public static float[] returnArray(String arrayString){
        Log.d("tag", arrayString);
        int i = 0;
        float[] histogram = new float[256];
        Scanner s = new Scanner(arrayString);
        s.useLocale(Locale.US);
        while (s.hasNext()) {
            s.next();
            if (s.hasNextFloat()) {
                histogram[i] = s.nextFloat();
                i++;
            }
        }
        return histogram;
    }