当你使用rename时，你需要输入new column name=old column name：
file: 表示文件名,默认值为data ncolumns: 正整数,表示保存到文件中数据的列数,若是字符型数据,默认值为1;若是数值型数据,默认值为5 append: 逻辑变量,取值为TRUE时,表示在已有文件上添加数据;取值为FALSE(默认值)时,写入一个新文件 例如:在R中输入以下命令,观察其运行效果: A<-matrix(1:25,ncol =5) A...
vector might contain names that don't exist in the data,# use `any_of()` insteadlookup <- c(lookup, new ="unknown")try(rename(iris, all_of(lookup)))#> Error in all_of(lookup) : Can'trenamecolumns that don't exist.#> ✖ Column `unknown` doesn't exist.rename(iris, any_of(l...
There is only 2 columns shown below.colnames(datasets::cars) [1] "speed" "dist" If we wanted to rename the column “dist” to make it easier to know what the data is/means we can do so in a few different ways. Using dplyr:
dplyr & plyr Error: Can’t rename columns that don’t exist. Summarize Multiple Columns of data.table by Group in R Remove Multiple Columns from data.table in R R Programming Overview Summary: In this article, you have learned how toedit the column names of a data.tablein R programming....
#' `new_name = old_name` syntax; `rename_with()` renames columns using a #' function. #' #' @inheritParams arrange #' @param ... #' For `rename()`: <[`tidy-select`][dplyr_tidy_select]> Use #' `new_name = old_name` to rename selected variables. #' #' For `rename_with...
Do you need tochange only one column namein R? Would you like torename all columnsof your data frame? Or do you want toreplace some variable namesof your data, but keep the other columns like they are? Above, you can find the basic R code for these three data situations. For further...
Because of this, I typically think thatdplyr::rename()is a better tool for renaming variables in R. Rename columns with the colnames() function You can also rename variables with thecolnames()function. Here's an example: df <- tibble( ...
你可以用safely()Package 你的函数，然后执行可以继续，并且返回result和error对象。标点符号可能有点棘手...
hadley changed the title enhancement to rename all columns rename_all, rename_if, rename_at Feb 16, 2017 hadley added the nse label Feb 22, 2017 hadley assigned lionel- Feb 22, 2017 lionel- added a commit to lionel-/dplyr that referenced this issue Mar 28, 2017 Add scoped variants...