document select method

NEWS.md

@@ -3,6 +3,8 @@
 
 ** Bugfixes
 
+* support for tidyverse select method for polar volume and polar scan objects (#668,#460)
+
 * Updated the default refractive index value used in conversion of linear reflectivity (eta) to logarithmic reflectivity (dBZ) (#642). The effect is a 7% increase in animal densities in output of functions `integrate_to_ppi()` and `read_cajun()` only.
 
 # bioRad 0.7.3

R/select.R

@@ -1,3 +1,22 @@
+#' Tidyverse methods for bioRad objects
+#'
+#' Tidyverse methods for bioRad objects, currently only select is implemented. When \code{dplyr} or \code{tidyverse} is loaded the \code{select} method can be used to select parameters.
+#' @param .data data object of class \code{scan} or \code{pvol}
+#' @param ... other arguments
+#' @name tidyverse
+#' @examples
+#' if (require(dplyr, quietly = TRUE)) {
+#' # locate example volume file:
+#' pvolfile <- system.file("extdata", "volume.h5", package = "bioRad")
+#'
+#' # load the file:
+#' example_pvol <- read_pvolfile(pvolfile)
+#' pvol_selected<-select(example_pvol, DBZH, ZDR) 
+#' # Only selected parameters are retained in the pvol
+#' get_scan(pvol_selected, 1.5)
+#' # Also a series of parameters in a scan can be selected
+#' select(get_scan(example_pvol, 2.5), VRADH:ZDR)
+#' }
 # generalizations for the dplyr verb `select` to `scan` and `pvol` objects
 select.scan <- function(.data, ...) {
   if (!requireNamespace("dplyr", quietly = TRUE)) {

_pkgdown.yml

@@ -51,6 +51,7 @@ reference:
       - integrate_to_ppi
       - calculate_param
       - apply_mistnet
+      - tidyverse
       - Math.scan
   - title: "Plotting radar scans"
     desc: "Functions to plot a polar volume (pvol), scan (scan) or parameter (param) on a grid or basemap as a plan position indicator (ppi)."