python – Pandas数据透视表ValueError:索引包含重复的条目,无
发布时间:2020-12-20 12:02:57 所属栏目:Python 来源:网络整理
导读:我有一个如下所示的数据帧(前3行): Sample_Name Sample_ID Sample_Type IS Component_Name IS_Name Component_Group_Name Outlier_Reasons Actual_Concentration Area Height Retention_Time Width_at_50_pct Used Calculated_Concentration AccuracyIndex
我有一个如下所示的数据帧(前3行):
Sample_Name Sample_ID Sample_Type IS Component_Name IS_Name Component_Group_Name Outlier_Reasons Actual_Concentration Area Height Retention_Time Width_at_50_pct Used Calculated_Concentration Accuracy Index 1 20170824_ELN147926_HexLacCer_Plasma_A-1-1 NaN Unknown True GluCer(d18:1/12:0)_LCB_264.3 NaN NaN NaN 0.1 2.733532e+06 5.963840e+05 2.963911 0.068676 True NaN NaN 2 20170824_ELN147926_HexLacCer_Plasma_A-1-1 NaN Unknown True GluCer(d18:1/17:0)_LCB_264.3 NaN NaN NaN 0.1 2.945190e+06 5.597470e+05 2.745026 0.068086 True NaN NaN 3 20170824_ELN147926_HexLacCer_Plasma_A-1-1 NaN Unknown False GluCer(d18:1/16:0)_LCB_264.3 GluCer(d18:1/17:0)_LCB_264.3 NaN NaN NaN 3.993535e+06 8.912731e+05 2.791991 0.059864 True 125.927659773487 NaN 尝试生成数据透视表时: pivoted_report_conc = raw_report.pivot(index = "Sample_Name",columns = 'Component_Name',values = "Calculated_Concentration") 我收到以下错误: ValueError: Index contains duplicate entries,cannot reshape 我尝试重置索引但它没有帮助.我在“索引”列中找不到任何重复值.有人可以帮忙找出问题吗? 预期的输出将是一个重新整形的数据框,只有唯一的组件名称作为列和每个样本名称的相应浓度: Sample_Name GluCer(d18:1/12:0)_LCB_264.3 GluCer(d18:1/17:0)_LCB_264.3 GluCer(d18:1/16:0)_LCB_264.3 20170824_ELN147926_HexLacCer_Plasma_A-1-1 NaN NaN 125.927659773487 为了澄清,我不打算聚合数据,只是重塑它. 解决方法
您可以使用groupby()和unstack()来绕过您在pivot()中看到的错误.
这是一些示例数据,添加了一些边缘情况,并删除了一些列值或替换为MCVE: # df Sample_Name Sample_ID IS Component_Name Calculated_Concentration Outlier_Reasons Index 1 foo NaN True x NaN NaN 1 foo NaN True y NaN NaN 2 foo NaN False z 125.92766 NaN 2 bar NaN False x 1.00 NaN 2 bar NaN False y 2.00 NaN 2 bar NaN False z NaN NaN (df.groupby(['Sample_Name','Component_Name']) .Calculated_Concentration .first() .unstack() ) 输出: Component_Name x y z Sample_Name bar 1.0 2.0 NaN foo NaN NaN 125.92766 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |