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Hi, I have a microarray dataset of dimension 25000x30 and try to clustering using hclust(). But the clustering on the rows failed due to the size: > y<-hclust(dist(data),method='average') Error: cannot allocate vector of size 1.9 Gb I tried to increase the memory using memory.limit(size=3000), still got the same error. I also tried agnes() from cluster package and pvclust() from