После прохождения этих курсов я уверенно создаю профессиональные визуализации и дашборды.
Shoebur RahmanСпециалист по закупкам, Giz Bangladesh
Описание курса
Learn How to Perform Cluster Analysis
Cluster analysis is a powerful toolkit in the data science workbench. It is used to find groups of observations (clusters) that share similar characteristics. These similarities can inform all kinds of business decisions; for example, in marketing, it is used to identify distinct groups of customers for which advertisements can be tailored.Explore Hierarchical and K-Means Clustering Techniques
In this course, you will learn about two commonly used clustering methods - hierarchical clustering and k-means clustering. You won't just learn how to use these methods, you'll build a strong intuition for how they work and how to interpret their results. You'll develop this intuition by exploring three different datasets: soccer player positions, wholesale customer spending data, and longitudinal occupational wage data.Hone Your Skills with a Hands-On Case Study
You’ll finish the course by applying your new skills to a case study based around average salaries and how they have changed over time. This will combine hierarchical clustering techniques such as occupation trees, preparing for exploration, and plotting occupational clusters, with k-means techniques including elbow analysis and average silhouette widths.DataCamp courses are comprised of a mixture of videos, articles, and practice exercises so that you have the chance to test and cement your new-found skills so that you feel confident applying them outside a course setting.
Предварительные требования
Программа
План курса
1
Calculating Distance Between Observations
Cluster analysis seeks to find groups of observations that are similar to one another, but the identified groups are different from each other. This similarity/difference is captured by the metric called distance. In this chapter, you will learn how to calculate the distance between observations for both continuous and categorical features. You will also develop an intuition for how the scales of your features can affect distance.
- What is cluster analysis?50 XP
- When to cluster?50 XP
- Distance between two observations50 XP
- Calculate & plot the distance between two players100 XP
- Using the dist() function100 XP
- Who are the closest players?50 XP
- The importance of scale50 XP
- Effects of scale100 XP
- When to scale data?50 XP
- Measuring distance for categorical data50 XP
- Calculating distance between categorical variables100 XP
- The closest observation to a pair50 XP
2
Hierarchical Clustering
This chapter will help you answer the last question from chapter 1—how do you find groups of similar observations (clusters) in your data using the distances that you have calculated? You will learn about the fundamental principles of hierarchical clustering - the linkage criteria and the dendrogram plot - and how both are used to build clusters. You will also explore data from a wholesale distributor in order to perform market segmentation of clients using their spending habits.
3
K-means Clustering
In this chapter, you will build an understanding of the principles behind the k-means algorithm, learn how to select the right k when it isn't previously known, and revisit the wholesale data from a different perspective.
4
Case Study: National Occupational Mean Wage
In this chapter, you will apply the skills you have learned to explore how the average salary amongst professions have changed over time.
R
Cluster Analysis in R
Курс
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