diff --git a/.Rbuildignore b/.Rbuildignore
index 88b0533..7334216 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,3 +1,5 @@
+^renv$
+^renv\.lock$
 ^LICENSE\.md$
 ^.*\.Rproj$
 ^\.Rproj\.user$
@@ -6,3 +8,5 @@
 ^docs$
 ^pkgdown$
 ^\.lintr$
+^data-raw$
+^renv.*
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index d9de82f..47c376f 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -29,12 +29,12 @@ jobs:
           - {os: windows-latest, r: '3.6'}
 
           # Use older ubuntu to maximise backward compatibility
-          - {os: ubuntu-18.04,   r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-18.04,   r: 'release'}
-          - {os: ubuntu-18.04,   r: 'oldrel-1'}
-          - {os: ubuntu-18.04,   r: 'oldrel-2'}
-          - {os: ubuntu-18.04,   r: 'oldrel-3'}
-          - {os: ubuntu-18.04,   r: 'oldrel-4'}
+          - {os: ubuntu-20.04,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-20.04,   r: 'release'}
+          - {os: ubuntu-20.04,   r: 'oldrel-1'}
+          - {os: ubuntu-20.04,   r: 'oldrel-2'}
+          - {os: ubuntu-20.04,   r: 'oldrel-3'}
+          - {os: ubuntu-20.04,   r: 'oldrel-4'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
@@ -43,19 +43,19 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - uses: r-lib/actions/setup-pandoc@v1
+      - uses: r-lib/actions/setup-pandoc@v2
 
-      - uses: r-lib/actions/setup-r@v1
+      - uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
-      - uses: r-lib/actions/setup-r-dependencies@v1
+      - uses: r-lib/actions/setup-r-dependencies@v2
         with:
-          extra-packages: rcmdcheck
+          extra-packages: rcmdcheck, knitr
 
-      - uses: r-lib/actions/check-r-package@v1
+      - uses: r-lib/actions/check-r-package@v2
 
       - name: Show testthat output
         if: always()
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index 6388f75..212c4fc 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -14,16 +14,17 @@ jobs:
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: r-lib/actions/setup-r@v1
+      - uses: r-lib/actions/setup-r@v2
         with:
           use-public-rspm: true
 
-      - uses: r-lib/actions/setup-r-dependencies@v1
+      - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: lintr
 
       - name: Lint
-        run: lintr::lint_package()
+        run: lintr::lint_package(linters = lintr::linters_with_defaults(object_name_linter = lintr::object_name_linter("camelCase")))
         shell: Rscript {0}
+
diff --git a/.gitignore b/.gitignore
index 0dddc4b..fbe71ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,6 @@ vignettes/*.pdf
 .Renviron
 inst/doc
 docs
+
+.Rprofile
+renv/
\ No newline at end of file
diff --git a/DESCRIPTION b/DESCRIPTION
index e2161da..1658ef4 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: DevelExample
 Title: A Basic R Package to Demonstrate a Cycle of Code Development
-Version: 0.0.1
+Version: 0.1.1
 Authors@R: 
     person(given = "Joshua",
            family = "Campbell",
@@ -15,10 +15,12 @@ Encoding: UTF-8
 biocViews: Clustering
 LazyData: false
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.1.1
+RoxygenNote: 7.2.3
 Suggests: 
     knitr,
     rmarkdown,
     testthat (>= 3.0.0)
 Config/testthat/edition: 3
 VignetteBuilder: knitr
+Depends: 
+    R (>= 2.10)
diff --git a/NAMESPACE b/NAMESPACE
index 01843dc..6bd620a 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -1,3 +1,4 @@
 # Generated by roxygen2: do not edit by hand
 
+export(euclideanDist)
 export(hello)
diff --git a/NEWS.md b/NEWS.md
index 4cd8ae2..8bf56cb 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,6 @@
-# Changes in Version 0.0.1 (2022-05-08)
+# Changes in Version 0.1.1 (2023-04-09)
 * Created package
 * Added Hello World function
 * Added documentation, unit tests, and vignettes
 * Added a `NEWS.md` file to track changes to the package.
+* Added function to calculate euclidean dist
diff --git a/R/data.R b/R/data.R
new file mode 100644
index 0000000..20b993d
--- /dev/null
+++ b/R/data.R
@@ -0,0 +1,9 @@
+#' Example dataset
+#' A dataset containing a matrix with two columns that were generated
+#' with a random normal distribution with a mean of 0 and stdev of 1. 
+#' @format A matrix with 100 rows and 2 columns
+#' @keywords datasets
+#' @usage data("example_data")
+#' @examples
+#' data("example_data")
+"example_data"
\ No newline at end of file
diff --git a/R/distance.R b/R/distance.R
new file mode 100644
index 0000000..40a8cf7
--- /dev/null
+++ b/R/distance.R
@@ -0,0 +1,30 @@
+#' @title Euclidean distance
+#' @description Calculates Euclidean distance between two vectors. An error will be 
+#' given if NAs are present in either vector.
+#' @param a The first vector to use in the distance calculation.
+#' @param b The second vector to use in the distance calculation.
+#' @param verbose Boolean. If \code{TRUE}, a message will be printed. Default \code{TRUE}.
+#' @return A numeric value of a distance
+#' @examples
+#' data(example_data)
+#' euclideanDist(example_data[,1], example_data[,2], verbose = FALSE)
+#' @export
+euclideanDist <- function(a, b, verbose = FALSE) {
+  if (isTRUE(verbose)) {
+    message("Calculating distance ...")
+  }
+  
+  # Check validity of data
+  .check_data(a)
+  .check_data(b)
+  
+  # Perform calculation
+  res <- sqrt(sum((a-b)^2))
+  return(res)
+}
+
+.check_data <- function(input) {
+  if (any(is.na(input))) {
+    stop("'input' must not contain NAs")
+  }
+}
\ No newline at end of file
diff --git a/R/functions.R b/R/functions.R
index 5e2937a..e4fa2eb 100644
--- a/R/functions.R
+++ b/R/functions.R
@@ -1,3 +1,4 @@
+
 #' @title Hello world
 #' @description A simple function to print Hello world
 #'
@@ -14,4 +15,4 @@ hello <- function(withExcitement = TRUE) {
     str <- "Hello world."
   }
   return(str)
-}
+  }
diff --git a/_pkgdown.yml b/_pkgdown.yml
index e69de29..d71acfb 100644
--- a/_pkgdown.yml
+++ b/_pkgdown.yml
@@ -0,0 +1,4 @@
+url: ~
+template:
+  bootstrap: 5
+
diff --git a/data-raw/example_data.R b/data-raw/example_data.R
new file mode 100644
index 0000000..24efc73
--- /dev/null
+++ b/data-raw/example_data.R
@@ -0,0 +1,6 @@
+## code to prepare `example_data` dataset goes here
+set.seed(123)
+a <- rnorm(100)
+b <- rnorm(100)
+example_data <- cbind(a, b)
+usethis::use_data(example_data, overwrite = TRUE)
diff --git a/data/example_data.rda b/data/example_data.rda
new file mode 100644
index 0000000..ea06561
Binary files /dev/null and b/data/example_data.rda differ
diff --git a/man/euclideanDist.Rd b/man/euclideanDist.Rd
new file mode 100644
index 0000000..ed10e85
--- /dev/null
+++ b/man/euclideanDist.Rd
@@ -0,0 +1,26 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/distance.R
+\name{euclideanDist}
+\alias{euclideanDist}
+\title{Euclidean distance}
+\usage{
+euclideanDist(a, b, verbose = FALSE)
+}
+\arguments{
+\item{a}{The first vector to use in the distance calculation.}
+
+\item{b}{The second vector to use in the distance calculation.}
+
+\item{verbose}{Boolean. If \code{TRUE}, a message will be printed. Default \code{TRUE}.}
+}
+\value{
+A numeric value of a distance
+}
+\description{
+Calculates Euclidean distance between two vectors. An error will be
+given if NAs are present in either vector.
+}
+\examples{
+data(example_data)
+euclideanDist(example_data[,1], example_data[,2], verbose = FALSE)
+}
diff --git a/man/example_data.Rd b/man/example_data.Rd
new file mode 100644
index 0000000..be597cf
--- /dev/null
+++ b/man/example_data.Rd
@@ -0,0 +1,23 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/data.R
+\docType{data}
+\name{example_data}
+\alias{example_data}
+\title{Example dataset
+A dataset containing a matrix with two columns that were generated
+with a random normal distribution with a mean of 0 and stdev of 1.}
+\format{
+A matrix with 100 rows and 2 columns
+}
+\usage{
+data("example_data")
+}
+\description{
+Example dataset
+A dataset containing a matrix with two columns that were generated
+with a random normal distribution with a mean of 0 and stdev of 1.
+}
+\examples{
+data("example_data")
+}
+\keyword{datasets}
diff --git a/renv.lock b/renv.lock
new file mode 100644
index 0000000..cce1729
--- /dev/null
+++ b/renv.lock
@@ -0,0 +1,854 @@
+{
+  "R": {
+    "Version": "4.2.3",
+    "Repositories": [
+      {
+        "Name": "BioCsoft",
+        "URL": "https://bioconductor.org/packages/3.15/bioc"
+      },
+      {
+        "Name": "BioCann",
+        "URL": "https://bioconductor.org/packages/3.15/data/annotation"
+      },
+      {
+        "Name": "BioCexp",
+        "URL": "https://bioconductor.org/packages/3.15/data/experiment"
+      },
+      {
+        "Name": "BioCworkflows",
+        "URL": "https://bioconductor.org/packages/3.15/workflows"
+      },
+      {
+        "Name": "BioCbooks",
+        "URL": "https://bioconductor.org/packages/3.15/books"
+      },
+      {
+        "Name": "CRAN",
+        "URL": "https://cran.rstudio.com"
+      }
+    ]
+  },
+  "Packages": {
+    "R6": {
+      "Package": "R6",
+      "Version": "2.5.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R"
+      ],
+      "Hash": "470851b6d5d0ac559e9d01bb352b4021"
+    },
+    "askpass": {
+      "Package": "askpass",
+      "Version": "1.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "sys"
+      ],
+      "Hash": "e8a22846fff485f0be3770c2da758713"
+    },
+    "base64enc": {
+      "Package": "base64enc",
+      "Version": "0.1-3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R"
+      ],
+      "Hash": "543776ae6848fde2f48ff3816d0628bc"
+    },
+    "brio": {
+      "Package": "brio",
+      "Version": "1.1.3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Hash": "976cf154dfb043c012d87cddd8bca363"
+    },
+    "bslib": {
+      "Package": "bslib",
+      "Version": "0.4.2",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "base64enc",
+        "cachem",
+        "grDevices",
+        "htmltools",
+        "jquerylib",
+        "jsonlite",
+        "memoise",
+        "mime",
+        "rlang",
+        "sass"
+      ],
+      "Hash": "a7fbf03946ad741129dc81098722fca1"
+    },
+    "cachem": {
+      "Package": "cachem",
+      "Version": "1.0.7",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "fastmap",
+        "rlang"
+      ],
+      "Hash": "cda74447c42f529de601fe4d4050daef"
+    },
+    "callr": {
+      "Package": "callr",
+      "Version": "3.7.3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "R6",
+        "processx",
+        "utils"
+      ],
+      "Hash": "9b2191ede20fa29828139b9900922e51"
+    },
+    "cli": {
+      "Package": "cli",
+      "Version": "3.6.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "utils"
+      ],
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+    },
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+      "Repository": "CRAN",
+      "Hash": "ed588261931ee3be2c700d22e94a29ab"
+    },
+    "crayon": {
+      "Package": "crayon",
+      "Version": "1.5.2",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "grDevices",
+        "methods",
+        "utils"
+      ],
+      "Hash": "e8a1e41acf02548751f45c718d55aa6a"
+    },
+    "curl": {
+      "Package": "curl",
+      "Version": "5.0.0",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R"
+      ],
+      "Hash": "e4f97056611e8e6b8b852d13b7400cf1"
+    },
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+      "Requirements": [
+        "R",
+        "R6",
+        "cli",
+        "rprojroot",
+        "utils"
+      ],
+      "Hash": "6b9602c7ebbe87101a9c8edb6e8b6d21"
+    },
+    "diffobj": {
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+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "crayon",
+        "methods",
+        "stats",
+        "tools",
+        "utils"
+      ],
+      "Hash": "bcaa8b95f8d7d01a5dedfd959ce88ab8"
+    },
+    "digest": {
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+      "Version": "0.6.31",
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+      "Requirements": [
+        "R",
+        "utils"
+      ],
+      "Hash": "8b708f296afd9ae69f450f9640be8990"
+    },
+    "downlit": {
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+      "Version": "0.4.2",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+        "brio",
+        "desc",
+        "digest",
+        "evaluate",
+        "fansi",
+        "memoise",
+        "rlang",
+        "vctrs",
+        "withr",
+        "yaml"
+      ],
+      "Hash": "79bf3f66590752ffbba20f8d2da94c7c"
+    },
+    "ellipsis": {
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+      "Version": "0.3.2",
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+      "Requirements": [
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+        "rlang"
+      ],
+      "Hash": "bb0eec2fe32e88d9e2836c2f73ea2077"
+    },
+    "evaluate": {
+      "Package": "evaluate",
+      "Version": "0.20",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+        "methods"
+      ],
+      "Hash": "4b68aa51edd89a0e044a66e75ae3cc6c"
+    },
+    "fansi": {
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+      "Version": "1.0.4",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "grDevices",
+        "utils"
+      ],
+      "Hash": "1d9e7ad3c8312a192dea7d3db0274fde"
+    },
+    "fastmap": {
+      "Package": "fastmap",
+      "Version": "1.1.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Hash": "f7736a18de97dea803bde0a2daaafb27"
+    },
+    "fontawesome": {
+      "Package": "fontawesome",
+      "Version": "0.5.0",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "htmltools",
+        "rlang"
+      ],
+      "Hash": "e80750aec5717dedc019ad7ee40e4a7c"
+    },
+    "fs": {
+      "Package": "fs",
+      "Version": "1.6.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "methods"
+      ],
+      "Hash": "f4dcd23b67e33d851d2079f703e8b985"
+    },
+    "glue": {
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+      "Version": "1.6.2",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+        "methods"
+      ],
+      "Hash": "4f2596dfb05dac67b9dc558e5c6fba2e"
+    },
+    "highr": {
+      "Package": "highr",
+      "Version": "0.10",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "xfun"
+      ],
+      "Hash": "06230136b2d2b9ba5805e1963fa6e890"
+    },
+    "htmltools": {
+      "Package": "htmltools",
+      "Version": "0.5.5",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "base64enc",
+        "digest",
+        "ellipsis",
+        "fastmap",
+        "grDevices",
+        "rlang",
+        "utils"
+      ],
+      "Hash": "ba0240784ad50a62165058a27459304a"
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+      "Package": "httr",
+      "Version": "1.4.5",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "R6",
+        "curl",
+        "jsonlite",
+        "mime",
+        "openssl"
+      ],
+      "Hash": "f6844033201269bec3ca0097bc6c97b3"
+    },
+    "jquerylib": {
+      "Package": "jquerylib",
+      "Version": "0.1.4",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+      "Hash": "5aab57a3bd297eee1c1d862735972182"
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+      "Version": "1.8.4",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+    },
+    "knitr": {
+      "Package": "knitr",
+      "Version": "1.42",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "evaluate",
+        "highr",
+        "methods",
+        "tools",
+        "xfun",
+        "yaml"
+      ],
+      "Hash": "8329a9bcc82943c8069104d4be3ee22d"
+    },
+    "lifecycle": {
+      "Package": "lifecycle",
+      "Version": "1.0.3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "R",
+        "cli",
+        "glue",
+        "rlang"
+      ],
+      "Hash": "001cecbeac1cff9301bdc3775ee46a86"
+    },
+    "magrittr": {
+      "Package": "magrittr",
+      "Version": "2.0.3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+      "Hash": "7ce2733a9826b3aeb1775d56fd305472"
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+      "Version": "2.0.1",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "cachem",
+        "rlang"
+      ],
+      "Hash": "e2817ccf4a065c5d9d7f2cfbe7c1d78c"
+    },
+    "mime": {
+      "Package": "mime",
+      "Version": "0.12",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
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+      "Hash": "18e9c28c1d3ca1560ce30658b22ce104"
+    },
+    "openssl": {
+      "Package": "openssl",
+      "Version": "2.0.6",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "askpass"
+      ],
+      "Hash": "0f7cd2962e3044bb940cca4f4b5cecbe"
+    },
+    "pillar": {
+      "Package": "pillar",
+      "Version": "1.9.0",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "cli",
+        "fansi",
+        "glue",
+        "lifecycle",
+        "rlang",
+        "utf8",
+        "utils",
+        "vctrs"
+      ],
+      "Hash": "15da5a8412f317beeee6175fbc76f4bb"
+    },
+    "pkgconfig": {
+      "Package": "pkgconfig",
+      "Version": "2.0.3",
+      "Source": "Repository",
+      "Repository": "CRAN",
+      "Requirements": [
+        "utils"
+      ],
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+      ],
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+    },
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+      ],
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+        "jsonlite",
+        "lifecycle",
+        "magrittr",
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+        "pkgload",
+        "praise",
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+        "ps",
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+      ],
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+        "pkgconfig",
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+        "utils",
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+      ],
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+        "stats",
+        "tools"
+      ],
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+    },
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+        "R",
+        "methods"
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+}
diff --git a/tests/testthat.R b/tests/testthat.R
index 35ab969..94ef759 100644
--- a/tests/testthat.R
+++ b/tests/testthat.R
@@ -1,3 +1,11 @@
+# This file is part of the standard setup for testthat.
+# It is recommended that you do not modify it.
+#
+# Where should you do additional test configuration?
+# Learn more about the roles of various files in:
+# * https://r-pkgs.org/tests.html
+# * https://testthat.r-lib.org/reference/test_package.html#special-files
+
 library(testthat)
 library(DevelExample)
 
diff --git a/tests/testthat/test-euclidean.R b/tests/testthat/test-euclidean.R
new file mode 100644
index 0000000..4717226
--- /dev/null
+++ b/tests/testthat/test-euclidean.R
@@ -0,0 +1,7 @@
+library("DevelExample")
+data(example_data)
+
+test_that("Testing euclideanDist function", {
+  res <- dist(rbind(example_data[, 1], example_data[, 2]))[1]
+  expect_equal(euclideanDist(example_data[, 1], example_data[, 2]), res)
+  expect_error(euclideanDist(c(1, 2), c(NA, 2)), regexp = "contain NAs")})
\ No newline at end of file
diff --git a/vignettes/DevelExample.Rmd b/vignettes/DevelExample.Rmd
index 170fadb..5c30b4d 100644
--- a/vignettes/DevelExample.Rmd
+++ b/vignettes/DevelExample.Rmd
@@ -39,4 +39,13 @@ It is usually a good idea to show the session information to help with reproduci
 ```{r session}
 sessionInfo()
 ```
+To calculate the euclidean distance between two vectors, we can use the `euclideanDist` function. In this example we will generate two random vectors from normal distributions with two different means and calculate the distance between them:
+```{r dist}
+set.seed(12345)
+v1 <- rnorm(10000, mean = 1)
+v2 <- rnorm(10000, mean = 2)
+res <- euclideanDist(v1, v2, verbose = FALSE)
+res
 
+```
+The `set.seed` function is used for the random number generator and ensures the same vectors will be produced each time for reproducibility.