

public class DataLoader : MonoBehaviour {

	// Filename (make sure it is in a folder called "Resources" so Unity includes it in the build)
	public string filename = "test.csv";

	// The is a simple list of each number
	private List<int> values = new List<int>();

	// As soon as it is added to the scene, load the data
	public void Awake () {

		// Load our values and save them to this
		values = LoadValuesFromCSV( filename );

	}

	public void Update () {

		// Get the current frame number and loop around the number of frames we have
		var frameNumber = (Time.frameCount - 1) % GetNumberOfCompleteFramesIn( values );

		// Privnt out the value of the first element
		Debug.Log( frameNumber + ": " + GetValueFrom( values, frameNumber, 0 ) );
	}

	// I've made this method static, be passed the file name and return the 
	// result so it's not tied to this class
	public static List<int> LoadValuesFromCSV ( string filename ) {

		// Load up string a s a TextAsset
		TextAsset csvTxt = Resources.Load( filename ) as TextAsset;

		string textWithoutWithSpaces = Regex.Replace( csvTxt.text, @"\s+", "" );

		// Create a list of string
		List<string> valueListAsString = new List<string>( textWithoutWithSpaces.Split( ',' ) );

		// Convert the the 
		return valueListAsString
			// Strip out empty values
			.Where( valueAsString => valueAsString != "" )
			.ToList()
			// Convert this List<string> to List<int>
			.ConvertAll<int>( valueAsString => {
				int valueAsInt = -1;
				try {
					valueAsInt = int.Parse( valueAsString );
				} catch ( Exception e ) {
					Debug.LogError( "Couldn't convert: '" + valueAsString + "'" );
					Debug.LogError( e );
				}
				return valueAsInt;
			});

	}

	// Sees how many frames are in list of values
	public static int GetNumberOfCompleteFramesIn ( List<int> values, int rowsPerFrame = 181 ) {
		return values.Count / rowsPerFrame;
	}

	// Returns -1 if the value is out of range
	public static int GetValueFrom ( List<int> values, int frame, int row, int rowsPerFrame = 181 ) {

		// Frame count to low
		if ( frame < 0 ) {
			return -1;
		}

		// Get the position in the value array
		int index = (frame * rowsPerFrame) + row;

		// See if we are out of range
		if ( index >= values.Count ) {
			return  -1;
		}

		return values[ index ];
	}

}