Hi All, I am using jasper reports for calculating average from a database table and appending the average to the timeseries chart properties series expression. In addition to the average, I want to calculate N percentile from the table and display the value for the N precentile. I tried to use subdataset, but it needs a seperate reset group. When new group for subdataset is mentioned, then exising fields,variables are shown as not found. Subreport also not helpful. Can anyone give me a correct solution for this? Please let me know if any further information is requred.