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If I have a categorical variable in my data frame (eg list of 100 colours) and their count is 5000+, how do I count the number of red colours, number of blue colours etc and store them?

ponury-kostek
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user3565439
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  • Do you want to count how many of each existing color appears? table(df$color) would do it, assuming your data frame `df` has a column `color`. Or do want to categorize the 100 colors into more general types? – Jon Spring Sep 14 '18 at 06:16

2 Answers2

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Easiest way to do it using Base R is to use table function

df_new<-as.data.frame(table(df$color,df$count))

This will give you count by various colors.

Hunaidkhan
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tidyverse solution

library( tidyverse )
df %>% group_by( color ) %>% summarise( number = n() )
Wimpel
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