[R] Clustering function

From: N. Goodacre <ng296_at_cam.ac.uk>
Date: Wed 18 Jan 2006 - 05:14:48 EST


Dear mailing group,

  I have loaded an Excel file into R by calling it ".csv" and using the "read.csv" function in R. However then I want to use the (limma package specific, I believe) function "hclust", which clusters data in a tree dendrogram, by similarity. However, I receive the errors msg.s: 1) "missing observations in cov/cor" 2) "In addition: warning message: NAs introduced by coercion"

The excel file does have missing data slots. Do these tow messages mean that it has written "NA" where the missing slots were? Or is there a more fundamental error?

 thanks.

-Norman



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