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.
Is this doable with Tableau?
What should I read?
I was just looking this up the other day. Here are two links:
http://public.tableausoftware.com/views/ParallelCoordinatesExample/ParallelCoordinatesExample
http://www.tableausoftware.com/support/forum/topic/parallel-coordinates-plot
If you need more help, post a packaged workbook with some sample data and folk(s) here will see what they can do with it.