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How to create stacked barplot using barplot function with each bar having unique color in R?
In a bar plot, each bar represents one category of a single categorical variable but in a stacked bar plot, the bars represent same categorical variable but each divided into sub-categories. If we want to have similar distribution of colors in each bar then col argument with barplot function can be used.
Example1
M1<−matrix(sample(c(1:5),20,replace=TRUE),ncol=4) M1
Output
[,1] [,2] [,3] [,4] [1,] 4 3 5 3 [2,] 4 2 1 4 [3,] 5 5 2 3 [4,] 3 2 2 4 [5,] 1 5 2 5
Example
barplot(M1,col=rep(c("white","green","red","blue","yellow"),5))Output
Example2
M2<−matrix(sample(c(26:30),20,replace=TRUE),ncol=4) M2
[,1] [,2] [,3] [,4] [1,] 28 27 27 29 [2,] 30 28 28 27 [3,] 28 28 30 29 [4,] 30 28 28 28 [5,] 26 28 29 30
Example
barplot(M2,col=rep(c("white","green","red","blue","yellow"),5))Output
Example
M3<−matrix(rpois(20,5),ncol=4) M3
Output
[,1] [,2] [,3] [,4] [1,] 6 8 4 5 [2,] 8 3 7 2 [3,] 5 4 4 2 [4,] 5 3 5 2 [5,] 6 5 2 3
Example
barplot(M3,col=rep(c("white","green","red","blue","yellow"),5))Output
Updated on: 07-Nov-2020
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