added show concept to roxygen for show_mettrndseason

R/show_mettrndseason.R

@@ -19,6 +19,8 @@
 #' 
 #' Four colors are used to define increasing, decreasing, no trend, or no estimate (i.e., too few points for the window).  The names and the colors can be changed using the \code{nms} and \code{cols} arguments, respectively.  The \code{cmbn} argument can be used to combine the no trend and no estimate colors into one color and label.  In this case, the colors and labels may be misleading with the default names since no trend is shown for points where no estimates were made. 
 #' 
+#' @concept show
+#' 
 #' @return A \code{\link[ggplot2]{ggplot}} object
 #' @export
 #'