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英文: How to select row with max value from a group of groups in R? 问题 我有一个包含多个分组的数据框。我想创建一个由给定组中的最大行填...
125grouping
r
go
英文: Subset the rows in a dataframe that match multiple conditions 问题 I understand your request. Here...
152dataframe
r
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英文: How can I use a value extracted from a dataframe to specify columns to subset in R? 问题 Sure, her...
141r
subset
go
英文: How can I recode scores in a set columns based on the scores on another set of columns with rela...
130r
subset
go
英文: Efficient way to edit index ranges in subsetting calls 问题 Sure, here's the translated text: 问题一直...
118r
regex
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英文: Selecting rows with certain values 问题 I would like to keep only the rows of people which both ha...
137dataframe
r
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英文: Get variable value in subset function - R 问题 在尝试获取子集函数中变量值时，我发现了一个问题。当运行代码时，我收到以下消息：“警告：Error in...
138for-loop
r
go
英文: Filtering table based on the latest row condition 问题 我可以使用 dplyr 来选择在最后一个可用日期（4/1）对所有X列都有非零数据的用户...
168dplyr
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英文: Filtering table based on row non-zero values in R 问题 我有一个如下的表格： 日期 X1 X2 X3 1/1 0 3 34 2/1 0 7 6...
198dplyr
r
go
英文: How to automatically subset a dataframe based on certain columns and store in separate dfs in R ...
148r
subset
125评论grouping
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