R - How to make stacked bargraph for data over years with missing years

0
votes

Here is my plot in R: enter image description here

Here is the code that made the plot:

years <- c(1980, 1984, 1984, 1986, 1988)
pubs  <- c("book","book","poem","poem","book")
mypubs <- data.frame(years,pubs)
counts <- table(mypubs$pubs,mypubs$years)
barplot(counts,main="pubs per year",xlab="year",col=c("darkblue","red"),legend=rownames(counts))

This is time-series data, and there is no data for 1981, 1982, 1983, 1985 and 1987. The data is whether I read a book or a poem at any given time.

Is there a straightforward way to take mypubs and add holes for the missing years? I've tried doing a histogram plot, but I can't figure out how to make it reliably one bar for each year, and I can't figure out how to make a histogram do stacked colors.

2
rgraphing
I don't see any years with no data, you probably need to factorize the years in the original df. – mtoto
There is no data for the year 1991. The original DF had "Year" as a column, and had a "yes/no" column. I've edited the example to make this more clear. – vy32
please dput your data, instead of describing it. – mtoto
I have created a dramatically simpler example. – vy32
how do you expect to plot data not inside your data.frame ? – mtoto

2 Answers

1
votes

Extending Greg's answer from above, try this:

years <- c(1980, 1984, 1984, 1986, 1988)
pubs  <- c("book","book","poem","poem","book")
mypubs <- data.frame(years,pubs)

mypubs$years<-factor(mypubs$years, levels = as.character(1980:1990))

counts <- table(mypubs$pubs,mypubs$years)
barplot(counts,main="pubs per year",xlab="year",col=c("darkblue","red"),legend=rownames(counts))

The "factor" command with convert the years column into factors, while the optional "levels" will set the available levels

1
votes

Before you run your code, do something like:

mydata$B <- factor(mydata$B, levels=1990:2015)

Then run your code and you will see 0 counts for the years between 1990 and 2015 without data. Modify the code if you want a different range of years.