Supress globalVar note

Author: hadley

R/facet-labels.r

@@ -61,94 +61,96 @@ label_bquote <- function(expr = beta ^ .(x)) {
       eval(substitute(bquote(expr, list(x = x)), list(expr = quoted))))
   }
 }
+globalVariables("x")
+
 
 #' Label facets with a word wrapped label.
-#' 
+#'
 #' Uses \code{\link[base]{strwrap}} for line wrapping.
 #' @param width integer, target column width for output.
 #' @export
 #' @seealso , \code{\link{labeller}}
 label_wrap_gen <- function(width = 25) {
   function(variable, values) {
-    vapply(strwrap(as.character(values), width = width, simplify = FALSE), 
+    vapply(strwrap(as.character(values), width = width, simplify = FALSE),
            paste, vector('character', 1), collapse = "\n")
   }
 }
 
 #' Generic labeller function for facets
-#' 
+#'
 #' One-step function for providing methods or named character vectors
 #' for displaying labels in facets.
-#' 
+#'
 #' The provided methods are checked for number of arguments.
-#' If the provided method takes less than two 
-#' (e.g. \code{\link[Hmisc]{capitalize}}), 
+#' If the provided method takes less than two
+#' (e.g. \code{\link[Hmisc]{capitalize}}),
 #' the method is passed \code{values}.
-#' Else (e.g. \code{\link{label_both}}), 
+#' Else (e.g. \code{\link{label_both}}),
 #' it is passed \code{variable} and \code{values} (in that order).
 #' If you want to be certain, use e.g. an anonymous function.
-#' If errors are returned such as ``argument ".." is missing, with no default'' 
+#' If errors are returned such as ``argument ".." is missing, with no default''
 #' or ``unused argument (variable)'', matching the method's arguments does not
 #' work as expected; make a wrapper function.
-#' 
 #'
-#' @param ... Named arguments of the form \code{variable=values}, 
-#'   where \code{values} could be a vector or method.         
-#' @param keep.as.numeric logical, default TRUE. When FALSE, converts numeric 
+#'
+#' @param ... Named arguments of the form \code{variable=values},
+#'   where \code{values} could be a vector or method.
+#' @param keep.as.numeric logical, default TRUE. When FALSE, converts numeric
 #'   values supplied as margins to the facet to characters.
 #' @family facet labeller
-#' @return Function to supply to 
+#' @return Function to supply to
 #'   \code{\link{facet_grid}} for the argument \code{labeller}.
-#' @export 
+#' @export
 #' @examples
-#' 
+#'
 #' data(mpg)
-#' 
+#'
 #' p1 <- ggplot(mpg, aes(cty, hwy)) + geom_point()
-#' 
-#' 
+#'
+#'
 #' p1 + facet_grid(cyl ~ class, labeller=label_both)
-#'   
+#'
 #' p1 + facet_grid(cyl ~ class, labeller=labeller(cyl=label_both))
-#'   
-#' ggplot(mtcars, aes(x = mpg, y = wt)) + geom_point() + 
-#'   facet_grid(vs + am ~ gear, margins=TRUE, 
+#'
+#' ggplot(mtcars, aes(x = mpg, y = wt)) + geom_point() +
+#'   facet_grid(vs + am ~ gear, margins=TRUE,
 #'              labeller=labeller(vs=label_both, am=label_both))
-#' 
-#' 
-#' 
+#'
+#'
+#'
 #' data(msleep)
 #' capitalize <- function(string) {
 #'   substr(string, 1, 1) <- toupper(substr(string, 1, 1))
-#'  string 
+#'  string
 #' }
 #' conservation_status <- c('cd'='Conservation Dependent',
-#'                          'en'='Endangered', 
+#'                          'en'='Endangered',
 #'                          'lc'='Least concern',
-#'                          'nt'='Near Threatened', 
+#'                          'nt'='Near Threatened',
 #'                          'vu'='Vulnerable',
 #'                          'domesticated'='Domesticated')
-#' ## Source: http://en.wikipedia.org/wiki/Wikipedia:Conservation_status 
+#' ## Source: http://en.wikipedia.org/wiki/Wikipedia:Conservation_status
 #'
-#' p2 <- ggplot(msleep, aes(x=sleep_total, y=awake)) + geom_point() + 
+#' p2 <- ggplot(msleep, aes(x=sleep_total, y=awake)) + geom_point() +
 #' p2 + facet_grid(vore ~ conservation, labeller=labeller(vore=capitalize))
-#'   
-#' p2 + facet_grid(vore ~ conservation, 
+#'
+#' p2 + facet_grid(vore ~ conservation,
 #'   labeller=labeller(vore=capitalize, conservation=conservation_status ))
-#' 
-#' # We could of course have renamed the levels; 
+#'
+#' # We could of course have renamed the levels;
 #' # then we can apply another nifty function:
 #' library(plyr)
-#' msleep$conservation2 <- revalue(msleep$conservation, conservation_status)                         
+#' msleep$conservation2 <- revalue(msleep$conservation, conservation_status)
 #'
 #' p2 + facet_grid(vore ~ conservation2, labeller=labeller(vore=capitalize))
-#' 
-#' p2 + facet_grid(vore ~ conservation2, 
+#'
+#' p2 + facet_grid(vore ~ conservation2,
 #'   labeller=labeller(conservation2=label_wrap_gen(10) ))
-#' 
+#'
 labeller <- function(..., keep.as.numeric=FALSE) {
   args <- list(...)
-  
+
   function(variable, values) {
     if (is.logical(values)) {
       values <- as.integer(values) + 1
@@ -157,27 +159,27 @@ labeller <- function(..., keep.as.numeric=FALSE) {
     } else if (is.numeric(values) & !keep.as.numeric) {
       values <- as.character(values)
     }
-      
+
     res <- args[[variable]]
-    
+
     if (is.null(res)) {
       # If the facetting margin (i.e. `variable`) was not specified when calling
       # labeller, default to use the actual values.
       result <- values
-      
+
     } else if (is.function(res)) {
       # How should `variable` and `values` be passed to a function? ------------
-      arguments <- length(formals(res))    
+      arguments <- length(formals(res))
       if (arguments < 2) {
         result <- res(values)
       } else {
         result <- res(variable, values)
-      }     
-      
+      }
+
     } else {
       result <- res[values]
     }
-    
+
     return(result)
   }
 }