This object designed to be both the structure that holds data during the execution of the walker, as well as the object that properly formats and emits the data so that it can be easily loaded into R. In the end, you get a table that looks like this:
##:GATKReport.v0.1 ErrorRatePerCycle : The error rate per sequenced position in the reads
cycle errorrate.61PA8.7 qualavg.61PA8.7
0 0.007451835696110506 25.474613284804366
1 0.002362777171937477 29.844949954504095
2 9.087604507451836E-4 32.87590975254731
3 5.452562704471102E-4 34.498999090081895
4 9.087604507451836E-4 35.14831665150137
5 5.452562704471102E-4 36.07223435225619
6 5.452562704471102E-4 36.1217248908297
7 5.452562704471102E-4 36.1910480349345
8 5.452562704471102E-4 36.00345705967977
...
A GATKReport object can hold multiple tables, and the write() method will emit all tables in succession. Each table starts with its own ##:GATKReport.v0.1 table header, so each table can stand alone. This allows for tables to be mixed and matched in a single file, or for the output from different walkers to be combined into a single file with no ill effect.
The display property of individual columns can be turned off. This is useful when a column is used to store intermediate results, necesary for the computation of some later value, but the contents of the intermediate column itself are not required in the final output file.
Finally, the GATKReportTable allows for some simple, mathematical, element-wise and column-wise operations. For instance, two whole columns can be divided, the results of the operation being stored in a third column. This mimics the most basic of R operations, where whole vectors can be added, subtracted, multiplied or divided without requiring the developer to explicitly write a loop.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@4159 348d0f76-0448-11de-a6fe-93d51630548a
kiran