Dataset with sums - Renderer with percentages?

rpitting · Post by **rpitting** » Tue Oct 23, 2007 11:19 am

I am analyzing the the results of anual surveys.

My DefaultCategoryDataset contains the answers as rows, and the years as columns.

Each field in the table contains the absolute values (sums), i. e. the number of persons who selected this answer.

So in my case, "66" doesn't mean "66%" (as usually imposed by JFreeChart), but "66 people of all the participants".

My questions: the Vertical BarChart displaying the results should automatically convert the sums from the data to percentages in the display.

As I still want to keep track of the absolute values, I would like to have them shown in the tooltip of each chart segment.

How do I achieve my goals?

Thank you in advance,

Reiner

dtopolsek · Post by **dtopolsek** » Tue Oct 23, 2007 12:34 pm

i think there's valueToPercent(args) method. and if you want to keep value as a tooltip, well keep the value in separate variable and setTooltip(value) if there's such method

hope it helps

rpitting · Post by **rpitting** » Tue Oct 23, 2007 2:42 pm

dtopolsek wrote:hope it helps

Unfortunately not: I could not find the method you mention.

Any other guesses?

Post by **david.gilbert** » Wed Oct 24, 2007 10:46 pm

Create a StandardCategoryItemLabelGenerator with a "{3}" in the format string...this will be replaced by the percentage.