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1) Create a folder and R package

I’ll create an R package named kimindex. This package will contain a simple code to predict grain weight based on the area of a wheat grain. I have already developed a model equation: y=x^1.32, where y is the wheat grain weight and x is the grain area.

if(!require(devtools)) install.packages("devtools")
if(!require(usethis)) install.packages("usethis")
if(!require(available)) install.packages("available")
library(devtools)
library(usethis)
library(available)

available::available("intercept0")

Install available package if not installed

if (!requireNamespace(“available”, quietly = TRUE)) {
install.packages(“available”)
}

Check package name availability

available::available(“interptools”)

#to create a new folder
dir.create("C:/Users/R/package/kimindex")

#to create a package
create_package("C:/Users/package/kimindex")

The basic R package files for kimindex have been saved in the kimindex folder.

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2) Set up git for the package (skip)

First, you need to download Git (https://git-scm.com/downloads). Then, I’ll run use_git().

library(devtools)
use_git()

There is an error stating that user.name was not found. To solve this issue, you need to configure username and email address.

First, push window key + R, and type powershell.

and type your name and email address.

git config --global user.name "First Last name"
git config --global user.email "[email protected]"
git config --global --list

The, the run the code again.

library(devtools)
use_git()

It’s successful!!

If you see Environment section in R studio, you can see Git tab. Let’s adjust tabs in the Environment section. Go to Tools → Global Options... and select Pane Layout. I’ll only select Environment, Build and VCS.

Now, the tabs are much simple.

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3) Add R code to package

I’ll add codes for my R package. This code is to predict grain weight from area.

I’ll save this code to the folder under a new name as specified in the following code.

library(devtools)
use_r("kimindex")

The code will be saved in R folder in the designated folder (C:/Users/R/package/kimindex).

Let’s load all using the following code.

load_all()

rm(list = c("intercept0"))

Let’s check the package.

check()

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4) Modify documentation

4.1) modify DESCRIPTION

4.2) Add license

use_mit_license()

I’ll commit those files (skip)

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5) Insert Roxygen Skeleton

Go to Code → Insert Roxygen Skeleton

Let’s run the following code.

document()
?kimindex

I’ll commit those documents (SKIP)

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6) Install package

Before installing the package, I’ll finally commit R file.

Next, I’ll run the following code.

install()

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7) publish package to GitHub

modify 1)R / 2)mas folder in both local and Github

setwd("C:/Users/agron/OneDrive/Coding/R/package/datazip")
devtools::document()
devtools::install()

if(!require(remotes)) install.packages("remotes")
if (!requireNamespace("datazip", quietly = TRUE)) {
  remotes::install_github("agronomy4future/datazip", force= TRUE)
}
library(remotes)
library(datazip)

?datazip


detach("package:datazip", unload=TRUE)
unloadNamespace("datazip")

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