colnames(df)[ colnames(df) %in% c('aaa', 'bbb') ] <- c('a', 'b') 综上可以看出,右侧为列的新名称字符串或者向量,左侧的重点在于找到需要重命名的列的下标。 参考:https://statisticsglobe.com/rename-column-name-in-r-data-frame/
Example 2: Rename a Column in a data.table Without Indexing the Column In this section, I’ll demonstrate how to change the name of a column without indexing it. Sometimes, our dataset consists of many columns and we may not be sure which is the number of the column that we want to ...
# Change colname of one columncolnames(data)[colnames(data)=="Old_Name"]<-"New_Name"# Change colnames of all columnscolnames(data)<-c("New_Name1","New_Name2","New_Name3")# Change colnames of some columnscolnames(data)[colnames(data)%in%c("Old_Name1","Old_Name2")]<-c("New_Na...
The effect of elevated pressure on the stability of the homogeneous bubbly flow regime in a gas-liquid bubble column is examined. Experiments were performe... HM Letzel,JC Schouten,dBCM Van,... - 《Chemical Engineering Science》 被引量: 445发表: 1997年 Homology of a 150K cytoplasmic dynein...
Change the scaffold rails_helper.rb template to use require_relative. (Jon Dufresne, #2528)5.0.3 / 2022-01-26Full ChangelogBug Fixes:Properly name params in controller and request spec templates when using the --model-name parameter. (@kenzo-tanaka, #2534) Fix parameter matching with mail ...
removeColumnAt(index:uint)— 方法, 类 fl.controls.DataGrid 删除位于 columns 数组中指定索引处的列。 removeColumnFromSort— 属性, 类 mx.events.AdvancedDataGridEvent 如果为 true,则从多列排序中删除列。 removeController(controller:flashx.textLayout.container:ContainerController)— 方法, 接口 flashx.textLa...
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AddColumn(T) Method AddIndex(T) Method AddTable(T) Method Execute Method DatabaseSchemaUpdater Properties Extensions Class Microsoft.Phone.Data.Linq.Mapping Namespace Microsoft.VisualBasic Namespace Microsoft.VisualBasic.CompilerServices Namespace
column_name "false" quoted boolean Controls the name column returned by DBI::dbColumnInfo. Equivalent to the Teradata JDBC Driver COLUMN_NAME connection parameter. False specifies that the returned name column provides the AS-clause name if available, or the column name if available, or the colu...