[{'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:# visualize correlation matrix\ndef visualize_corr_matrix(data):\n    numerical_col, cat_col = get_numerical_and_categorical_col(data)\n    df = data[numerical_col]\n    corr = df.corr()# plot the heatmap\n    #generating masks for upper triangle so that values are not repeated\n    mask_ut=np.triu(np.ones(corr.shape)).astype(np.bool)\n    sns.heatmap(corr, mask=mask_ut, xticklabels=corr.columns, yticklabels=corr.columns, annot=True, cmap=sns.diverging_palette(220, 20, as_cmap=True))'}, {'role': 'assistant', 'content': 'result_visualization'}]