[{'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:gse=[] ####ground state energies to plot against mu\nfee=[] ####first excited state energies ""\ngse_err=[]\nfee_err=[]\nfor h in range(2,12,2):\nh=h+0.0\nsmu=h,\nsmu=str(smu) ####for calling respective file\nname=smu+sm+sma+sniter+spoints\ndata=pandas.read_csv(\'info\'+name+\'.txt\', delim_whitespace=True,skiprows=1)\ngse=np.append(gse, data.col1[0])\ngse_err=np.append(gse_err, data.col2[0])\nfee=np.append(fee, data.col1[1] + data.col1[0])\nfee_err=np.append(fee_err, data.col2[1] + data.col2[0])\nmu=np.arange(5, 45, 5)\nplt.figure(1)\nplt.title(\'Ground State Energy\')\nplt.xlabel(\'Elastic constant\')\nplt.ylabel(\'Energy\')\nplt.errorbar(mu,gse,yerr=gse_err,fmt=\'.\')\nplt.plot(mu, mu/((4*m)**0.5),\'r\')\nplt.show()\nplt.figure(2)\nplt.title(\'First Excited State Energy\')\nplt.xlabel(\'Elastic constant\')\nplt.ylabel(\'Energy\')\nplt.errorbar(mu,fee,yerr=fee_err,fmt=\'.\')\nplt.plot(mu, (3*mu)/((4*m)**0.5),\'r\')\nplt.show()\ngse_re=[]\nfee_re=[]\ngse_err_re=[]\nfee_err_re=[]\nmups=[7.0,9.0,12.0,14.0,17.0,22.0,27.0,32.0,37.0,42.0]\nfor h in mups:\nsmu=h,\nsmu=str(smu) ####for calling respective file\nname=smu+sm+sma+sniter+spoints\ndata=pandas.read_csv(\'info\'+name+\'.txt\', delim_whitespace=True)\ngse_re=np.append(gse_re, data.col1[0])\ngse_err_re=np.append(gse_err_re, data.col2[0])\nfee_re=np.append(fee_re, data.col1[1] + data.col1[0])\nfee_err_re=np.append(fee_err_re, data.col2[1] + data.col2[0])\nplt.figure(3)\nplt.title(\'Ground State Energy\')\nplt.xlabel(\'Elastic constant\')\nplt.ylabel(\'Energy\')\nplt.errorbar(mu,gse,yerr=gse_err,fmt=\'.\')\nplt.errorbar(mups,gse_re,yerr=gse_err_re,fmt=\'.\')\nplt.plot(mu, mu/((4*m)**0.5))\nplt.show()\nplt.figure(4)\nplt.title(\'First Excited State Energy\')\nplt.xlabel(\'Elastic constant\')\nplt.ylabel(\'Energy\')\nprint(len(fee_re))\nprint(len(fee_err))\nplt.errorbar(mu,fee,yerr=fee_err,fmt=\'.\')\nplt.errorbar(mups,fee_re,yerr=fee_err_re,fmt=\'.\')\nplt.plot(mu, (3*mu)/((4*m)**0.5))\nplt.show()'}, {'role': 'assistant', 'content': 'data_preprocessing'}]