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I need to write a small R script for people who never used R before that imports a file and does some things with it. I would like to minimize user input as much as possible, and since assigning the file-path is basically all the user input required I was wondering, is it possible to get a popup screen (basically your usual "open file" screen) allowing someone to select a file (import the name as string in R or something)?
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You can use getwd() (to find the current path of the R process) or file. choose() to interactively find the file (it will return a character of the full path to the file).
R is always pointed at a directory on your computer. You can find out which directory by running the getwd (get working directory) function; this function has no arguments. To change your working directory, use setwd and specify the path to the desired folder.
To list all files in a directory in R programming language we use list. files(). This function produces a list containing the names of files in the named directory. It returns a character vector containing the names of the files in the specified directories.
The file.choose function performs this, eg:
fname <- file.choose() source(file.choose()) You may also want to look at choose.files (for multiple files) and choose.dir (for just selecting a directory path).
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The tcltk package gives you tk_choose.files.
If you want to go beyond file choosers then you can use the package to build user interfaces.
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