percentages in bar chart

Hey all

I am a NB to BIRT and have a question about how the best method is to add percentages on a bar chart.

Problem : I have a stacked bar chart with values per month

2011, November |

|
2011, December |--x2--|

|

In place of displaying labels as x1 and y1, I would like to display : x1 / ( x1 + y1), y1 / (x1 + y1), ...

I'm aware of "Percentile Value Data" in "Series Labels" but it computes percentages per serie not "per line".

Any idea ?

Birt 3.7.1

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Comments

mwilliams

Is a stacked percentage chart not something that will work for you? Let me know.

jfr

Hi, I'm back with with my problem. And yes, stacked percentage chart is something that work in many cases. But, is it possible to get percentages "per line" and not per serie ? I tried to use the beforeDrawDataPointLabel function but without sucess since I don't understand how to get all the values for a given line and then the sum to get the percentage. Thx for the help.

mwilliams

You can grab all the values in afterDataSetFilled or in the beforeGeneration and use the values to compute your label values. If you create a sample report using the sample database or another way that I can run the report, I can try to help you modify the design to get what you're wanting.

jfr

Ok, thx very much for the help. I did use afterDataSetFilled and now display percentages 'per line' as wanted. jfr

mwilliams

Great to hear! Let us know whenever you have questions!