[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:# .... continue Correlation\n\n# Plot correlation between range of stores\nstart_store = 1\nend_store   = 5\n\nfig, (axis1) = plt.subplots(1,1,figsize=(15,5))\n\n# using summation of sales values for each store \nsns.heatmap(store_piv[list(range(start_store, end_store+1))].corr(),annot=True,linewidths=2)\n\n# using percent change for each store\n# sns.heatmap(store_pct_chage[list(range(start_store, end_store+1))].corr(),annot=True,linewidths=2)'}, {'role': 'assistant', 'content': 'result_visualization'}]