如何从 shapefile 中选择特定区域？

Question

I have the present shapefile

heitaly<- readOGR("ProvCM01012017/ProvCM01012017_WGS84.shp")

FinalData<- merge(italy, HT, by.x="COD_PROV", by.y="Domain")

But I'm interesting not on all Italy, but also same provinces. How can I get them?

Answer 1

There are many ways to select a category into a shapefile. I don't know for what do you want. For example if it is to colour a specific region in a plot or to select a row from shapefile attribute table.

To plot:

plot(shape, col = shape$column_name == "element") # general example

plot(heitaly, col = heitaly$COD_PROV == "name of province") # your shapefile

To attribute table:

df <- shape %>% data.frame This will give you the complete attribute table

row <- shape %>% data.frame %>% slice(1)

This will give you the first row with all columns. If you change the number 1 to another number, for example 3, will give you the information for row number 3

I hope have been useful