diff --git a/R/colour-manip.r b/R/colour-manip.r
index 241f2d29..b96d3d59 100644
--- a/R/colour-manip.r
+++ b/R/colour-manip.r
@@ -50,7 +50,7 @@ muted <- function(colour, l=30, c=70) col2hcl(colour, l=l, c=c)
 #' @examples
 #' alpha("red", 0.1)
 #' alpha(colours(), 0.5)
-#' alpha("red", seq(0, 1, length = 10))
+#' alpha("red", seq(0, 1, length.out = 10))
 alpha <- function(colour, alpha = NA) {
   col <- col2rgb(colour, TRUE) / 255
   
diff --git a/R/pal-brewer.r b/R/pal-brewer.r
index 325a339e..7b28b2f4 100644
--- a/R/pal-brewer.r
+++ b/R/pal-brewer.r
@@ -11,11 +11,11 @@
 #' @examples
 #' show_col(brewer_pal()(10))
 #' show_col(brewer_pal("div")(5))
-#' show_col(brewer_pal(pal = "Greens")(5))
+#' show_col(brewer_pal(palette = "Greens")(5))
 #'
 #' # Can use with gradient_n to create a continous gradient
 #' cols <- brewer_pal("div")(5)
-#' show_col(gradient_n_pal(cols)(seq(0, 1, length = 30)))
+#' show_col(gradient_n_pal(cols)(seq(0, 1, length.out = 30)))
 brewer_pal <- function(type = "seq", palette = 1, direction = 1) {
   pal <- pal_name(palette, type)
 
diff --git a/R/pal-dichromat.r b/R/pal-dichromat.r
index 706aac9b..b7c55248 100644
--- a/R/pal-dichromat.r
+++ b/R/pal-dichromat.r
@@ -9,7 +9,7 @@
 #'
 #' # Can use with gradient_n to create a continous gradient
 #' cols <- dichromat_pal("DarkRedtoBlue.12")(12)
-#' show_col(gradient_n_pal(cols)(seq(0, 1, length = 30)))
+#' show_col(gradient_n_pal(cols)(seq(0, 1, length.out = 30)))
 dichromat_pal <- function(name) {
   if (!any(name == names(dichromat::colorschemes))) {
     stop("Palette name must be one of ",
diff --git a/R/pal-gradient.r b/R/pal-gradient.r
index da60ab48..ce04f217 100644
--- a/R/pal-gradient.r
+++ b/R/pal-gradient.r
@@ -1,25 +1,25 @@
 #' Arbitrary colour gradient palette (continous).
-#' 
+#'
 #' @param colours vector of colours
 #' @param values if colours should not be evenly positioned along the gradient
 #'   this vector gives the position (between 0 and 1) for each colour in the
 #'   \code{colours} vector. See \code{\link{rescale}} for a convience function
 #'   to map an arbitrary range to between 0 and 1.
 #' @param space colour space in which to calculate gradient.  "Lab" usually
-#'   best unless gradient goes through white. 
+#'   best unless gradient goes through white.
 #' @export
 gradient_n_pal <- function(colours, values = NULL, space = "Lab") {
   ramp <- colorRamp(colours, space = space)
 
   function(x) {
     if (length(x) == 0) return(character())
-    
+
     if (!is.null(values)) {
-      xs <- seq(0, 1, length = length(values))      
+      xs <- seq(0, 1, length.out = length.out(values))
       f <- approxfun(values, xs)
       x <- f(x)
     }
-    
+
     nice_rgb(ramp(x))
   }
 }
@@ -34,36 +34,36 @@ nice_rgb <- function(x) {
 }
 
 #' Diverging colour gradient (continous).
-#' 
+#'
 #' @param low colour for low end of gradient.
 #' @param mid colour for mid point
 #' @param high colour for high end of gradient.
 #' @param space colour space in which to calculate gradient.  "Lab" usually
-#'   best unless gradient goes through white. 
+#'   best unless gradient goes through white.
 #' @export
 #' @examples
-#' x <- seq(-1, 1, length = 100)
+#' x <- seq(-1, 1, length.out = 100)
 #' r <- sqrt(outer(x^2, x^2, "+"))
-#' image(r, col = div_gradient_pal()(seq(0, 1, length = 12)))
-#' image(r, col = div_gradient_pal()(seq(0, 1, length = 30)))
-#' image(r, col = div_gradient_pal()(seq(0, 1, length = 100)))
+#' image(r, col = div_gradient_pal()(seq(0, 1, length.out = 12)))
+#' image(r, col = div_gradient_pal()(seq(0, 1, length.out = 30)))
+#' image(r, col = div_gradient_pal()(seq(0, 1, length.out = 100)))
 #'
 #' library(munsell)
-#' image(r, col = div_gradient_pal(low = 
-#'    mnsl(complement("10R 4/6", fix = TRUE)))(seq(0, 1, length = 100)))
+#' image(r, col = div_gradient_pal(low =
+#'    mnsl(complement("10R 4/6", fix = TRUE)))(seq(0, 1, length.out = 100)))
 div_gradient_pal <- function(low = mnsl("10B 4/6"), mid = mnsl("N 8/0"), high = mnsl("10R 4/6"), space = "Lab") {
   gradient_n_pal(c(low, mid, high), space = space)
 }
 
 #' Sequential colour gradient palette (continous).
-#' 
+#'
 #' @param low colour for low end of gradient.
 #' @param high colour for high end of gradient.
 #' @param space colour space in which to calculate gradient.  "Lab" usually
-#'   best unless gradient goes through white. 
+#'   best unless gradient goes through white.
 #' @export
 #' @examples
-#' x <- seq(0, 1, length = 25)
+#' x <- seq(0, 1, length.out = 25)
 #' show_col(seq_gradient_pal()(x))
 #' show_col(seq_gradient_pal("white", "black")(x))
 #'
diff --git a/R/pal-hue.r b/R/pal-hue.r
index 8afd14ab..3c72d664 100644
--- a/R/pal-hue.r
+++ b/R/pal-hue.r
@@ -30,7 +30,7 @@ hue_pal <- function(h = c(0, 360) + 15, c = 100, l = 65, h.start = 0, direction
     }
 
     rotate <- function(x) (x + h.start) %% 360 * direction
-    hues <- rotate(seq(h[1], h[2], length = n))
+    hues <- rotate(seq(h[1], h[2], length.out = n))
 
     grDevices::hcl(hues, c, l)
   }
diff --git a/R/scale-continuous.r b/R/scale-continuous.r
index 70d39cee..0bb331d2 100644
--- a/R/scale-continuous.r
+++ b/R/scale-continuous.r
@@ -23,7 +23,7 @@
 cscale <- function(x, palette, na.value = NA_real_, trans = identity_trans()) {
   stopifnot(is.trans(trans))
   
-  x <- trans$trans(x)
+  x <- trans$transform(x)
   limits <- train_continuous(x)
   map_continuous(palette, x, limits, na.value)
 }
diff --git a/R/trans-date.r b/R/trans-date.r
index 9dd0fe63..1fd9c354 100644
--- a/R/trans-date.r
+++ b/R/trans-date.r
@@ -4,8 +4,8 @@
 #' @examples
 #' years <- seq(as.Date("1910/1/1"), as.Date("1999/1/1"), "years")
 #' t <- date_trans()
-#' t$trans(years)
-#' t$inv(t$trans(years))
+#' t$transform(years)
+#' t$inverse(t$transform(years))
 #' t$format(t$breaks(range(years)))
 date_trans <- function() {
   trans_new("date", "from_date", "to_date", breaks = pretty_breaks())
@@ -28,19 +28,19 @@ from_date <- function(x) {
 #' @examples
 #' hours <- seq(ISOdate(2000,3,20, tz = ""), by = "hour", length.out = 10)
 #' t <- time_trans()
-#' t$trans(hours)
-#' t$inv(t$trans(hours))
+#' t$transform(hours)
+#' t$inverse(t$transform(hours))
 #' t$format(t$breaks(range(hours)))
 time_trans <- function(tz = NULL) {
-  
+
   to_time <- function(x) {
     force(x)
     structure(x, class = c("POSIXt", "POSIXct"), tzone = tz)
   }
-  
+
   from_time <- function(x) {
     if (!inherits(x, "POSIXct")) {
-      stop("Invalid input: time_trans works with objects of class ", 
+      stop("Invalid input: time_trans works with objects of class ",
         "POSIXct only", call. = FALSE)
     }
     if (is.null(tz)) {
@@ -48,16 +48,16 @@ time_trans <- function(tz = NULL) {
     }
     structure(as.numeric(x), names = names(x))
   }
-  
+
   trans_new("time", "from_time", "to_time", breaks = pretty_breaks())
 }
 
 
 #' Regularly spaced dates.
-#' 
+#'
 #' @param width an interval specification, one of "sec", "min", "hour",
 #'   "day", "week", "month", "year". Can be by an integer and a space, or
-#'   followed by "s". 
+#'   followed by "s".
 #' @export
 date_breaks <- function(width = "1 month") {
   function(x) fullseq(x, width)
@@ -65,7 +65,7 @@ date_breaks <- function(width = "1 month") {
 
 
 #' Formatted dates.
-#' 
+#'
 #' @param format Date format using standard POSIX specification.  See
 #'  \code{\link{strptime}} for possible formats.
 #' @param tz a time zone name, see \code{\link{timezones}}. Defaults
diff --git a/R/trans.r b/R/trans.r
index 0cad808e..8d6354d1 100644
--- a/R/trans.r
+++ b/R/trans.r
@@ -56,5 +56,5 @@ as.trans <- function(x) {
 #' @export
 trans_range <- function(trans, x) {
   trans <- as.trans(trans)
-  range(trans$trans(range(squish(x, trans$domain), na.rm = TRUE)))
+  range(trans$transform(range(squish(x, trans$domain), na.rm = TRUE)))
 }
diff --git a/man/alpha.Rd b/man/alpha.Rd
index e6cac660..a87b08b3 100644
--- a/man/alpha.Rd
+++ b/man/alpha.Rd
@@ -20,6 +20,6 @@ Vectorised in both colour and alpha.
 \examples{
 alpha("red", 0.1)
 alpha(colours(), 0.5)
-alpha("red", seq(0, 1, length = 10))
+alpha("red", seq(0, 1, length.out = 10))
 }
 
diff --git a/man/brewer_pal.Rd b/man/brewer_pal.Rd
index 9b28c019..00db611f 100644
--- a/man/brewer_pal.Rd
+++ b/man/brewer_pal.Rd
@@ -22,11 +22,11 @@ Color Brewer palette (discrete).
 \examples{
 show_col(brewer_pal()(10))
 show_col(brewer_pal("div")(5))
-show_col(brewer_pal(pal = "Greens")(5))
+show_col(brewer_pal(palette = "Greens")(5))
 
 # Can use with gradient_n to create a continous gradient
 cols <- brewer_pal("div")(5)
-show_col(gradient_n_pal(cols)(seq(0, 1, length = 30)))
+show_col(gradient_n_pal(cols)(seq(0, 1, length.out = 30)))
 }
 \references{
 \url{http://colorbrewer2.org}
diff --git a/man/date_trans.Rd b/man/date_trans.Rd
index 3f8b33f7..88a9feac 100644
--- a/man/date_trans.Rd
+++ b/man/date_trans.Rd
@@ -12,8 +12,8 @@ Transformation for dates (class Date).
 \examples{
 years <- seq(as.Date("1910/1/1"), as.Date("1999/1/1"), "years")
 t <- date_trans()
-t$trans(years)
-t$inv(t$trans(years))
+t$transform(years)
+t$inverse(t$transform(years))
 t$format(t$breaks(range(years)))
 }
 
diff --git a/man/dichromat_pal.Rd b/man/dichromat_pal.Rd
index 0a33a858..3d9c0551 100644
--- a/man/dichromat_pal.Rd
+++ b/man/dichromat_pal.Rd
@@ -19,6 +19,6 @@ show_col(dichromat_pal("BluetoOrange.10")(5))
 
 # Can use with gradient_n to create a continous gradient
 cols <- dichromat_pal("DarkRedtoBlue.12")(12)
-show_col(gradient_n_pal(cols)(seq(0, 1, length = 30)))
+show_col(gradient_n_pal(cols)(seq(0, 1, length.out = 30)))
 }
 
diff --git a/man/div_gradient_pal.Rd b/man/div_gradient_pal.Rd
index d925b3f2..ed8d0d2a 100644
--- a/man/div_gradient_pal.Rd
+++ b/man/div_gradient_pal.Rd
@@ -21,14 +21,14 @@ best unless gradient goes through white.}
 Diverging colour gradient (continous).
 }
 \examples{
-x <- seq(-1, 1, length = 100)
+x <- seq(-1, 1, length.out = 100)
 r <- sqrt(outer(x^2, x^2, "+"))
-image(r, col = div_gradient_pal()(seq(0, 1, length = 12)))
-image(r, col = div_gradient_pal()(seq(0, 1, length = 30)))
-image(r, col = div_gradient_pal()(seq(0, 1, length = 100)))
+image(r, col = div_gradient_pal()(seq(0, 1, length.out = 12)))
+image(r, col = div_gradient_pal()(seq(0, 1, length.out = 30)))
+image(r, col = div_gradient_pal()(seq(0, 1, length.out = 100)))
 
 library(munsell)
 image(r, col = div_gradient_pal(low =
-   mnsl(complement("10R 4/6", fix = TRUE)))(seq(0, 1, length = 100)))
+   mnsl(complement("10R 4/6", fix = TRUE)))(seq(0, 1, length.out = 100)))
 }
 
diff --git a/man/seq_gradient_pal.Rd b/man/seq_gradient_pal.Rd
index f105526e..e8621abe 100644
--- a/man/seq_gradient_pal.Rd
+++ b/man/seq_gradient_pal.Rd
@@ -19,7 +19,7 @@ best unless gradient goes through white.}
 Sequential colour gradient palette (continous).
 }
 \examples{
-x <- seq(0, 1, length = 25)
+x <- seq(0, 1, length.out = 25)
 show_col(seq_gradient_pal()(x))
 show_col(seq_gradient_pal("white", "black")(x))
 
diff --git a/man/time_trans.Rd b/man/time_trans.Rd
index 04ad475a..08aeb2db 100644
--- a/man/time_trans.Rd
+++ b/man/time_trans.Rd
@@ -16,8 +16,8 @@ Transformation for times (class POSIXt).
 \examples{
 hours <- seq(ISOdate(2000,3,20, tz = ""), by = "hour", length.out = 10)
 t <- time_trans()
-t$trans(hours)
-t$inv(t$trans(hours))
+t$transform(hours)
+t$inverse(t$transform(hours))
 t$format(t$breaks(range(hours)))
 }
 
diff --git a/tests/testthat/test-alpha.r b/tests/testthat/test-alpha.r
index b5d07896..a436df80 100644
--- a/tests/testthat/test-alpha.r
+++ b/tests/testthat/test-alpha.r
@@ -7,7 +7,7 @@ hex <- function(x) {
 
 test_that("missing alpha preserves existing", {
   cols <- col2rgb(rep("red", 5), TRUE) / 255
-  cols[4, ] <- seq(0, 1, length = ncol(cols))
+  cols[4, ] <- seq(0, 1, length.out = ncol(cols))
 
   reds <- rgb(cols[1,], cols[2,], cols[3,], cols[4, ])
 
@@ -24,7 +24,7 @@ test_that("alpha values recycled to match colour", {
 })
 
 test_that("col values recycled to match alpha", {
-  alphas <- round(seq(0, 255, length = 3))
+  alphas <- round(seq(0, 255, length.out = 3))
   reds <- alpha("red", alphas / 255)
   reds_alpha <- col2rgb(reds, TRUE)[4, ]
   
diff --git a/tests/testthat/test-scale.r b/tests/testthat/test-scale.r
index 3d4ccc23..73d8807b 100644
--- a/tests/testthat/test-scale.r
+++ b/tests/testthat/test-scale.r
@@ -1,7 +1,7 @@
 context("Scale")
 
 test_that("NA.value works for continuous scales", {
-  x <- c(NA, seq(0, 1, length = 10), NA)
+  x <- c(NA, seq(0, 1, length.out = 10), NA)
   pal <- rescale_pal()
   
   expect_that(cscale(x, pal)[1], equals(NA_real_))