如何更改要在条形图中分组的因子

Question

I tried to do a barplot to a factorial anova dataset by using R. However, R automatically plots each bar corresponds to different columns of my dataset matrix. How can I do a barplot with each bar corresponds to different rows instead?

             High demand  Low demand  None
Difficult         934        739       465      
Easy              517        396       392

Answer 1

Try one of this:

barplot(as.matrix(ab_group),legend.text = TRUE,col=1:nrow(ab_group))
barplot(as.matrix(ab_group),legend.text = TRUE,
        beside=T,col=1:nrow(ab_group))
barplot(as.matrix(t(ab_group)),legend.text = TRUE,col=1:ncol(ab_group))
barplot(as.matrix(t(ab_group)),legend.text = TRUE,
        beside=T,col=1:ncol(ab_group))

The last one is here: