Merge pull request #78 from SpatLyu/dev

use safer namespace loading strategy

Author: SpatLyu

R/zzz.R

@@ -1,3 +1,3 @@
-.onLoad = function(...) {
-  if (requireNamespace("Rcpp", quietly = TRUE)) loadNamespace("Rcpp")
+.onLoad = \(...) {
+  requireNamespace("Rcpp", quietly = TRUE)
 }

vignettes/surd.Rmd

@@ -2,8 +2,8 @@
 title: "Synergistic-Unique-Redundant Decomposition of Causality (SURD)"
 author: "Wenbo Lyu"
 date: |
-  | Last update: 2026-03-30
-  | Last run: 2026-03-30
+  | Last update: 2026-05-05
+  | Last run: 2026-05-05
 output: rmarkdown::html_vignette
 vignette: >
   %\VignetteIndexEntry{surd}
@@ -188,8 +188,8 @@ utils_plot_surd(res_cvds)
 
 ``` r
 popd_nb = spdep::read.gal(system.file("case/popd_nb.gal",package = "spEDM"))
-## Warning in spdep::read.gal(system.file("case/popd_nb.gal", package = "spEDM")): neighbour
-## object has 4 sub-graphs
+## Warning in spdep::read.gal(system.file("case/popd_nb.gal", package = "spEDM")): neighbour object has 4
+## sub-graphs
 popd = readr::read_csv(system.file("case/popd.csv",package = "spEDM"))
 popd_sf = sf::st_as_sf(popd, coords = c("lon","lat"), crs = 4326)
 popd_sf
@@ -302,3 +302,4 @@ utils_plot_surd(res_npp)
 * [`?infoxtr::surd()`](https://stscl.github.io/infoxtr/reference/surd.html) for function details.
 * [`spEDM`](https://cran.r-project.org/package=spEDM) package for spatial empirical dynamic modeling.
 * [`tEDM`](https://cran.r-project.org/package=tEDM) package for temporal empirical dynamic modeling.
+* [`pc`](https://cran.r-project.org/package=pc) package for pattern causality analysis.

vignettes/surd.Rmd.orig

@@ -2,7 +2,7 @@
 title: "Synergistic-Unique-Redundant Decomposition of Causality (SURD)"
 author: "Wenbo Lyu"
 date: |
-  | Last update: 2026-03-30
+  | Last update: 2026-05-05
   | Last run: `r Sys.Date()`
 output: rmarkdown::html_vignette
 vignette: >
@@ -192,3 +192,4 @@ utils_plot_surd(res_npp)
 * [`?infoxtr::surd()`](https://stscl.github.io/infoxtr/reference/surd.html) for function details.
 * [`spEDM`](https://cran.r-project.org/package=spEDM) package for spatial empirical dynamic modeling.
 * [`tEDM`](https://cran.r-project.org/package=tEDM) package for temporal empirical dynamic modeling.
+* [`pc`](https://cran.r-project.org/package=pc) package for pattern causality analysis.