CODEWITHSUNDEEP
rcluster-analysis
T X
T X

Reputation: 613

Error in R when using cluster analysis ("hclust" function)

I want to do cluster analysis in R. So I create a distance matrix (Fig.1) below:

Fig.1

matrix_a <- data.frame(n1=c(0,1,11,5),n2=c(1,0,2,3),n3=c(11,2,0,4),n4=c(5,3,4,0))

Then I use the code below for cluster analysis:

result <- hclust(matrix_a,method="average")

However, an error occured:

Error in if (is.na(n) || n > 65536L) stop("size cannot be NA nor exceed 65536") : missing value where TRUE/FALSE needed

Could anyone help me check out where was I wrong?

Upvotes: 2

Views: 7412

Answers (1)

G. Grothendieck
G. Grothendieck

Reputation: 269586

In ?hclust the d argument is described as:

d
a dissimilarity structure as produced by dist.

The object matrix is not such an object. In fact it is not even an R matrix. It is a data frame.

Try the following. We have given a more accurate name to the input and then converted it to a dist object as required.

DF <- data.frame(n1 = c(0,1,11,5), n2 = c(1,0,2,3), n3 = c(11,2,0,4), n4 = c(5,3,4,0))
hclust(as.dist(DF), "ave")

Upvotes: 4

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