CODEWITHSUNDEEP
rggplot2
InspectorDanno
InspectorDanno

Reputation: 995

Filtering a dataset and making a ggplot

I'm trying to filter a dataset within ggplot(), and display a set of line charts for various countries with a population under 5 million.

I have the dataset locally saved to my computer, but I just put in the github address for convenience.

library(ggplot2)
load('https://github.com/inspectordanno/food_production_r/blob/master/countriesbyFood.rdata')

ggplot(countriesbyFood[countriesbyFood$Item=="Wheat and products" & 
                         countriesbyFood$POP_EST < 5000000, ]) +
  geom_line(aes(x = Year, y = Amount, color = Element)) + 
  facet_wrap(~Area)

I'm getting:

Error: Must request at least one colour from a hue palette.

Upvotes: 0

Views: 1056

Answers (1)

Ronak Shah
Ronak Shah

Reputation: 389047

Few changes in the code and it works for me after loading the data.

library(tidyverse)

countriesbyFood %>%
   mutate(POP_EST = as.numeric(as.character(POP_EST))) %>%
   filter(Item == "Wheat and products" & POP_EST < 5000000) %>%
   ggplot() + 
   geom_line(aes(x = Year, y=Amount, color=Element)) + 
   facet_wrap(~Area)

enter image description here

Upvotes: 1

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