Update group-sequential-testing.Rmd

xidongdxi · xidongdxi · commit cfd99a528c7d · 2026-03-27T10:53:10.000-04:00
diff --git a/vignettes/group-sequential-testing.Rmd b/vignettes/group-sequential-testing.Rmd
@@ -13,7 +13,9 @@ vignette: >
 ```{r, include = FALSE}
 knitr::opts_chunk$set(
   collapse = TRUE,
-  comment = "#>"
+  comment = "#>",
+  dpi = 192,
+  fig.retina = 2
 )
 ```
 
