Help with Cluster Tutorial Error

I'm not getting any error on that line in Windows 10. I did not try
running anything past that line.

Have you tried restarting R and clearing your environment?

----------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77843-4352

-----Original Message-----
From: R-help <mailto:r-help-bounces at r-project.org> On Behalf Of Bill Poling
Sent: Friday, February 15, 2019 7:37 AM
To: r-help (mailto:r-help at r-project.org) <mailto:r-help at r-project.org>
Subject: [R] Help with Cluster Tutorial Error

sessionInfo()
#R version 3.5.2 (2018-12-20)
#Platform: x86_64-w64-mingw32/x64 (64-bit)
#Running under: Windows >= 8 x64 (build 9200)

Hello I am working through this tutorial
https://www.r-bloggers.com/10-tips-for-choosing-the-optimal-number-of-clusters/
And I run into an error almost immediately at the point below like
this:

mammals <- raw_mammals %>% select(-name) # set rownames
#Error in select(., -name) : object 'p_links' not found

I have googled the error " R object 'p_links' not found"
https://stats.stackexchange.com/questions/113907/error-object-descr-not-found
However, the links I have found seem to be specific to an object that
has been declared by the Op, and in my case I do not know where this
object is supposed to be coming from?

I think this stems from the use of the dplyr Pkg?

https://dplyr.tidyverse.org/reference/select.html

Here is what I have so far:

#Data Set
# I will be using a lesser known data set from the cluster package:
all.mammals.milk.1956, one which I haven't looked at before.
#
# This small dataset contains a list of 25 mammals and the constituents
of their milk (water, protein, fat, lactose, ash percentages) from John
Hartigan, Clustering Algorithms, Wiley, 1975.
#
# First let's load the required packages. Some of these are already in
my library, those that are not were installed

library(tidyverse)
library(magrittr)
library(cluster)
install.packages("cluster.datasets")
install.packages("NbClust")
install.packages("clValid")
install.packages("ggfortify")
install.packages("clustree")
install.packages("ggiraphExtra")
library(cowplot)
library(cluster.datasets)
library(NbClust)
library(clValid)
library(ggfortify)
library(clustree)
library(ggiraphExtra)
library(dendextend)
library(factoextra)
library(FactoMineR)
library(corrplot)
library(GGally)
library(knitr)
library(kableExtra)


data("all.mammals.milk.1956")
raw_mammals <- all.mammals.milk.1956
str(raw_mammals) #----------------------KNOW THY DATA

# 'data.frame':25 obs. of 6 variables:
# $ name : chr "Horse" "Orangutan" "Monkey" "Donkey" ...
# $ water : num 90.1 88.5 88.4 90.3 90.4 87.7 86.9 82.1 81.9 81.6 ...
# $ protein: num 2.6 1.4 2.2 1.7 0.6 3.5 4.8 5.9 7.4 10.1 ...
# $ fat : num 1 3.5 2.7 1.4 4.5 3.4 1.7 7.9 7.2 6.3 ...
# $ lactose: num 6.9 6 6.4 6.2 4.4 4.8 5.7 4.7 2.7 4.4 ...
# $ ash : num 0.35 0.24 0.18 0.4 0.1 0.71 0.9 0.78 0.85 0.75 ...

#raw_mammals <- fread("Animal Milk Constituent
Percentages.csv",header=TRUE, stringsAsFactors=TRUE)

# subset dataset
mammals <- raw_mammals %>% select(-name) # set rownames
#Error in select(., -name) : object 'p_links' not found <--The Error

I hope this is enough information to help answer my question.

Thank you

WHP




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