{ "cells": [ { "cell_type": "markdown", "id": "f4a1399a-f23d-4060-a07e-bce5a5c7ddac", "metadata": { "id": "f4a1399a-f23d-4060-a07e-bce5a5c7ddac" }, "source": [ "# Klasifikasi Teks menggunakan FNN\n", "## Lusiana Situmorang\n" ] }, { "cell_type": "code", "execution_count": 3, "id": "53a214ae-c9cf-4d46-925d-068f1685537b", "metadata": { "id": "53a214ae-c9cf-4d46-925d-068f1685537b" }, "outputs": [], "source": [ "# =========================\n", "# 1. IMPORT LIBRARY\n", "# =========================\n", "import re\n", "import numpy as np\n", "import pandas as pd\n", "\n", "from sklearn.model_selection import train_test_split\n", "from sklearn.feature_extraction.text import TfidfVectorizer\n", "from sklearn.preprocessing import LabelEncoder\n", "from sklearn.metrics import accuracy_score, classification_report\n", "\n", "from tensorflow.keras.models import Sequential\n", "from tensorflow.keras.layers import Dense, Dropout\n", "from tensorflow.keras.utils import to_categorical" ] }, { "cell_type": "code", "source": [ "# =========================\n", "# 2. DATA TEKS MANUAL\n", "# =========================\n", "texts = [\n", " \"saya suka belajar machine learning\",\n", " \"data science sangat menarik\",\n", " \"saya tidak suka matematika\",\n", " \"python mudah dipelajari\",\n", " \"machine learning membutuhkan data\",\n", " \"saya benci debugging error\",\n", " \"belajar python menyenangkan\",\n", " \"matematika penting dalam data science\"\n", "]\n", "\n", "labels = [\n", " \"positif\",\n", " \"positif\",\n", " \"negatif\",\n", " \"positif\",\n", " \"netral\",\n", " \"negatif\",\n", " \"positif\",\n", " \"netral\"\n", "]" ], "metadata": { "id": "YUpHatB8LATR" }, "id": "YUpHatB8LATR", "execution_count": 4, "outputs": [] }, { "cell_type": "code", "execution_count": 5, "id": "9f7d90fe-4af4-446c-9547-c9312bfa6fc7", "metadata": { "id": "9f7d90fe-4af4-446c-9547-c9312bfa6fc7" }, "outputs": [], "source": [ "# =========================\n", "# 3. PREPROCESSING TEKS\n", "# =========================\n", "def clean_text(text):\n", " text = text.lower()\n", " text = re.sub(r\"[^a-z\\s]\", \"\", text)\n", " text = re.sub(r\"\\s+\", \" \", text).strip()\n", " return text\n", "\n", "texts = [clean_text(t) for t in texts]" ] }, { "cell_type": "code", "execution_count": 6, "id": "d4b9a7c2-0f08-43fd-8da8-018d839a4917", "metadata": { "id": "d4b9a7c2-0f08-43fd-8da8-018d839a4917" }, "outputs": [], "source": [ "# =========================\n", "# 4. ENCODING LABEL\n", "# =========================\n", "le = LabelEncoder()\n", "y = le.fit_transform(labels)\n", "y = to_categorical(y)" ] }, { "cell_type": "code", "source": [ "# =========================\n", "# 5. FEATURE EXTRACTION (TF-IDF)\n", "# =========================\n", "vectorizer = TfidfVectorizer(max_features=1000)\n", "X = vectorizer.fit_transform(texts).toarray()" ], "metadata": { "id": "jgBIwoPxLJkw" }, "id": "jgBIwoPxLJkw", "execution_count": 7, "outputs": [] }, { "cell_type": "code", "source": [ "# =========================\n", "# 6. SPLIT DATA\n", "# =========================\n", "X_train, X_test, y_train, y_test = train_test_split(\n", " X, y, test_size=0.25, random_state=42\n", ")" ], "metadata": { "id": "112p_r_WLMEI" }, "id": "112p_r_WLMEI", "execution_count": 8, "outputs": [] }, { "cell_type": "code", "source": [ "# =========================\n", "# 7. MODEL FNN (DIMODIFIKASI)\n", "# =========================\n", "model = Sequential()\n", "model.add(Dense(64, activation=\"relu\", input_shape=(X_train.shape[1],)))\n", "model.add(Dropout(0.3))\n", "model.add(Dense(32, activation=\"relu\"))\n", "model.add(Dense(y.shape[1], activation=\"softmax\"))\n", "\n", "model.compile(\n", " optimizer=\"adam\",\n", " loss=\"categorical_crossentropy\",\n", " metrics=[\"accuracy\"]\n", ")\n", "\n", "model.summary()" ], "metadata": { "colab": { "base_uri": "https://localhost:8080/", "height": 329 }, "id": "WFemRciMLORN", "outputId": "a76a6d80-fce1-4ca7-fcb5-9d6e048b7382" }, "id": "WFemRciMLORN", "execution_count": 9, "outputs": [ { "output_type": "stream", "name": "stderr", "text": [ "/usr/local/lib/python3.12/dist-packages/keras/src/layers/core/dense.py:93: UserWarning: Do not pass an `input_shape`/`input_dim` argument to a layer. When using Sequential models, prefer using an `Input(shape)` object as the first layer in the model instead.\n", " super().__init__(activity_regularizer=activity_regularizer, **kwargs)\n" ] }, { "output_type": "display_data", "data": { "text/plain": [ "\u001b[1mModel: \"sequential\"\u001b[0m\n" ], "text/html": [ "
Model: \"sequential\"\n",
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              "┃ Layer (type)                    ┃ Output Shape           ┃       Param # ┃\n",
              "┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩\n",
              "│ dense (Dense)                   │ (None, 64)             │         1,408 │\n",
              "├─────────────────────────────────┼────────────────────────┼───────────────┤\n",
              "│ dropout (Dropout)               │ (None, 64)             │             0 │\n",
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              "│ dense_1 (Dense)                 │ (None, 32)             │         2,080 │\n",
              "├─────────────────────────────────┼────────────────────────┼───────────────┤\n",
              "│ dense_2 (Dense)                 │ (None, 3)              │            99 │\n",
              "└─────────────────────────────────┴────────────────────────┴───────────────┘\n",
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TRAINING\n", "# =========================\n", "history = model.fit(\n", " X_train,\n", " y_train,\n", " epochs=30,\n", " batch_size=4,\n", " validation_split=0.2,\n", " verbose=1\n", ")" ], "metadata": { "colab": { "base_uri": "https://localhost:8080/" }, "id": "TQH90ZNrLRBt", "outputId": "40144c0a-ecbd-478b-a35c-30a51c755836" }, "id": "TQH90ZNrLRBt", "execution_count": 10, "outputs": [ { "output_type": "stream", "name": "stdout", "text": [ "Epoch 1/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m2s\u001b[0m 2s/step - accuracy: 0.5000 - loss: 1.0428 - val_accuracy: 0.0000e+00 - val_loss: 1.0974\n", "Epoch 2/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 168ms/step - accuracy: 0.2500 - loss: 1.0820 - val_accuracy: 0.0000e+00 - val_loss: 1.1007\n", "Epoch 3/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 239ms/step - accuracy: 0.5000 - loss: 1.0417 - val_accuracy: 0.0000e+00 - val_loss: 1.1046\n", "Epoch 4/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 86ms/step - accuracy: 0.7500 - loss: 1.0252 - val_accuracy: 0.0000e+00 - val_loss: 1.1079\n", "Epoch 5/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 88ms/step - accuracy: 0.5000 - loss: 1.0166 - val_accuracy: 0.0000e+00 - val_loss: 1.1109\n", "Epoch 6/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 132ms/step - accuracy: 0.5000 - loss: 0.9857 - val_accuracy: 0.0000e+00 - val_loss: 1.1139\n", "Epoch 7/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 93ms/step - accuracy: 1.0000 - loss: 0.9839 - val_accuracy: 0.0000e+00 - val_loss: 1.1175\n", "Epoch 8/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 92ms/step - accuracy: 1.0000 - loss: 0.9848 - val_accuracy: 0.0000e+00 - val_loss: 1.1218\n", "Epoch 9/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 87ms/step - accuracy: 1.0000 - loss: 0.9697 - val_accuracy: 0.0000e+00 - val_loss: 1.1260\n", "Epoch 10/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 93ms/step - accuracy: 0.7500 - loss: 0.9688 - val_accuracy: 0.0000e+00 - val_loss: 1.1295\n", "Epoch 11/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 94ms/step - accuracy: 1.0000 - loss: 0.9126 - val_accuracy: 0.0000e+00 - val_loss: 1.1330\n", "Epoch 12/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 87ms/step - accuracy: 0.5000 - loss: 1.0176 - val_accuracy: 0.0000e+00 - val_loss: 1.1366\n", "Epoch 13/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 96ms/step - accuracy: 0.7500 - loss: 0.9968 - val_accuracy: 0.0000e+00 - val_loss: 1.1404\n", "Epoch 14/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 93ms/step - accuracy: 0.7500 - loss: 0.9723 - val_accuracy: 0.0000e+00 - val_loss: 1.1439\n", "Epoch 15/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 91ms/step - accuracy: 0.7500 - loss: 0.9863 - val_accuracy: 0.0000e+00 - val_loss: 1.1474\n", "Epoch 16/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 94ms/step - accuracy: 1.0000 - loss: 0.9335 - val_accuracy: 0.0000e+00 - val_loss: 1.1506\n", "Epoch 17/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 109ms/step - accuracy: 0.7500 - loss: 0.9062 - val_accuracy: 0.0000e+00 - val_loss: 1.1541\n", "Epoch 18/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 99ms/step - accuracy: 0.7500 - loss: 0.9250 - val_accuracy: 0.0000e+00 - val_loss: 1.1575\n", "Epoch 19/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 90ms/step - accuracy: 0.7500 - loss: 0.9448 - val_accuracy: 0.0000e+00 - val_loss: 1.1609\n", "Epoch 20/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 90ms/step - accuracy: 0.7500 - loss: 0.8955 - val_accuracy: 0.0000e+00 - val_loss: 1.1640\n", "Epoch 21/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 92ms/step - accuracy: 1.0000 - loss: 0.8694 - val_accuracy: 0.0000e+00 - val_loss: 1.1667\n", "Epoch 22/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 89ms/step - accuracy: 0.5000 - loss: 0.9652 - val_accuracy: 0.0000e+00 - val_loss: 1.1694\n", "Epoch 23/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 97ms/step - accuracy: 0.7500 - loss: 0.8697 - val_accuracy: 0.0000e+00 - val_loss: 1.1723\n", "Epoch 24/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 89ms/step - accuracy: 0.7500 - loss: 0.8764 - val_accuracy: 0.0000e+00 - val_loss: 1.1758\n", "Epoch 25/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 89ms/step - accuracy: 0.7500 - loss: 0.8423 - val_accuracy: 0.0000e+00 - val_loss: 1.1791\n", "Epoch 26/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 94ms/step - accuracy: 0.7500 - loss: 0.7802 - val_accuracy: 0.0000e+00 - val_loss: 1.1823\n", "Epoch 27/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 109ms/step - accuracy: 0.7500 - loss: 0.8458 - val_accuracy: 0.0000e+00 - val_loss: 1.1854\n", "Epoch 28/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 95ms/step - accuracy: 0.7500 - loss: 0.8357 - val_accuracy: 0.0000e+00 - val_loss: 1.1881\n", "Epoch 29/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 86ms/step - accuracy: 0.7500 - loss: 0.7801 - val_accuracy: 0.0000e+00 - val_loss: 1.1910\n", "Epoch 30/30\n", "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 90ms/step - accuracy: 0.7500 - loss: 0.8469 - val_accuracy: 0.0000e+00 - val_loss: 1.1941\n" ] } ] }, { "cell_type": "code", "source": [ "# =========================\n", "# 9. EVALUASI\n", "# =========================\n", "y_pred = model.predict(X_test)\n", "y_pred_class = np.argmax(y_pred, axis=1)\n", "y_true = np.argmax(y_test, axis=1)\n", "\n", "print(\"\\nAccuracy:\", accuracy_score(y_true, y_pred_class))\n", "print(\"\\nClassification Report:\")\n", "print(classification_report(y_true, y_pred_class, target_names=le.classes_))" ], "metadata": { "colab": { "base_uri": "https://localhost:8080/" }, "id": "KZsJ9UBSLTYe", "outputId": "a1c9f60c-cb11-4ac2-cfe5-b9b541c4444d" }, "id": "KZsJ9UBSLTYe", "execution_count": 11, "outputs": [ { "output_type": "stream", "name": "stdout", "text": [ "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 76ms/step\n", "\n", "Accuracy: 0.0\n", "\n", "Classification Report:\n", " precision recall f1-score support\n", "\n", " negatif 0.00 0.00 0.00 1.0\n", " netral 0.00 0.00 0.00 0.0\n", " positif 0.00 0.00 0.00 1.0\n", "\n", " accuracy 0.00 2.0\n", " macro avg 0.00 0.00 0.00 2.0\n", "weighted avg 0.00 0.00 0.00 2.0\n", "\n" ] }, { "output_type": "stream", "name": "stderr", "text": [ "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Precision is ill-defined and being set to 0.0 in labels with no predicted samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n", "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Recall is ill-defined and being set to 0.0 in labels with no true samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n", "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Precision is ill-defined and being set to 0.0 in labels with no predicted samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n", "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Recall is ill-defined and being set to 0.0 in labels with no true samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n", "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Precision is ill-defined and being set to 0.0 in labels with no predicted samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n", "/usr/local/lib/python3.12/dist-packages/sklearn/metrics/_classification.py:1565: UndefinedMetricWarning: Recall is ill-defined and being set to 0.0 in labels with no true samples. Use `zero_division` parameter to control this behavior.\n", " _warn_prf(average, modifier, f\"{metric.capitalize()} is\", len(result))\n" ] } ] }, { "cell_type": "code", "source": [ "# =========================\n", "# 10. UJI KALIMAT BARU\n", "# =========================\n", "test_text = [\"saya suka belajar python\"]\n", "test_text = [clean_text(test_text[0])]\n", "X_new = vectorizer.transform(test_text).toarray()\n", "\n", "prediction = model.predict(X_new)\n", "predicted_label = le.inverse_transform([np.argmax(prediction)])\n", "\n", "print(\"\\nKalimat uji:\", test_text[0])\n", "print(\"Hasil klasifikasi:\", predicted_label[0])" ], "metadata": { "colab": { "base_uri": "https://localhost:8080/" }, "id": "hfiVQ8rGLWZ-", "outputId": "091f87bc-e9ec-4853-d253-32e5d87f4d95" }, "id": "hfiVQ8rGLWZ-", "execution_count": 12, "outputs": [ { "output_type": "stream", "name": "stdout", "text": [ "\u001b[1m1/1\u001b[0m \u001b[32m━━━━━━━━━━━━━━━━━━━━\u001b[0m\u001b[37m\u001b[0m \u001b[1m0s\u001b[0m 70ms/step\n", "\n", "Kalimat uji: saya suka belajar python\n", "Hasil klasifikasi: netral\n" ] } ] } ], "metadata": { "kernelspec": { "display_name": "Python 3 (ipykernel)", "language": "python", "name": "python3" }, "language_info": { "codemirror_mode": { "name": "ipython", "version": 3 }, "file_extension": ".py", "mimetype": "text/x-python", "name": "python", "nbconvert_exporter": "python", "pygments_lexer": "ipython3", "version": "3.12.2" }, "colab": { "provenance": [] } }, "nbformat": 4, "nbformat_minor": 5 }