Section author: Danielle J. Navarro and David R. Foxcroft

Bar graphs

Another form of graph that you often want to plot is the bar graph. Let’s use the afl.finalists data set with the afl.finalists variable that I introduced in Mode. What I want to do is draw a bar graph that displays the number of finals that each team has played in over the time spanned by the afl.finalists data set. There are lots of teams, but I am particularly interested in just four: Brisbane, Carlton, Fremantle and Richmond. So the first step is to set up a filter so just those four teams are included in the bar graph. This is straightforward in jamovi and you can do it by using the Filters function that we used previously. Open up the Filters screen and type in the following:[1]

afl.finalists == "Brisbane" or afl.finalists == 'Carlton' or afl.finalists ==
'Fremantle' or afl.finalists == 'Richmond'

When you have done this you will see, in the Data view, that jamovi has filtered out all values apart from those we have specified. Next, open up the ExplorationDescriptives window and click on the Bar plot check box (remember to move the afl.finalists variable across into the Variables box so that jamovi knows which variable to use). You should then get a bar graph, something like that shown in Fig. 30.

Bar plot in jamovi, showing just four AFL teams

Fig. 30 Filtering to include just four AFL teams, and drawing a bar plot in jamovi


[1]jamovi uses the symbol == here to mean “matches”.