我想获取数据框中城市的经度/纬度数据,并在我的框架中添加2列.我是R的新手,我不知道该怎么做.有人可以帮我这个
我的框架:
> data <- read.xlsx("example_city.xlsx", 1)
> data
City Country
1 Stockholm Sweden
2 Oslo Norway
3 Rome Italy
4 Rome Italy
5 Stockholm Sweden
6 Stockholm Sweden
7 Paris France
8 Paris France
9 Hamburg Germany
10 Paris France
11 Paris France