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What’s Excel’s Connection To R? As most of you know, Excel is a spreadsheet application developed by Microsoft. It is an easily accessible tool for organizing, analyzing and storing data in tables and has a widespread use in many different application fields all over the world. It doesn't need to surprise that R has implemented some ways to read, write and manipulate Excel files (and spreadsheets in general).

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This tutorial on reading and importing Excel files into R will give an overview of some of the options that exist to import Excel files and spreadsheets of different extensions to R. Both basic commands in R and dedicated packages are covered. At the same time, some of the most common problems that you can face when loading Excel files and spreadsheets into R will be addressed. Want to dive deeper? Check out, which has a chapter on importing Excel data. Steps • • • • • • • • • • • • • •. Loading your Spreadsheets And Files Into R After saving your data set in Excel and some adjusting your workspace, you can finally start with the real importing of your file into R!

This can happen in two ways: either through basic R commands or through packages. Go through these two options and discover which option is easiest and fastest for you. Basic R Commands The following commands are all part of R’s Utils package, which is one of the core and built-in packages that contains a collection of utility functions.

You will see that these basic functions focus on getting Excel spreadsheets into R, rather than the Excel files themselves. If you are more interested in the latter, scroll just a bit to discover the packages that are specifically designed for this purpose. Read.table() As described in Step Two, Excel offers many options for saving your data sets and one of them is the tab-delimited text file or *.txt file. If your data is saved as such, you can use one of the easiest and most general options to import your file to R: the read.table() function. Df.txt', header = TRUE) You fill in the first argument of the read.table() function with the name of your text file in between ' and its extension, while you specify in the second argument header if your excel file has names in the first line or top row. The TRUE value for the header argument is the default. Remember that by executing setwd() R knows in which folder you’re working.

This means that you can also just write the file’s name as an argument of the read.table() function without specifying the file’s location, just like this: df.txt', header = TRUE) Note that the field separator character for this function is set to ' or white space because it is meant to work for tab-delimited.txt files, which separate fields based on tabs. Indeed, white spaces here indicate not only one or more spaces, but also tabs, newlines or carriage returns.

But what if your file uses another symbol to separate the fields of your data set, like in the following data set? 1/6/12:01:03/0.50/WORST 2/16/07:42:51/0.32/ BEST 3/19/12:01:29/0.50/'EMPTY' 4/13/03:22:50/0.14/INTERMEDIATE 5/8/09:30:03/0.40/WORST You can easily indicate this by adding the sep argument to the read.table() function. XLConnect XLConnect is a “comprehensive and cross-platform R package for manipulating Microsoft Excel files from within R”. You can make use of functions to create Excel workbooks, with multiple sheets if desired, and import data to them. Read in existing Excel files into R through: df ', sheet=1, startRow = 4, endCol = 2) The sheet argument specifies which sheet you exactly want to import into R. You can also add more specifications, such as startRow or startCol to indicate from which row or column the data set should be imported, or endRow or endCol to indicate the point up until where you want the data to be read in. Alternatively, the argument region allows you to specify a range, like A5:B5 to indicate starting and ending rows and columns.

Alternatively, you can also load in a whole workbook with the loadWorkbook() function, to then read in worksheets that you desire to appear as data frames in R through readWorksheet(): # Load in Workbook wb ') # Load in Worksheet df. Xlsx Package This is a second package that you can use to load in Excel files in R. The function to read in the files is just the same as the basic read.table() or its variants: df ', sheetIndex = 1) Note that it is necessary to add a sheet name or a sheet index to this function. In the example above, the first sheet of the Excel file was assigned. Pcoip Management Console Vm here. If you have a bigger data set, you might get better performance when using the read.xlsx2() function: df ', sheetIndex = 1, startRow=2, colIndex = 2) Fun fact: according to the package information, the function achieves a performance of an order of magnitude faster on sheets with 100,000 cells or more. This is because this function does more work in Java.