CODEWITHSUNDEEP
rggplot2graphmaps
FluffySheep1990
FluffySheep1990

Reputation: 441

Error: ggplot2 doesn't know how to deal with data of class gg/ggplot

Hello I've been using R for around a year now but only in my spare time outside of work and I've encountered the following error whilst trying to create a graph on ggplot:

Error: ggplot2 doesn't know how to deal with data of class gg/ggplot

I see the error message when trying to create any of the 3 graphs below.

BookingData %>%
ggplot() %>%
geom_bar(mapping = aes(x = Destination))

BookingData %>%
ggplot() %>%
geom_bar(mapping = aes(x = Cost))

BookingData %>%
ggplot() %>%
geom_point(mapping = aes(x = Destination, y = Cost))

The data I'm analysing is:

str(BookingData)
'data.frame':   8583 obs. of  7 variables:
$ Person.URN  : int  4087 39748 294410 366031 692418 841419 1018069 46055 
253036 484387 ...
$ Booking.URN : int  9298 79548 548230 697854 1314354 1594476 1930719 91905 
472923 921033 ...
$ Destination : Factor w/ 15 levels "Australia","Denmark",..: 4 4 11 3 15 5 
1 1 4 15 ...
$ Continent   : Factor w/ 5 levels "Africa","Americas",..: 5 5 5 5 2 5 4 4 5 
2 ...
$ Product     : Factor w/ 3 levels "Accommodation Only",..: 3 3 3 3 2 3 3 2 
3 3 ...
$ Cost        : int  629 1047 454 798 676 1073 482 587 1217 532 ...
$ Booking.Date: Date, format: "2009-09-19" "2009-09-19" ...

Any help you can provide on why I'm seeing this error message and how I can correct it would be much appreciated.

Upvotes: 1

Views: 1417

Answers (1)

DJV
DJV

Reputation: 4873

Because I cannot reproduce your data, I'm using mtcars dataset. Your main mistake was the use of pipe (%>%) instead of + . In addition, I prefer to put the aes() (x\y axis) under the ggplot() and not under the other argument.

For example:

require(tidyverse)

df <- mtcars

df %>% 
  ggplot(aes(x = factor(vs))) +
  geom_bar()

df %>%
  ggplot(aes(x = mpg, y = disp)) +
  geom_point()

You can look here for more explanations and examples.

Upvotes: 2

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