R Under development (unstable) (2024-10-04 r87206 ucrt) -- "Unsuffered Consequences"
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> suppressMessages(library(gplots))
> 
> dat <- as.matrix(read.csv(file="dat.csv", row.names=1))
> dist2 <- function(x) as.dist(1-cor(t(x), method="pearson"))
> hclust1 <- function(x) hclust(x, method = "single")
> 
> distance <- dist2(dat)
> cluster  <- hclust1(distance)
> 
> dend <- as.dendrogram(cluster)
> 
> ## R's default recursion limits will be exceeded when plotting this dendrogram
> try( gplots:::plot.dendrogram(dend) )
> try( heatmap.2(dat, Rowv=dend) )
> 
> ## Increase them and try again
> options("expressions"=20000)
> gplots:::plot.dendrogram(dend)
> heatmap.2(dat, Rowv=dend)
> 
> proc.time()
   user  system elapsed 
   6.70    0.23    6.90