{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "id": "JVPdWpz3hhbj"
   },
   "source": [
    "\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "id": "4Mvva3v65h1v"
   },
   "source": [
    "# **UNIGRAM**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "colab": {
     "base_uri": "https://localhost:8080/"
    },
    "id": "1cub_VJnUJMl",
    "outputId": "1889eb61-4f3f-4780-f42e-02368076cce3"
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Corpus: saya suka makan nasi\n",
      "Tokens (4): ['saya', 'suka', 'makan', 'nasi']\n",
      "\n",
      "Frekuensi Unigram dalam kalimat\n",
      " ('saya'): 1\n",
      " ('suka'): 1\n",
      " ('makan'): 1\n",
      " ('nasi'): 1\n",
      "\n",
      "Total unigram dalam 1 kalimat: 4\n",
      "\n",
      "Probabilitas masing-masing unigram:\n",
      " P(saya) = 0.25 (25.00%)\n",
      " P(suka) = 0.25 (25.00%)\n",
      " P(makan) = 0.25 (25.00%)\n",
      " P(nasi) = 0.25 (25.00%)\n",
      "\n",
      "Probabilitas Keseluruhan Kalimat (Model Unigram):\n",
      " P(saya suka makan nasi) = P(saya)=0.25 x P(suka)=0.25 x P(makan)=0.25 x P(nasi)=0.25 = 0.0039 (0.39%)\n"
     ]
    }
   ],
   "source": [
    "from collections import Counter\n",
    "from IPython.display import clear_output\n",
    "import math\n",
    "\n",
    "# 1. Input Kalimat dan Tokenisasi\n",
    "kalimat = input(\"Masukkan kalimat: \").strip()\n",
    "\n",
    "# Bersihkan output (khusus lingkungan notebook)\n",
    "try:\n",
    "    clear_output()\n",
    "except:\n",
    "    pass\n",
    "\n",
    "print(f\"Corpus: {kalimat}\")\n",
    "\n",
    "# Tokenize\n",
    "tokens = kalimat.lower().split()\n",
    "print(f\"Tokens ({len(tokens)}): {tokens}\")\n",
    "\n",
    "# 2. Hitung Frekuensi Unigram\n",
    "unigram_counts = Counter(tokens)\n",
    "total_tokens = sum(unigram_counts.values())\n",
    "\n",
    "print(\"\\nFrekuensi Unigram dalam kalimat\")\n",
    "for pair, count in unigram_counts.items():\n",
    "    print(f\" ('{pair}'): {count}\")\n",
    "print(f\"\\nTotal unigram dalam 1 kalimat: {total_tokens}\")\n",
    "\n",
    "# 3. Hitung Probabilitas Unigram: P(wi) = Count(wi) / Total Kata\n",
    "unigram_probabilities = {}\n",
    "for word, count in unigram_counts.items():\n",
    "    prob = count / total_tokens\n",
    "    unigram_probabilities[word] = prob\n",
    "\n",
    "print(\"\\nProbabilitas masing-masing unigram:\")\n",
    "for word, prob in unigram_probabilities.items():\n",
    "    print(f\" P({word}) = {prob:.2f} ({prob*100:.2f}%)\")\n",
    "\n",
    "# 4. Hitung Probabilitas Kalimat Keseluruhan (P(kalimat) = P(w1) * P(w2) * ...)\n",
    "p_kalimat = 1\n",
    "prob_parts = []\n",
    "\n",
    "# Loop untuk menghitung probabilitas total dan membangun string rumus detail\n",
    "for word in tokens:\n",
    "    prob_value = unigram_probabilities[word]\n",
    "    p_kalimat *= prob_value\n",
    "    # Format: P(word)=prob_value\n",
    "    prob_parts.append(f\"P({word})={prob_value:.2f}\")\n",
    "\n",
    "# Gabungkan bagian-bagian rumus untuk mendapatkan prob_str detail\n",
    "prob_str = \" x \".join(prob_parts)\n",
    "\n",
    "print(\"\\nProbabilitas Keseluruhan Kalimat (Model Unigram):\")\n",
    "print(f\" P({' '.join(tokens)}) = {prob_str} = {p_kalimat:.4f} ({p_kalimat*100:.2f}%)\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "id": "Vstwt996-FrS"
   },
   "source": [
    "# **BIGRAM**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "colab": {
     "base_uri": "https://localhost:8080/"
    },
    "id": "XRIY4qgTVbjl",
    "outputId": "ea6e62ce-45a0-40c9-ca98-1fcc30558479"
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Corpus: saya makan nasi dan saya makan roti\n",
      "Tokens (7): ['saya', 'makan', 'nasi', 'dan', 'saya', 'makan', 'roti']\n",
      "\n",
      "Frekuensi Bigram dalam kalimat:\n",
      " ('saya', 'makan'): 2\n",
      " ('makan', 'nasi'): 1\n",
      " ('nasi', 'dan'): 1\n",
      " ('dan', 'saya'): 1\n",
      " ('makan', 'roti'): 1\n",
      "\n",
      "Total bigram dalam 1 kalimat: 6\n",
      "\n",
      "Probabilitas masing-masing bigram:\n",
      " P(makan|saya) = 1.00 (100.00%)\n",
      " P(nasi|makan) = 0.50 (50.00%)\n",
      " P(dan|nasi) = 1.00 (100.00%)\n",
      " P(saya|dan) = 1.00 (100.00%)\n",
      " P(roti|makan) = 0.50 (50.00%)\n",
      "\n",
      "Probabilitas Keseluruhan Kalimat (Model Bigram):\n",
      " P(saya makan nasi dan saya makan roti) = P(saya)=0.29 x P(makan|saya)=1.00 x P(nasi|makan)=0.50 x P(dan|nasi)=1.00 x P(saya|dan)=1.00 x P(makan|saya)=1.00 x P(roti|makan)=0.50 = 0.071429 (7.14%)\n"
     ]
    }
   ],
   "source": [
    "from collections import Counter\n",
    "from IPython.display import clear_output\n",
    "import math\n",
    "\n",
    "# 1. Input Kalimat dan Tokenisasi\n",
    "kalimat = input(\"Masukkan kalimat: \").strip()\n",
    "\n",
    "# Bersihkan output (khusus lingkungan notebook)\n",
    "try:\n",
    "    clear_output()\n",
    "except:\n",
    "    pass\n",
    "\n",
    "print(f\"Corpus: {kalimat}\")\n",
    "\n",
    "# Tokenisasi\n",
    "tokens = kalimat.lower().split()\n",
    "print(f\"Tokens ({len(tokens)}): {tokens}\")\n",
    "\n",
    "# 2. Hitung Frekuensi Unigram dan Bigram\n",
    "unigram_counts = Counter(tokens)\n",
    "bigrams = [(tokens[i], tokens[i+1]) for i in range(len(tokens) - 1)]\n",
    "bigram_counts = Counter(bigrams)\n",
    "\n",
    "print(\"\\nFrekuensi Bigram dalam kalimat:\")\n",
    "for pair, count in bigram_counts.items():\n",
    "    print(f\" {pair}: {count}\")\n",
    "print(f\"\\nTotal bigram dalam 1 kalimat: {sum(bigram_counts.values())}\")\n",
    "\n",
    "# 3. Hitung Probabilitas Bigram: P(w2 | w1) = Count(w1,w2) / Count(w1)\n",
    "bigram_probabilities = {}\n",
    "for (w1, w2), count in bigram_counts.items():\n",
    "    prob = count / unigram_counts[w1]\n",
    "    bigram_probabilities[(w1, w2)] = prob\n",
    "\n",
    "print(\"\\nProbabilitas masing-masing bigram:\")\n",
    "for (w1, w2), prob in bigram_probabilities.items():\n",
    "    print(f\" P({w2}|{w1}) = {prob:.2f} ({prob*100:.2f}%)\")\n",
    "\n",
    "# 4. Hitung Probabilitas Kalimat Keseluruhan (Model Bigram)\n",
    "#    P(kalimat) = P(w1) * P(w2|w1) * P(w3|w2) * ...\n",
    "total_tokens = sum(unigram_counts.values())\n",
    "p_w1 = unigram_counts.get(tokens[0], 0) / total_tokens # P(w1)\n",
    "p_kalimat = p_w1 # Inisialisasi dengan P(w1)\n",
    "\n",
    "prob_str_parts = [f\"P({tokens[0]})={p_w1:.2f}\"] # Tambahkan P(w1) ke rumus\n",
    "\n",
    "for i in range(1, len(tokens)):\n",
    "    pair = (tokens[i-1], tokens[i])\n",
    "    p = bigram_probabilities.get(pair, 0)\n",
    "    p_kalimat *= p\n",
    "    prob_str_parts.append(f\"P({pair[1]}|{pair[0]})={p:.2f}\")\n",
    "\n",
    "# Gabungkan rumus perkalian untuk ditampilkan\n",
    "prob_str = \" x \".join(prob_str_parts)\n",
    "\n",
    "print(\"\\nProbabilitas Keseluruhan Kalimat (Model Bigram):\")\n",
    "print(f\" P({' '.join(tokens)}) = {prob_str} = {p_kalimat:.6f} ({p_kalimat*100:.2f}%)\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "id": "E6n1IU8X-G9S"
   },
   "source": [
    "# **TRIGRAM**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "colab": {
     "base_uri": "https://localhost:8080/"
    },
    "id": "BIRARsj2FHJg",
    "outputId": "968d420e-9370-40e5-e7e1-148e1d351d62"
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Corpus: mahasiswa mengerjakan tugas kemudian mahasiswa upload e-learning\n",
      "Tokens (7): ['mahasiswa', 'mengerjakan', 'tugas', 'kemudian', 'mahasiswa', 'upload', 'e-learning']\n",
      "\n",
      "Frekuensi Trigram dalam kalimat:\n",
      " ('mahasiswa', 'mengerjakan', 'tugas'): 1\n",
      " ('mengerjakan', 'tugas', 'kemudian'): 1\n",
      " ('tugas', 'kemudian', 'mahasiswa'): 1\n",
      " ('kemudian', 'mahasiswa', 'upload'): 1\n",
      " ('mahasiswa', 'upload', 'e-learning'): 1\n",
      "\n",
      "Total trigram dalam 1 kalimat: 5\n",
      "\n",
      "Probabilitas masing-masing trigram:\n",
      " P(tugas|mahasiswa,mengerjakan) = 1.00 (100.00%)\n",
      " P(kemudian|mengerjakan,tugas) = 1.00 (100.00%)\n",
      " P(mahasiswa|tugas,kemudian) = 1.00 (100.00%)\n",
      " P(upload|kemudian,mahasiswa) = 1.00 (100.00%)\n",
      " P(e-learning|mahasiswa,upload) = 1.00 (100.00%)\n",
      "\n",
      "Probabilitas Keseluruhan Kalimat (Model Trigram):\n",
      " P(mahasiswa mengerjakan tugas kemudian mahasiswa upload e-learning) = P(mahasiswa)=0.29 x P(mengerjakan|mahasiswa)=0.50 x P(tugas|mahasiswa,mengerjakan)=1.00 x P(kemudian|mengerjakan,tugas)=1.00 x P(mahasiswa|tugas,kemudian)=1.00 x P(upload|kemudian,mahasiswa)=1.00 x P(e-learning|mahasiswa,upload)=1.00 = 0.142857 (14.29%)\n"
     ]
    }
   ],
   "source": [
    "from collections import Counter\n",
    "from IPython.display import clear_output\n",
    "import math\n",
    "\n",
    "# 1. Input Kalimat dan Tokenisasi\n",
    "kalimat = input(\"Masukkan kalimat: \").strip()\n",
    "\n",
    "# Bersihkan output (khusus lingkungan notebook)\n",
    "try:\n",
    "    clear_output()\n",
    "except:\n",
    "    pass\n",
    "\n",
    "print(f\"Corpus: {kalimat}\")\n",
    "\n",
    "# Tokenisasi\n",
    "tokens = kalimat.lower().split()\n",
    "print(f\"Tokens ({len(tokens)}): {tokens}\")\n",
    "\n",
    "# 2. Hitung Frekuensi Bigram dan Trigram\n",
    "bigrams = [(tokens[i], tokens[i+1]) for i in range(len(tokens) - 1)]\n",
    "trigrams = [(tokens[i], tokens[i+1], tokens[i+2]) for i in range(len(tokens) - 2)]\n",
    "\n",
    "bigram_counts = Counter(bigrams)\n",
    "trigram_counts = Counter(trigrams)\n",
    "\n",
    "print(\"\\nFrekuensi Trigram dalam kalimat:\")\n",
    "for tg, count in trigram_counts.items():\n",
    "    print(f\" {tg}: {count}\")\n",
    "print(f\"\\nTotal trigram dalam 1 kalimat: {sum(trigram_counts.values())}\")\n",
    "\n",
    "# 3. Hitung Probabilitas Trigram: P(w3 | w1, w2) = Count(w1,w2,w3) / Count(w1,w2)\n",
    "trigram_probabilities = {}\n",
    "for (w1, w2, w3), count in trigram_counts.items():\n",
    "    # Hindari pembagian dengan nol (jika ada bigram yang tidak muncul)\n",
    "    if bigram_counts[(w1, w2)] > 0:\n",
    "        prob = count / bigram_counts[(w1, w2)]\n",
    "    else:\n",
    "        prob = 0\n",
    "    trigram_probabilities[(w1, w2, w3)] = prob\n",
    "\n",
    "print(\"\\nProbabilitas masing-masing trigram:\")\n",
    "for (w1, w2, w3), prob in trigram_probabilities.items():\n",
    "    print(f\" P({w3}|{w1},{w2}) = {prob:.2f} ({prob*100:.2f}%)\")\n",
    "\n",
    "# Tambahkan perhitungan Unigram Count (dibutuhkan untuk P(w1) dan P(w2|w1))\n",
    "unigram_counts = Counter(tokens)\n",
    "total_tokens = sum(unigram_counts.values())\n",
    "\n",
    "# 4. Hitung Probabilitas Kalimat Keseluruhan (Model Trigram)\n",
    "#    P(kalimat) = P(w1) * P(w2|w1) * P(w3|w1,w2) * ...\n",
    "\n",
    "# a. P(w1)\n",
    "p_w1 = unigram_counts.get(tokens[0], 0) / total_tokens if total_tokens > 0 else 0\n",
    "\n",
    "# b. P(w2|w1) (Menggunakan Bigram tanpa smoothing)\n",
    "if len(tokens) > 1:\n",
    "    count_w1 = unigram_counts.get(tokens[0], 1) # Hindari pembagian dengan 0\n",
    "    p_w2_w1 = bigram_counts.get((tokens[0], tokens[1]), 0) / count_w1\n",
    "else:\n",
    "    p_w2_w1 = 1.0 # Jika hanya 1 kata\n",
    "\n",
    "p_kalimat = p_w1 * p_w2_w1 # Inisialisasi dengan P(w1) * P(w2|w1)\n",
    "\n",
    "# Daftar bagian rumus untuk ditampilkan\n",
    "prob_str_parts = [f\"P({tokens[0]})={p_w1:.2f}\"]\n",
    "if len(tokens) > 1:\n",
    "    prob_str_parts.append(f\"P({tokens[1]}|{tokens[0]})={p_w2_w1:.2f}\")\n",
    "\n",
    "# c. Perkalian Trigram P(wi | wi-2, wi-1) untuk i >= 3\n",
    "for i in range(len(tokens) - 2):\n",
    "    triplet = (tokens[i], tokens[i+1], tokens[i+2])\n",
    "    p = trigram_probabilities.get(triplet, 0)\n",
    "    p_kalimat *= p\n",
    "    prob_str_parts.append(f\"P({triplet[2]}|{triplet[0]},{triplet[1]})={p:.2f}\")\n",
    "\n",
    "prob_str = \" x \".join(prob_str_parts)\n",
    "\n",
    "print(\"\\nProbabilitas Keseluruhan Kalimat (Model Trigram):\")\n",
    "print(f\" P({' '.join(tokens)}) = {prob_str} = {p_kalimat:.6f} ({p_kalimat*100:.2f}%)\")\n"
   ]
  }
 ],
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