import only named functions from stats

NEWS.md

@@ -1,5 +1,11 @@
 # NEWS for ggseas
 
+## 0.5.3
+* Move stats, zoo and seasonal to imports rather than depends, and import only needed named functions
+
+## 0.5.2
+* Explicitly build vignette
+
 ## 0.5.1
 * Minor improvements to documentation eg giving the vignette a title.
 

pkg/DESCRIPTION

@@ -1,6 +1,6 @@
 Package: ggseas
 Title: 'stats' for Seasonal Adjustment on the Fly with 'ggplot2'
-Version: 0.5.2.9000
+Version: 0.5.3.9000
 Authors@R: c(
    person("Peter", "Ellis", , "peter.ellis2013nz@gmail.com", c("aut", "cre")),
    person("Christophe", "Sax", role = "ctb")
@@ -10,9 +10,10 @@ Description: Provides 'ggplot2' 'stats' that estimate seasonally adjusted series
     and rolling summaries such as rolling average on the fly for time series.
 Depends:
     R (>= 3.1.2), 
+    ggplot2 (>= 2.0.0)
+Imports:
     seasonal, 
-    ggplot2 (>= 2.0.0), 
-    stats, 
+    stats,
     zoo
 License: GPL-3
 LazyData: true

pkg/NAMESPACE

@@ -9,5 +9,8 @@ export(stat_stl)
 export(tsdf)
 import(ggplot2)
 import(seasonal)
-import(stats)
+importFrom(stats,decompose)
+importFrom(stats,stl)
+importFrom(stats,time)
+importFrom(stats,ts)
 importFrom(zoo,rollapplyr)

pkg/R/ggsdc.R

@@ -1,6 +1,6 @@
 
 
-#' @import stats
+#' @importFrom stats ts decompose stl time
 ggsdc_helper <- function(data, mapping, method, s.window, 
                          type = c("additive", "multiplicative"),
                          index.ref, index.basis, start, frequency,