Afsnitsforfatter: Danielle J. Navarro and David R. Foxcroft

Bar graphs

Another form of graph that you often want to plot is the bar graph. Let us 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 exactly as written – including the single quote marks:[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 Exploration → Descriptives 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 figur 31.