ML-For-Beginners/translations/el/4-Classification/3-Classifiers-2/solution/notebook.ipynb

{
 "cells": [
  {
   "source": [
    "# Δημιουργία Περισσότερων Μοντέλων Ταξινόμησης\n"
   ],
   "cell_type": "markdown",
   "metadata": {}
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Dataset Overview\n",
    "Αυτό το σύνολο δεδομένων περιέχει μεμονωμένα δείγματα (για παράδειγμα, συνταγές) που έχουν επισημανθεί με την κουζίνα.\n",
    "Κάθε σειρά αντιστοιχεί σε ένα μεμονωμένο δείγμα/εγγραφή, και οι στήλες αντιπροσωπεύουν συστατικά ή άλλα χαρακτηριστικά που χρησιμοποιούνται για την ταξινόμηση, συμπεριλαμβανομένης της ετικέτας `cuisine`.\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "# Load dataset containing cuisine features\n",
    "cuisines_df = pd.read_csv(\"../../data/cleaned_cuisines.csv\")\n",
    "cuisines_df.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "0    indian\n",
       "1    indian\n",
       "2    indian\n",
       "3    indian\n",
       "4    indian\n",
       "Name: cuisine, dtype: object"
      ]
     },
     "metadata": {},
     "execution_count": 2
    }
   ],
   "source": [
    "cuisines_label_df = cuisines_df['cuisine']\n",
    "cuisines_label_df.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "   almond  angelica  anise  anise_seed  apple  apple_brandy  apricot  \\\n",
       "0       0         0      0           0      0             0        0   \n",
       "1       1         0      0           0      0             0        0   \n",
       "2       0         0      0           0      0             0        0   \n",
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       "4       0         0      0           0      0             0        0   \n",
       "\n",
       "   armagnac  artemisia  artichoke  ...  whiskey  white_bread  white_wine  \\\n",
       "0         0          0          0  ...        0            0           0   \n",
       "1         0          0          0  ...        0            0           0   \n",
       "2         0          0          0  ...        0            0           0   \n",
       "3         0          0          0  ...        0            0           0   \n",
       "4         0          0          0  ...        0            0           0   \n",
       "\n",
       "   whole_grain_wheat_flour  wine  wood  yam  yeast  yogurt  zucchini  \n",
       "0                        0     0     0    0      0       0         0  \n",
       "1                        0     0     0    0      0       0         0  \n",
       "2                        0     0     0    0      0       0         0  \n",
       "3                        0     0     0    0      0       0         0  \n",
       "4                        0     0     0    0      0       1         0  \n",
       "\n",
       "[5 rows x 380 columns]"
      ],
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     },
     "metadata": {},
     "execution_count": 3
    }
   ],
   "source": [
    "cuisines_features_df = cuisines_df.drop(['Unnamed: 0', 'cuisine'], axis=1)\n",
    "cuisines_features_df.head()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Δοκιμάστε διαφορετικούς ταξινομητές\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sklearn.neighbors import KNeighborsClassifier\n",
    "from sklearn.linear_model import LogisticRegression\n",
    "from sklearn.svm import SVC\n",
    "from sklearn.ensemble import RandomForestClassifier, AdaBoostClassifier\n",
    "from sklearn.model_selection import train_test_split, cross_val_score\n",
    "from sklearn.metrics import accuracy_score,precision_score,confusion_matrix,classification_report, precision_recall_curve\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "X_train, X_test, y_train, y_test = train_test_split(cuisines_features_df, cuisines_label_df, test_size=0.3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "C = 10\n",
    "# Create different classifiers.\n",
    "classifiers = {\n",
    "    'Linear SVC': SVC(kernel='linear', C=C, probability=True,random_state=0),\n",
    "    'KNN classifier': KNeighborsClassifier(C),\n",
    "    'SVC': SVC(),\n",
    "    'RFST': RandomForestClassifier(n_estimators=100),\n",
    "    'ADA': AdaBoostClassifier(n_estimators=100)\n",
    "    \n",
    "}\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stdout",
     "text": [
      "Accuracy (train) for Linear SVC: 76.4% \n",
      "              precision    recall  f1-score   support\n",
      "\n",
      "     chinese       0.64      0.66      0.65       242\n",
      "      indian       0.91      0.86      0.89       236\n",
      "    japanese       0.72      0.73      0.73       245\n",
      "      korean       0.83      0.75      0.79       234\n",
      "        thai       0.75      0.82      0.78       242\n",
      "\n",
      "    accuracy                           0.76      1199\n",
      "   macro avg       0.77      0.76      0.77      1199\n",
      "weighted avg       0.77      0.76      0.77      1199\n",
      "\n",
      "Accuracy (train) for KNN classifier: 70.7% \n",
      "              precision    recall  f1-score   support\n",
      "\n",
      "     chinese       0.65      0.63      0.64       242\n",
      "      indian       0.84      0.81      0.82       236\n",
      "    japanese       0.60      0.81      0.69       245\n",
      "      korean       0.89      0.53      0.67       234\n",
      "        thai       0.69      0.75      0.72       242\n",
      "\n",
      "    accuracy                           0.71      1199\n",
      "   macro avg       0.73      0.71      0.71      1199\n",
      "weighted avg       0.73      0.71      0.71      1199\n",
      "\n",
      "Accuracy (train) for SVC: 80.1% \n",
      "              precision    recall  f1-score   support\n",
      "\n",
      "     chinese       0.71      0.69      0.70       242\n",
      "      indian       0.92      0.92      0.92       236\n",
      "    japanese       0.77      0.78      0.77       245\n",
      "      korean       0.87      0.77      0.82       234\n",
      "        thai       0.75      0.86      0.80       242\n",
      "\n",
      "    accuracy                           0.80      1199\n",
      "   macro avg       0.80      0.80      0.80      1199\n",
      "weighted avg       0.80      0.80      0.80      1199\n",
      "\n",
      "Accuracy (train) for RFST: 82.8% \n",
      "              precision    recall  f1-score   support\n",
      "\n",
      "     chinese       0.80      0.75      0.77       242\n",
      "      indian       0.90      0.91      0.90       236\n",
      "    japanese       0.82      0.78      0.80       245\n",
      "      korean       0.85      0.82      0.83       234\n",
      "        thai       0.78      0.89      0.83       242\n",
      "\n",
      "    accuracy                           0.83      1199\n",
      "   macro avg       0.83      0.83      0.83      1199\n",
      "weighted avg       0.83      0.83      0.83      1199\n",
      "\n",
      "Accuracy (train) for ADA: 71.1% \n",
      "              precision    recall  f1-score   support\n",
      "\n",
      "     chinese       0.60      0.57      0.58       242\n",
      "      indian       0.87      0.84      0.86       236\n",
      "    japanese       0.71      0.60      0.65       245\n",
      "      korean       0.68      0.78      0.72       234\n",
      "        thai       0.70      0.78      0.74       242\n",
      "\n",
      "    accuracy                           0.71      1199\n",
      "   macro avg       0.71      0.71      0.71      1199\n",
      "weighted avg       0.71      0.71      0.71      1199\n",
      "\n"
     ]
    }
   ],
   "source": [
    "n_classifiers = len(classifiers)\n",
    "\n",
    "for index, (name, classifier) in enumerate(classifiers.items()):\n",
    "    classifier.fit(X_train, np.ravel(y_train))\n",
    "\n",
    "    y_pred = classifier.predict(X_test)\n",
    "    accuracy = accuracy_score(y_test, y_pred)\n",
    "    print(\"Accuracy (train) for %s: %0.1f%% \" % (name, accuracy * 100))\n",
    "    print(classification_report(y_test,y_pred))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "---\n\n<!-- CO-OP TRANSLATOR DISCLAIMER START -->\n**Αποποίηση ευθυνών**:  \nΑυτό το έγγραφο έχει μεταφραστεί χρησιμοποιώντας την υπηρεσία αυτόματης μετάφρασης AI [Co-op Translator](https://github.com/Azure/co-op-translator). Παρόλο που προσπαθούμε για ακρίβεια, παρακαλούμε να γνωρίζετε ότι οι αυτοματοποιημένες μεταφράσεις ενδέχεται να περιέχουν λάθη ή ανακρίβειες. Το πρωτότυπο έγγραφο στη μητρική του γλώσσα θα πρέπει να θεωρείται η αυθεντική πηγή. Για κρίσιμες πληροφορίες, συνιστάται επαγγελματική ανθρώπινη μετάφραση. Δεν φέρουμε ευθύνη για οποιεσδήποτε παρεξηγήσεις ή λανθασμένες ερμηνείες προκύψουν από τη χρήση αυτής της μετάφρασης.\n<!-- CO-OP TRANSLATOR DISCLAIMER END -->\n"
   ]
  }
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