R cluster analysis and dendrogram with correlation matrix

Question

I have to perform a cluster analysis on a big amount of data. Since I have a lot of missing values I made a correlation matrix.

corloads = cor(df1[,2:185],          


        

Answer 1

I'm happy to learn about the kgs function. Another option is using the find_k function from the dendextend package (it uses the average silhouette width). But given the kgs function, I might just add it as another option to the package. Also note the dendextend::color_branches function, to color your dendrogram with the number of clusters you end up choosing (you can see more about this here: https://cran.r-project.org/web/packages/dendextend/vignettes/introduction.html#setting-a-dendrograms-branches )