如何在 R 中重新排列 x 轴上的条形

Question

I am new to using R and would appreciate help on a code.

I am attempting to re-arrange the bars on the x-axis of my plot. Most sources I have seen provide ways to do this in ascending/ descending order, or alphabetically; or for ggplot (I need to use barplot).

My data table currently looks like this...

       Expected       Observed  
Avg       50             12 
Good      48             50 
Bad       77             82 
Worse     12             12

When I plot this table using the code

barplot(data.table, beside=T,
        ylim=c(0,100),
        col=c("blue", "red")
legend("topright", c("Expected","Observed"), pch=15, 
       col=c("blue","red"), 
       bty="n")

The x-axis of the bars Avg, Good, Bad, Worse are arranged in alphabetical order. I am trying to re-arrange them into the order of Bad, Worse, Avg, Good. It was suggested I turn these into factors, but I am met with an error every time I ty to do so saying... "$ operator is invalid for atomic vectors" Using the code

data.table$Expected<- as.factor(data.table$Expected)

and

data.table$Avg<- as.factor(data.table$Avg)

Using dput(head(daily)) results in:

structure(c(275.939393939394, 292, 57.0909090909091, 47, 90.3939393939394, 
80, 47.5757575757576, 52), .Dim = c(2L, 4L), .Dimnames = list(
    c("Expected", "Observed"), c("average", "best", "better", 
    "good")))

Any way to re-arrange these with code instead of turning them to factors?

Thank you!

Answer 1

Thank you for the reproducible example. I suggest you to add this code before plotting, which will reorder the columns in your data.

The order will then be: average, good, better, best.

data.frame<-data.frame[,c(1,4,3,2)]