How to transpose the results of Depth-of-Coverage?

I use the GATK Depth-of-Coverage function output for multiple samples below. but when I open the output file, I found the format is transponse as what I want. I wants the output file row: capture region,and the column are samples data. what can I do? thanks

./xhmm --mergeGATKdepths -o ./DATA.RD.txt \
--GATKdepths group1.1_50M.DATA.sample_interval_summary \
--GATKdepths group1.2_50M.DATA.sample_interval_summary \
--GATKdepths group1.3_50M.DATA.sample_interval_summary