Update readme.md

readme.md

@@ -9,7 +9,7 @@
 - Run the commands listed in the following subsections to launch Son of Grid Engine (SGE) jobs to extract, group patches in HDF5 files and create a lookup table for every HDF5 file. 
 ## 1.2 Extract and group
 - qsub split_main.sh ./config_testing.txt  
+-- *split_main.sh* in turn submits *split_grp.sh* which in turns runs *split_grp.py* in array job fashion. Every task in the array job processes one slide.
 - qsub split_main.sh ./config_normal.txt  
 - qsub split_main.sh ./config_tumor.txt