x-axis doesn't have any numbers, how to fix this?

Question

I making a boxplot, where I've named the x/y-axis something. The problem is that on the x-axis there is nothing besides the label I've made. I expected it that there would be 3, 5, 10 & 17 under the boxes.

I've used this command to make the boxplot:

boxplot(HE.JF$Q[HE.JF$houseId==3], 
        HE.JF$Q[HE.JF$houseId==5], 
        HE.JF$Q[HE.JF$houseId==10], 
        HE.JF$Q[HE.JF$houseId==17], 
        col = c("red", "blue", "yellow", "pink"), 
        ylab ="Heat consumption (kW)", xlab="House")

What do you need? The sample data the 4 houses? How do I upload them? — Bob, Nov 06 '15 at 17:04
@Bob: http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example — harre, Nov 06 '15 at 17:20
Well, if you only want specific houses, it should be obvious to subset the data.frame: `boxplot(Q ~ houseId, data = HE.JF[HE.JF$houseId %in% c(3, 5, 10, 17),])` — Roland, Nov 06 '15 at 17:25

score 1 · Accepted Answer · edited May 23 '17 at 11:44

1

R does not print 3, 5, 10, 17 beneath the box plots, because it doesn't know the houseID.

This happens because you don't plot directly from HE.JF$Q (which you can do by use of a formula, as pointed out by @Roland in a comment above). Instead what you do is to plot four individual extracts from HE.JF$Q (like HE.JF$Q[HE.JF$houseId==3]).

If this is how you want to do it, you can add the names-argument to boxplot().

boxplot(HE.JF$Q[HE.JF$houseId==3], 
        HE.JF$Q[HE.JF$houseId==5], 
        HE.JF$Q[HE.JF$houseId==10], 
        HE.JF$Q[HE.JF$houseId==17], 
        col = c("red", "blue", "yellow", "pink"), 
        ylab ="Heat consumption (kW)", xlab="House", 
        names = c("3","5","10","17"))

edited May 23 '17 at 11:44

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answered Nov 06 '15 at 17:05

harre

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So if I want to make a boxplot with the 4 houses, I've to write `boxplot(?)` – Bob Nov 06 '15 at 17:25
I've updated the answer with your code to show you how to add the names argument. – harre Nov 06 '15 at 17:39

x-axis doesn't have any numbers, how to fix this?

1 Answers1