Switched to interpolation instead of akima

Author: robjhyndman

DESCRIPTION

@@ -13,7 +13,6 @@ Description: All functions and data sets required for the examples in the book
     Hyndman (2024) "That's Weird: Anomaly Detection Using R" <https://OTexts.com/weird/>.  
     All packages needed to run the examples are also loaded.
 Imports:
-  akima,
   aplpack,
   broom,
   cli (>= 1.0.0),
@@ -23,6 +22,7 @@ Imports:
   evd,
   ggplot2 (>= 3.1.1),
   grDevices,
+  interpolation,
   ks,
   purrr (>= 0.2.4),
   rlang,

NEWS.md

@@ -1,8 +1,7 @@
-# weird 1.0.1
+# weird 1.0.2
 
 * Removed wine_reviews dataset and created `fetch_wine_reviews()` function.
-* Switched from interp to akima for bivariate interpolation due to problems on M1.
-* Bug fix.
+* Bug fixes.
 
 # weird 1.0.0
 

R/density.R

@@ -121,11 +121,8 @@ density_on_grid <- function(y, fy, ngrid) {
   ))
   # Bivariate interpolation
   grid <- expand.grid(density$eval.points[[1]], density$eval.points[[2]])
-  density$estimate <- akima::interpp(
-    x = y[, 1], y = y[, 2], z = fy,
-    xo = grid[, 1], yo = grid[, 2]
-  )$z |>
-    suppressWarnings() |>
+  ifun <- interpolation::interpfun(x = y[, 1], y = y[, 2], z = fy)
+  density$estimate <- ifun(grid[,1], grid[,2]) |>
     matrix(nrow = ngrid)
   return(density)
 }

cran-comments.md

@@ -1,4 +1,5 @@
 Corrected errors reported at <https://cran.r-project.org/web/checks/check_results_weird.html>.
+Corrected licensing issues with interpolation imports
 
 ## Test environments