[英]Writing a new column in all excel files (and all sheets in an excel file) in a folder using R
所以,我在一個文件夾中有很多 excel 文件,每個文件都有多個工作表。 If the name of the excel file is 'xyz', I want each sheet of each excel file to contain a 'new_column' such that each row of the new column will contain the excel file name (in this example, 'xyz').
有沒有直接的方法可以做到這一點? 我寧願直接更改文件夾中的文件,而不在 rstudio 中創建新的數據幀。
謝謝。
你可以使用雙lapply
-
library(readxl)
library(writexl)
#Get a vector of xlsx filenames
filenames <- list.files(pattern = '.xlsx', full.names = TRUE)
lapply(filenames, function(x) {
#Read the sheet names
sheetname <- excel_sheets(x)
#For each sheet read the data and create list of dataframe
lapply(sheetname, function(y) {
cbind(read_xlsx(x, y), filename = x)
}) -> res
#Assign names to the list
names(res) <- sheetname
#Write the data back
write_xlsx(res, x)
})
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