=======================
 tabstat.awk 
=======================
#!/usr/bin/gawk -f
#
#@ get stats on values in columns of tables
#
# tabstat.awk -v col=1,6 table.txt
# tabstat.awk    col=1,6 table.txt
#
# command line options 
#   [-v]  col=3,5,7        take values from column 3,5,7
#                          warning: value of col wil be evaluated before each 
#                          new file, but only the last value will be used
#
#
#   [-v] head=foo,bar,baz  headers for the selected columns
#   
#   [-v] quant=5,10,25,50,75,85,95   
#                          show quantiles (percentages in comma separated list)
#                          quant=""  : use default 5,10,25,50,75,85,95
#                          quant=" " : don't give quantiles
#
#   [-v] lineout           additionally print stats on a line
#