R Under development (unstable) (2024-09-02 r87090 ucrt) -- "Unsuffered Consequences"
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> library("matrixStats")
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Subsetted tests
> # - - - - - - - - - - - - - - - - - - - - - - - - - -
> source("utils/validateIndicesFramework.R")
> x <- matrix(runif(6 * 6, min = -6, max = 6), nrow = 6, ncol = 6)
> #W <- matrix(runif(6 * 6, min = -6, max = 6), nrow = 6, ncol = 6)
> for (rows in index_cases) {
+   for (cols in index_cases) {
+     if (is.null(rows)) {
+       rows <- seq_len(nrow(x))
+       rows_finite <- rows
+     } else {
+       rows_finite <- rows[is.finite(rows)]
+     }
+ 
+     if (is.null(cols)) {
+       cols <- seq_len(ncol(x))
+       cols_finite <- cols
+     } else {
+       cols_finite <- cols[is.finite(cols)]
+     }
+ 
+     suppressWarnings({
+       actual <- tryCatch({
+         rowAvgsPerColSet(x, rows = rows, S = matrix(cols, ncol = 1),
+                          FUN = rowMeans)
+       }, error = function(c) "error")
+       expect <- tryCatch({
+         rowMeans(x[rows, cols_finite, drop = FALSE], na.rm = TRUE)
+       }, error = function(c) "error")
+     })
+     stopifnot(all.equal(as.vector(actual), expect))
+ 
+     suppressWarnings({
+       actual <- tryCatch({
+         colAvgsPerRowSet(x, cols = cols, S = matrix(rows, ncol = 1),
+                          FUN = colMeans)
+       }, error = function(c) "error")
+       expect <- tryCatch({
+         colMeans(x[rows_finite, cols, drop = FALSE], na.rm = TRUE)
+       }, error = function(c) "error")
+     })
+     stopifnot(all.equal(as.vector(actual), expect))
+   }
+ }
> 
> proc.time()
   user  system elapsed 
   0.56    0.04    0.54