[R] font sizes for row.names of dendograms

[Brett Stansfield]

Dear R
I recently performed a cluster analysis. It produced the dendogram no
problem but unfortunately the font size of the row.names were all cluttered
due to their large size
So I tried to change the font size using
plclust(cluster.results, labels=iris$specie, cex=0.8)

and R came back to me saying
Error in plclust(cluster.results, labels = iris$specie, cex = 0.8) : 
        unused argument(s) (cex ...)
>
what am I doing wrong here

brett stansfield