Change font size of likert plot legend and value label arrangement

Question

The default font size of the likert plot of the HH package is small and I want to increase its size for reading. I also want to control the order of the labeling value of the legend.

To get my value labels to be ordered correctly I have had to recode my data as "1 Not Valuable", "2 Neutral", and "3 Valuable". I do not want to have the "1", "2", and "3" listed, and simply want it listed as "Not Valuable", "Neutral", and "Valuable", however, when I try and list the values as categorical variables, the value defaults to alphabetical order (e.g., "Neutral", "Not Valuable", "Valuable"). I want the values to be in the order "Not Valuable", "Neutral", "Valuable".

Here is my current code and data (a)

          Value
Age        1 Not Valuable 2 Neutral 3 Valuable
  18-25                 8         4          8
  25.01-35             17        12         22
  35.01-45             10        19         18
  45.01-55             11        15         22
  55.01-65             27        25         34
  65.01-93             37        40         30

age=likert(a, ylab='Age Category', main='AGE DISTRIBUTION', 
    as.percent=TRUE,  col=c('gray70', 'gray48', 'black'))

I have also tried using the "theme" function to control text size with the code:

+theme(legend.text=element_text(size=12))

However, I get the R error that states

could not find function theme

I have not found any information on controlling the order of value scale in the legend.

Answer 1

I had the same issue and had to use a command from the lattice package. Add this to your code:

auto.key.in = list(cex = 1.2)

adjusting the number to the font size you desire.

Answer 2

check ?likert.plot :

you can then use

plot (age, legend.position="right", group.order = a$Age)