"execution_count":null,

"cell_type":"code",

"source": [

"print(__doc__)\n\nimport itertools\nimport numpy as np\nimport matplotlib.pyplot as plt\n\nfrom sklearn import svm, datasets\nfrom sklearn.model_selection import train_test_split\nfrom sklearn.metrics import confusion_matrix\n\n# import some data to play with\niris = datasets.load_iris()\nX = iris.data\ny = iris.target\nclass_names = iris.target_names\n\n# Split the data into a training set and a test set\nX_train, X_test, y_train, y_test = train_test_split(X, y, random_state=0)\n\n# Run classifier, using a model that is too regularized (C too low) to see\n# the impact on the results\nclassifier = svm.SVC(kernel='linear', C=0.01)\ny_pred = classifier.fit(X_train, y_train).predict(X_test)\n\n\ndef plot_confusion_matrix(cm, classes,\n normalize=False,\n title='Confusion matrix',\n cmap=plt.cm.Blues):\n \"\"\"\n This function prints and plots the confusion matrix.\n Normalization can be applied by setting `normalize=True`.\n \"\"\"\n plt.imshow(cm, interpolation='nearest', cmap=cmap)\n plt.title(title)\n plt.colorbar()\n tick_marks = np.arange(len(classes))\n plt.xticks(tick_marks, classes, rotation=45)\n plt.yticks(tick_marks, classes)\n\n if normalize:\n cm = cm.astype('float') / cm.sum(axis=1)[:, np.newaxis]\n print(\"Normalized confusion matrix\")\n else:\n print('Confusion matrix, without normalization')\n\n print(cm)\n\n thresh = cm.max() / 2.\n for i, j in itertools.product(range(cm.shape[0]), range(cm.shape[1])):\n plt.text(j, i, cm[i, j],\n horizontalalignment=\"center\",\n color=\"white\" if cm[i, j] > thresh else \"black\")\n\n plt.tight_layout()\n plt.ylabel('True label')\n plt.xlabel('Predicted label')\n\n# Compute confusion matrix\ncnf_matrix = confusion_matrix(y_test, y_pred)\nnp.set_printoptions(precision=2)\n\n# Plot non-normalized confusion matrix\nplt.figure()\nplot_confusion_matrix(cnf_matrix, classes=class_names,\n title='Confusion matrix, without normalization')\n\n# Plot normalized confusion matrix\nplt.figure()\nplot_confusion_matrix(cnf_matrix, classes=class_names, normalize=True,\n title='Normalized confusion matrix')\n\nplt.show()"

"print(__doc__)\n\nimport itertools\nimport numpy as np\nimport matplotlib.pyplot as plt\n\nfrom sklearn import svm, datasets\nfrom sklearn.model_selection import train_test_split\nfrom sklearn.metrics import confusion_matrix\n\n# import some data to play with\niris = datasets.load_iris()\nX = iris.data\ny = iris.target\nclass_names = iris.target_names\n\n# Split the data into a training set and a test set\nX_train, X_test, y_train, y_test = train_test_split(X, y, random_state=0)\n\n# Run classifier, using a model that is too regularized (C too low) to see\n# the impact on the results\nclassifier = svm.SVC(kernel='linear', C=0.01)\ny_pred = classifier.fit(X_train, y_train).predict(X_test)\n\n\ndef plot_confusion_matrix(cm, classes,\n normalize=False,\n title='Confusion matrix',\n cmap=plt.cm.Blues):\n \"\"\"\n This function prints and plots the confusion matrix.\n Normalization can be applied by setting `normalize=True`.\n \"\"\"\n if normalize:\n cm = cm.astype('float') / cm.sum(axis=1)[:, np.newaxis]\n print(\"Normalized confusion matrix\")\n else:\n print('Confusion matrix, without normalization')\n\n print(cm)\n\n plt.imshow(cm, interpolation='nearest', cmap=cmap)\n plt.title(title)\n plt.colorbar()\n tick_marks = np.arange(len(classes))\n plt.xticks(tick_marks, classes, rotation=45)\n plt.yticks(tick_marks, classes)\n\n fmt = '.2f' if normalize else 'd'\n thresh = cm.max() / 2.\n for i, j in itertools.product(range(cm.shape[0]), range(cm.shape[1])):\n plt.text(j, i, format(cm[i, j], fmt),\n horizontalalignment=\"center\",\n color=\"white\" if cm[i, j] > thresh else \"black\")\n\n plt.tight_layout()\n plt.ylabel('True label')\n plt.xlabel('Predicted label')\n\n# Compute confusion matrix\ncnf_matrix = confusion_matrix(y_test, y_pred)\nnp.set_printoptions(precision=2)\n\n# Plot non-normalized confusion matrix\nplt.figure()\nplot_confusion_matrix(cnf_matrix, classes=class_names,\n title='Confusion matrix, without normalization')\n\n# Plot normalized confusion matrix\nplt.figure()\nplot_confusion_matrix(cnf_matrix, classes=class_names, normalize=True,\n title='Normalized confusion matrix')\n\nplt.show()"

],

"outputs": [],

"metadata": {

plt.imshow(cm,interpolation='nearest',cmap=cmap)

plt.title(title)

plt.colorbar()

tick_marks=np.arange(len(classes))

plt.xticks(tick_marks,classes,rotation=45)

plt.yticks(tick_marks,classes)

ifnormalize:

cm=cm.astype('float')/cm.sum(axis=1)[:,np.newaxis]

print("Normalized confusion matrix")

print(cm)

plt.imshow(cm,interpolation='nearest',cmap=cmap)

plt.title(title)

plt.colorbar()

tick_marks=np.arange(len(classes))

plt.xticks(tick_marks,classes,rotation=45)

plt.yticks(tick_marks,classes)

thresh=cm.max()/2.

fori,jinitertools.product(range(cm.shape[0]),range(cm.shape[1])):

plt.text(j,i,cm[i,j],

plt.text(j,i,format(cm[i,j],fmt),

horizontalalignment="center",

color="white"ifcm[i,j]>threshelse"black")