diff --git a/DESCRIPTION b/DESCRIPTION
index e6d503c..9aec835 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: FastUtils
 Type: Package
-Title: What the Package Does in One 'Title Case' Line
+Title: Fast, readable utility functions.
 Version: 0.1.0
 Date: 2024-05-23
 Authors@R: c(person("Qile", "Yang", email = "qile.yang@berkeley.edu", role = c("cre","aut","cph")))
@@ -15,6 +15,7 @@ Imports:
     data.table,
     dplyr,
     ggplot2,
+    hash,
     Rcpp (>= 1.0.12)
 LinkingTo: Rcpp
 Suggests: 
diff --git a/R/color.R b/R/color.R
new file mode 100644
index 0000000..33464c8
--- /dev/null
+++ b/R/color.R
@@ -0,0 +1,25 @@
+#' @export
+#' @source https://stackoverflow.com/questions/649454
+#'
+getAvgHex <- function(...) {
+    Reduce(function(hex1, hex2) {
+        grDevices::rgb(
+            t((grDevices::col2rgb(hex1) + grDevices::col2rgb(hex2)) / 2),
+            maxColorValue = 255
+        )
+    }, unlist(list(...)))
+}
+
+#' @export
+scaleHex <- function(hex, scaleFactor) {
+
+    if (all(scaleFactor == 1)) return(hex)
+
+    hsv_color <- hex %>%
+        grDevices::col2rgb() %>%
+        grDevices::rgb2hsv()
+
+    hsv_color["v", ] <- bound(hsv_color["v", ] * scaleFactor, 0, 1)
+
+    grDevices::hsv(hsv_color["h", ], hsv_color["s", ], hsv_color["v", ])
+}
diff --git a/R/dataInitialization.R b/R/dataInitialization.R
index b2b9097..4928e86 100644
--- a/R/dataInitialization.R
+++ b/R/dataInitialization.R
@@ -1,5 +1,16 @@
 #' @export
-EmptyTable <- function() {
+initV <- function(typeFunc, x, initVal = NULL) {
+    if (is(typeFunc, "character")) {
+        v <- vector(typeFunc, x)
+    } else {
+        v <- typeFunc(x)
+    }
+    if (is.null(initVal)) return(v)
+    sapply(v, function(i) initVal)
+}
+
+#' @export
+initEmptyTable <- function() {
     structure(
         integer(0),
         dim = 0L,
@@ -9,16 +20,26 @@ EmptyTable <- function() {
 }
 
 #' @export
-initList <- function(x, initVal = NULL) {
-    l <- vector("list", x)
-    if (!is_an_integer(x)) names(l) <- as.character(x)
-    if (is.null(initVal)) return(l)
-    lapply(l, function(x) initVal)
+tableToNumeric <- function(x) {
+    structure(as.numeric(x), names = names(x))
+}
+
+#' @export
+namedNumericToTable <- function(x) {
+    output <- as.integer(x)
+    names(output) <- names(x)
+    output <- as.table(output)
+    names(dimnames(output)) <- ""
+    output
 }
 
-#' @export 
-getlast <- function(x, n = 1) {
-    index <- length(x) - n + 1
-    if (is.list(x)) return(x[[index]])
-    x[index]
+#' @export
+createHash <- function(keys, init_vals = NULL) {
+    keys <- unique(keys)
+    numkeys <- length(keys)
+    switch(as.character(numkeys),
+        "0" = hash::hash(),
+        "1" = hash::hash(keys, init_vals),
+        hash::hash(keys, initList(numkeys, init_vals))
+    )
 }
diff --git a/R/iteration.R b/R/iteration.R
index 55863f5..6e37462 100644
--- a/R/iteration.R
+++ b/R/iteration.R
@@ -4,6 +4,13 @@ getUniquePairsUpTo <- function(x, oneIndexed = TRUE) {
     rcppGetUniquePairsUpTo(as.integer(x), oneIndexed = oneIndexed)
 }
 
+#' @export
+getlast <- function(x, n = 1) {
+    index <- length(x) - n + 1
+    if (is.list(x)) return(x[[index]])
+    x[index]
+}
+
 #' @export
 zip <- function(...) mapply(list, ..., SIMPLIFY = FALSE)
 
diff --git a/R/math.R b/R/math.R
index 3684290..3075d11 100644
--- a/R/math.R
+++ b/R/math.R
@@ -1,15 +1,27 @@
-bound_num <- function(num, lowerbound, upperbound) {
-    min(max(num, lowerbound), upperbound)
+#' @export
+bound <- function(num, lowerbound, upperbound) {
+    sapply(num, function(x) min(max(x, lowerbound), upperbound))
 }
 
-is_bound_between <- function(num, lowerbound, upperbound) {
+#' @export
+isBound <- function(num, lowerbound, upperbound) {
     (num >= lowerbound) & (num <= upperbound)
 }
 
+#' @export
 add <- function(x, y) x + y
+
+#' @export
 subtract <- function(x, y) x - y
+
+#' @export
 multiply <- function(x, y) x * y
+
+#' @export
 divide <- function(x, y) x / y
 
-is_even <- function(x) x %% 2 == 0
-is_odd <- function(x) x %% 2 == 1
+#' @export
+isEven <- function(x) x %% 2 == 0
+
+#' @export
+isOdd <- function(x) x %% 2 == 1
diff --git a/README.md b/README.md
index f1efb5f..756d8fe 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![MIT license](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/Qile0317/FastUtils/blob/main/LICENSE.md)
 <!-- badges: end -->
 
-R package for readable, and fast utility functions.
+R package for fast, readable utility functions.
 
 ## Installation