How to write multiple .csv files from a list of data frames into a new folder with the original filename?

Question

As the subject suggests, I'm trying to write a list of data frames into a new folder so, that the original name stays same as the original file (and so that the original files don't get overwritten in the original folder!). Tried the code below, but simply didn't get the syntax working:

sapply(names(points_calculated), 
       function (x) write_csv(points_calculated[[x]], file=paste("./ExperimentFolder/PointsFolder", x)))

jpiversen · Accepted Answer · 2022-04-02 15:05:02Z

2

Given that points_calculated is a list of data.frames, and the names(points_calculated) are the filename you want, you can do the following:

library(purrr)
points_calculated %>%
  iwalk(
    ~ readr::write_csv(.x, file = paste("./ExperimentFolder/PointsFolder", .y))
  )
)

imap() will iterate over your list, and perform the function after ~. .x is the element of the list (the data.frame), and .y is it's name.

answered Apr 2, 2022 at 15:05

jpiversen

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