I am using R for a simple hierarchical clustering method for finding protein sequence similarities. I already have a distance matrix computed. I am using the
hclust method to run it (thus I dont want to use
dist method). Could anyone tell me what format does my distance matrix need to be for
hclust to run?
I used the
read.xls method to read my Excel file. I need only the lower triangular portion of the matrix, and this is what I am sending to
hclust to be clustered.
d= as.matrix(mat) hc =hclust(d, method="single")
However this is the error I get:
Error in if (n < 2) stop("must have n >= 2 objects to cluster") : argument is of length zero