Question

How do i tell ggplot to to plot points only if count is greater than X. I know this should be easy but i couldnt figure it out. something like

ggplot(items,aes(x=itemname,y=..count..))+geom_bar(y>X)

Answer 1

If I understand your question correctly (you haven’t provided example data), the easiest way is to generate your the data frame you want to plot outside of ggplot. So

##Example data
items = data.frame(itemname = sample(LETTERS[1:5], 30, replace=TRUE))
##Use table to count elements
items_sum = as.data.frame(table(items))

Then plot

X = 4
ggplot(items_sum[items_sum$Freq > X,], aes(x=items,y=Freq)) + 
    geom_bar(stat="identity")