Perhaps somebody can explain to me if what I want is doable in Tableau.
I have test items for countries and years. By basic graph type is a line graph for the percentage solved for each test item.
The x-axes category is nominal, and I introduce the order of the items by decreasing percentage averaged across all countries. So I have well defined nominal x-Axis. I need parallel coordidate plots, comparing, say 2 countries for 3 periods each, so this would be 6 line charts. I have been unable to use the item category (=name) for the x-axis.