如何映射R中的每个分类变量组合？(How do you map every combination of categorical variables in R?)

 使用R，有没有办法获取数据集并绘制出每个分类变量的每个可能组合？ 
 
 例如，假设我从在线商店获得了10,000行客户数据。 我想知道哪些购物者花的钱最多。 我从客户那里得到以下数据： 
 
 电子邮件（yahoo，gmail，hotmail，aol）浏览器（Mozilla，IE，Chrome，Opera）国家（美国，加拿大，中国，澳大利亚，埃及，韩国，巴西）每位用户在我的商店花了多少钱。 
 
 我想绘制出上述三个分类变量的每种可能组合，并看看每个客户的平均支出是多少。 
 
 在R中这样做的好方法是什么？ （注意：我的R经验现在很平均） 
 
 谢谢。 

Using R, is there a way to take a data set and map out every possible combination of every categorical variable? 
 
For example, let's say I had 10,000 rows of customer data from an online shop. I want to find out which shoppers spend the most money. I have the following data from the customer:
 
E-mail (yahoo, gmail, hotmail, aol) Browser (Mozilla, IE, Chrome, Opera) Country (USA, Canada, China, Australia, Egypt, S.Korea, Brazil) How much total money each user spent at my store.
 
I want to graph out every possible combination of the above three categorical variables and see what was the average spending of each customer.
 
What is a good way to do this in R? (note: my R experience is average right now)
 
Thanks.

原文：https://stackoverflow.com/questions/23020826