{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Breast cancer diagnosis classification with scikit-learn (run model explainer locally)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Copyright (c) Microsoft Corporation. All rights reserved.\n",
    "\n",
    "Licensed under the MIT License."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Explain a model with the AML explain-model package\n",
    "\n",
    "1. Train a SVM classification model using Scikit-learn\n",
    "2. Run 'explain_model' with full data in local mode, which doesn't contact any Azure services\n",
    "3. Run 'explain_model' with summarized data in local mode, which doesn't contact any Azure services\n",
    "4. Visualize the global and local explanations with the visualization dashboard."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from sklearn.datasets import load_breast_cancer\n",
    "from sklearn import svm\n",
    "from azureml.explain.model.tabular_explainer import TabularExplainer"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 1. Run model explainer locally with full data"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Load the breast cancer diagnosis data"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "breast_cancer_data = load_breast_cancer()\n",
    "classes = breast_cancer_data.target_names.tolist()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Split data into train and test\n",
    "from sklearn.model_selection import train_test_split\n",
    "x_train, x_test, y_train, y_test = train_test_split(breast_cancer_data.data, breast_cancer_data.target, test_size=0.2, random_state=0)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Train a SVM classification model, which you want to explain"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "clf = svm.SVC(gamma=0.001, C=100., probability=True)\n",
    "model = clf.fit(x_train, y_train)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Explain predictions on your local machine"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "tabular_explainer = TabularExplainer(model, x_train, features=breast_cancer_data.feature_names, classes=classes)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Explain overall model predictions (global explanation)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Passing in test dataset for evaluation examples - note it must be a representative sample of the original data\n",
    "# x_train can be passed as well, but with more examples explanations will take longer although they may be more accurate\n",
    "global_explanation = tabular_explainer.explain_global(x_test)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Sorted SHAP values\n",
    "print('ranked global importance values: {}'.format(global_explanation.get_ranked_global_values()))\n",
    "# Corresponding feature names\n",
    "print('ranked global importance names: {}'.format(global_explanation.get_ranked_global_names()))\n",
    "# feature ranks (based on original order of features)\n",
    "print('global importance rank: {}'.format(global_explanation.global_importance_rank))\n",
    "# per class feature names\n",
    "print('ranked per class feature names: {}'.format(global_explanation.get_ranked_per_class_names()))\n",
    "# per class feature importance values\n",
    "print('ranked per class feature values: {}'.format(global_explanation.get_ranked_per_class_values()))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "dict(zip(global_explanation.get_ranked_global_names(), global_explanation.get_ranked_global_values()))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Explain overall model predictions as a collection of local (instance-level) explanations"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# feature shap values for all features and all data points in the training data\n",
    "print('local importance values: {}'.format(global_explanation.local_importance_values))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Explain local data points (individual instances)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# explain the first member of the test set\n",
    "instance_num = 0\n",
    "local_explanation = tabular_explainer.explain_local(x_test[instance_num,:])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# get the prediction for the first member of the test set and explain why model made that prediction\n",
    "prediction_value = clf.predict(x_test)[instance_num]\n",
    "\n",
    "sorted_local_importance_values = local_explanation.get_ranked_local_values()[prediction_value]\n",
    "sorted_local_importance_names = local_explanation.get_ranked_local_names()[prediction_value]\n",
    "\n",
    "\n",
    "dict(zip(sorted_local_importance_names, sorted_local_importance_values))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# 2. Load visualization dashboard"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from azureml.contrib.explain.model.visualize import ExplanationDashboard"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ExplanationDashboard(global_explanation, model, x_test)"
   ]
  }
 ],
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  "authors": [
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    "name": "mesameki"
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