[{'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:N = 50\nx = counts_dataframe ['coverage']\ny = counts_dataframe ['majorbase_ratio']\narea = np.pi * (15 * np.random.rand(N))**2  # 0 to 15 point radiuses\nplt.scatter(x, y, alpha=0.5)\nplt.xlabel ('Number of Reads (Sequence Coverage)', fontsize=14)\nplt.ylabel ('Proportion with Prevailing Nucleotide (Invariability)', fontsize=14)\nplt.legend (['Rleationship between coverage and invariability'], loc = 'lower right')"}, {'role': 'assistant', 'content': 'data_exploration'}]