#!/bin/sh
# csv_destroyer
# RTH 11/01/07
#
# Sample program to show off the most common and useful function of SED
# Like AWK, SED reads in one line of the file at a time and allows you to fiddle
# * Unlike AWK, SED automatically prints to stdout for you to redirect *
#
# Note similarity of syntax to AWK:
#   sed 'regular expressions and substitutions' INPUT > OUTPUT

#    s/,/\t/g == Substitute/THIS/FOR THIS/Everywhere in the current line
# Think C style for newline, tab, etc. 
echo ""
echo "SED output, changing commas to tabs"
sed 's/,/\t/g' V1280Sco_csvhead.dat

# This is an example especially you can do snazzy things
# in awk, like change what it sees at the field separator.
# Also further proof that if you know C, you'll be fine.  AWK has printf as well
#   side note - reason this initially failed during my talk is that my laptop's
#   version of AWK does NOT accept %lf as a format statement as was originally 
#   written, but the version on comet does.  Ditto that ** failed on my laptop, 
#   while ^ raises exponents as expected.  Be careful!
echo ""
echo "AWK output, defining commas as field separators"
awk 'BEGIN {FS=","} {printf "%f\t%f\t%e\n",$1,$2,$3}' V1280Sco_csvhead.dat
echo ""