stacked bar plot in R

Question

Hello!

I have a table like it:

A    B    
1   55
1   43
2   55
1   89
3   55
4   43
4   55

I would like to count for each column the frequency of each categorical value and plot them like in figure.

How can I do it?

Thank you in advance

Answer 1

I suggest ggplot2 to get your barplot.

Check out this How to Make a Stacked Bar Chart in R Using ggplot2.

Read the ggplot docs and have a try.

By the way ,it's good for you to read how to ask.

Hope this helps.

Answer 2

I do not fully get how your table produces the plot you provide since both columns have equal values, and the plot has 9 vs 6 values.

With R base you could try:

df <- data.frame( A = c(1,1,2,1,3,4,4),
            B = c(55,43,44,89,55,43,55))

df2 <- data.frame(cat = rep(c("A","B"),each=nrow(df)), val = c(df$A,df$B))

barplot(as.matrix(table(df2$val,df2$cat)))

You would need some additional work on the data to get the colors between A and B similar. Since A and B have different types of values, the plot now has 6 different colors.