如何在 Google 协作中使用 R？

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最佳答案

Yes.

For a new R-notebook, use this link. (shorthand is colab.to/r )

You can learn from IRkernel demos, e.g. demo.ipynb

Save a copy in your Google Drive, and make any changes you need.

2 more demos:

Display.ipynb shows how to display HTML, images.
Comm_Demo.ipynb shows how to communicate between R and JavaScript.

See more details in IRkernel Github.

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In case you want to use Python and R together, you can use R magic for some cells.

# activate R magic
%load_ext rpy2.ipython

Then, whenever you want to use R, you begin the cell with %%R

%%R
x <- 42
print(x)

More details in rpy2 documentation

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Open this link in your browser to create a new notebook with R Kernel

https://colab.research.google.com/notebook#create=true&language=r

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Update: this doesn't work anymore (july 2020).

The above link on answers above takes directly to R notebook, there you have an option change between R or python. It is strange that Google is changing services just like this. Hence stackoverflow not a great platform to promote tools created by profit mongering/data-selling companies.

Old answer:

As of now if you click at Runtime on menu bar then choose Change Runtime Type, you can choose between R or Python.

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To expand on a previous answer, here's how you can move dataframes between the R and Python kernels so you can work with both in the same notebook (for example, if you want to load data in with Pandas, process it with an R package, and then plot it with Bokeh).

# Pandas dataframe to R data frame
!pip3 install rpy2
%load_ext rpy2.ipython
%R -i df

# R data frame to Pandas dataframe
%R seq.data <- read.delim('sequence.index', header=TRUE, stringsAsFactors=FALSE)
seq_data = %R seq.data

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*****Working as of Friday 13th November 2020

Go this URL https://colab.to/r whilst signed into colab and that should do it.

You can check if R in Runtime -> Change runtime type, but it should already be setup.

To mount google drive:

install.packages("googledrive")
library("googledrive")


if (file.exists("/usr/local/lib/python3.6/dist-packages/google/colab/_ipython.py")){
install.packages("R.utils")
library("R.utils")
library("httr")
my_check <- function() {return(TRUE)}
reassignInPackage("is_interactive", pkgName = "httr", my_check)
options(rlang_interactive=TRUE)
}

And authenticate google drive

drive_auth(use_oob = TRUE, cache = TRUE)

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Another quick way is to replace postix, .ipynb in colab title to .r
Example: change name of Untitled.ipynb to Untitled.r, and everything works perfectly!