CODEWITHSUNDEEP
rdataframeerror-handlingmaps
Rhedavetester
Rhedavetester

Reputation: 75

How to resolve data must be a dataframe issue in R

I am new to R and I am trying to create a basic world map and I have tried a number of methods but my latest trial has given me a new error.

install.packages("mapdata")
install.packages("maps")
library(maps)
library(mapdata)
df1 <- data(world2MapEnv)
p <- ggplot(data = df1,
            aes(x = long, y = lat,
                group = group, fill = region))

p + geom_polygon(color = "gray90", size = 0.1) + guides(fill = FALSE)

I am getting an error under the first ggplot that says:

Error: `data` must be a data frame, or other object coercible by `fortify()`, not a character vector. Run `rlang::last_error()` to see where the error occurred.

How do I resolve this.

Thanks in advance.

Upvotes: 0

Views: 642

Answers (1)

Dr. Flow
Dr. Flow

Reputation: 486

ggplot already has map data stored. A basic map with ggplot can be drawn with this code:

 world_map <- map_data("world")
 ggplot(world_map, aes(x = long, y = lat, group = group)) +
 geom_polygon(fill="lightgray", colour = "black")

Upvotes: 1

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