Hi,

I'm really struggling with barplot

I have a data.frame with 3 columns. The first column represents an
"incident" type
The second column represents a "month"
The third column represents a "time"

Code for a sample data.frame

incidents <- rep(c('a','b','d','e'), each =25)
 months    <- rep(c(1,2), each =10)
 times     <-rnorm(100)

#  make my sample data

 DF        <-
data.frame(Incidents=as.factor(incidents),Months=as.factor(months),Time=times)

# now calculate a mean for the  "by" groups of incident type and month

 pivot <-
aggregate(DF$Time,by=list(Incidents=DF$Incidents,Months=DF$Month),FUN=mean,simplify=TRUE)

What I want to create is a bar plot where  I have groupings by incident type
( a,b,d,e) and within each group
I have the months in order.

So group 1 would  be  Type "a"; month 1,2;
     group 2 would  be  Type "b"; month 1,2;
     group 3 would  be  Type "d"; month 1,2;
    group 4 would  be  Type "3"; month 1,2;

I know barplot is probably the right function but I'm a bit lost on how to
specify groupings etc

TIA

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