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#!/usr/bin/python """ starter code for the regression mini-project loads up/formats a modified version of the dataset (why modified? we've removed some trouble points that you'll find yourself in the outliers mini-project) draws a little scatterplot of the training/testing data you fill in the regression code where indicated """ import sys import pickle sys.path.append("../tools/") from feature_format import featureFormat, targetFeatureSplit dictionary = pickle.load( open("../final_project/final_project_dataset_modified.pkl", "r") ) ### list the features you want to look at--first item in the ### list will be the "target" feature features_list = ["bonus", "salary"] data = featureFormat( dictionary, features_list, remove_any_zeroes=True)#, "long_term_incentive"], remove_any_zeroes=True ) target, features = targetFeatureSplit( data ) ### training-testing split needed in regression, just like classification from sklearn.cross_validation import train_test_split feature_train, feature_test, target_train, target_test = train_test_split(features, target, test_size=0.5, random_state=42) train_color = "b" test_color = "b" ### your regression goes here! ### please name it reg, so that the plotting code below picks it up and ### plots it correctly ### draw the scatterplot, with color-coded training and testing points import matplotlib.pyplot as plt for feature, target in zip(feature_test, target_test): plt.scatter( feature, target, color=test_color ) for feature, target in zip(feature_train, target_train): plt.scatter( feature, target, color=train_color ) ### labels for the legend plt.scatter(feature_test[0], target_test[0], color=test_color, label="test") plt.scatter(feature_test[0], target_test[0], color=train_color, label="train") ### draw the regression line, once it's coded try: plt.plot( feature_test, reg.predict(feature_test) ) except NameError: pass plt.xlabel(features_list[1]) plt.ylabel(features_list[0]) plt.legend() plt.show()
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