R help - May 2007 - using cutree() to figure out the heatmap cluster labels on the left

I've been using heatmap(), hclust(), and cutree(), and I'm trying to
figure
out the column labels of the left (as opposed to the right) cluster.

Using cutree(x, k=2), I get two clusters labeled 1 and 2.  How do you figure
out if cluster 2 is the one associated with the left cluster on the heatmap
(instead of manually going to the heatmap)?

Thanks,
Andrew

Andrew Yee, MD
MGH Cancer Center

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