Framework: DD011 – dd011_v03
This is a dual-scale line chart. These line charts show trend, but they also show it in different units or in comparison with another type of data. The values are not shown because the trend is the most important message. The best practice for line charts is to use the axes as the value indicators, which is the exception to most chart types.
These charts are typically used to show only one line per y axix. You can add lines, however. Just be sure that you assign the new data to the primary (left) or secondary (right) axis so your data will plot correctly. Then also add a line legend.
Part of series: DD011 Data-Driven Charts 011 – Line Charts
Series Keywords: trend, ranking
Line charts illustrate trend. It's important that each line be distinctive. The template is set up so that each line will be a different color. The colors that are chosen first are those in your template's color palette. After those colors have been used, the graph will choose different colors for the remaining lines. You may want to reassign colors if they do not blend with your palette.
Be sure you choose a line labeling technique that is appropriate. First choice is to label on the outside end of the line. When space becomes a problem, label inside the line chart using leader lines. The last choice is to use a legend. See to009 for predrawn legends that you can use.
Refer to the tutorial for this series, the FAQ section for data-driven charts, and best practices for presenting data-driven material. The feature article for October 2006 also has information about working with data-driven charts.
Key search words: trend, ranking