Concept 1: You don't install functions... you install packages that have 
functions in them. There is a function fviz_nbclust in factoextra.

Concept 2: Once a package is installed, you do NOT have to install it again, 
e.g. every time you want to do that analysis. Making the installation part of 
your script is not advised.

Concept 3: Typically we do use the library function with a package name at the 
beginning of every session where we want to use functions from that package. 
However, that is optional... you could also just invoke the function directly 
using factoextra::fviz_nbclust(...blahblah...). Having the library function 
shortens this and if the package is not installed it provides a clear error 
message that can be a reminder to the user to install the package.

Execute your code line by line and solve the first error you encounter by 
examining the error message and reviewing what that line of code is designed to 
do.

On January 16, 2019 11:00:07 AM PST, N Meriam <meriam....@gmail.com> wrote:
>Hello,
>I'm struggling to install a function called "fviz_nbclus".
>
>My code is the following:
>pkgs <- c("factoextra",  "NbClust")
>install.packages(pkgs)
>library(factoextra)
>library(NbClust)
># Standardize the data
>load("df4.rda")
>library(FunCluster)
>
>install.packages("fviz_nbclust")
>#fviz_nbclust(df4, FUNcluster, method = c("silhouette", "wss",
>"gap_stat"))
>
>Installing package into ‘C:/Users/DELL/Documents/R/win-library/3.5’
>(as ‘lib’ is unspecified)
>Warning in install.packages :
>  package ‘fviz_nbclust’ is not available (for R version 3.5.2)
>
>Best,
>Meriam
>
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>and provide commented, minimal, self-contained, reproducible code.

-- 
Sent from my phone. Please excuse my brevity.

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