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train_test_split(features, targets, test_size=0.2, random_state=123) lambda_array =[] rmse_array_lasso = [] rmse_array_ridge = [] line_color = ['#021E73', '#F27272'] stop = 20 step = 0.25 if plot_type == 'zoom': stop = 1 step = 0.01 for lambda_value in np.arange(start=0.01, stop=stop, step=step):