Easy way to export multiple data frame to multiple Excel worksheets

Question

I am surprised to find that there is no easy way to export multiple data.frame to multiple worksheets of an Excel file? I tried xlsx package, seems it can only write to one sheet (override old sheet); I also tried WriteXLS package, but it gives me error all the time...

My code structure is like this: by design, for each iteration, the output dataframe (tempTable) and the sheetName (sn) got updated and exported into one tab.

for (i in 2 : ncol(code)){ 
        ...
        tempTable <- ...
        sn <- ...
        WriteXLS("tempTable", ExcelFileName = "C:/R_code/../file.xlsx",
              SheetNames = sn);
}

I can export to several cvs files, but there has to be an easy way to do that in Excel, right?

Answer 1

To export numerous data frames from R to multiple Excel worksheets, use the following basic syntax:

library(openxlsx)

dataset_names <- list('Sheet1' = df1, 'Sheet2' = df2, 'Sheet3' = df3)
write.xlsx(dataset_names, file = 'mydata.xlsx')

Exporting Multiple Data Frames to Multiple Excel Sheets is an example.
Let's pretend we have the following three R data frames:

#define data frames
df1 = data.frame(playerID=c(1, 2, 3, 4),
                 team=c('A', 'B', 'B', 'C'))

df2 = data.frame(playerID=c(1, 2, 3, 4),
                 rebounds=c(7, 8, 8, 14))

df3 = data.frame(playerID=c(1, 2, 3, 4),
                 points=c(19, 22, 25, 29))

To export all three of these data frames to distinct sheets within the same Excel file, use the following syntax:

library(openxlsx)

#define sheet names for each data frame
dataset_names <- list('Sheet1' = df1, 'Sheet2' = df2, 'Sheet3' = df3)

#export each data frame to separate sheets in same Excel file
openxlsx::write.xlsx(dataset_names, file = 'mydata.xlsx')