UnsplashのDustin Humesが撮影した写真
This post is following of the above post. In this post, I will do Hierarchical Clustering using R.
First, I make a matrix for clustering. I start with subsetting only year 2020 data.
Let's use summary() function to see summary statistics.
Then, I use scale() function to make variables standardized value.
You will see scaled matrix has mean 0, standard deviation 1 for all variables.
Now, I can use dist() function to calculate distance.
Next, I can use hclust() function for Hierarchical Culstering.
Finally, I can use plot() function to visualize Hierarchical Culstering result.
CHN(China) and IND(India) are clusterd as same group.
Let's to same procedures with the first year data, 1990.
I see some differences between 1990 and 2020, for example USA is only one in 1990 but in 2020, USA is clustered with BRA(Brasil). So I can see the world has changed since 1990 to 2020.
That's it. Thank you!
Next post is
To read from the 1st post,
