Here's his script, as written:
#!/bin/sh
# copyright(c) j. kotecha 2004 -- http://www.vidia.com/
# this file may be used without fee as long as the copyright
# notice is kept the program is is "as is" and not warranted
# for any purpose. Use at your own risk
M="0"
s="0"
v="0"
d="0"
if [ $# -eq 0 ]; then
exit 1
fi
if [ $1 = "-m" ]; then
M=$2
shift 2
else
M=0
fi
list=$*
count=$#
for i in $*
do
d=`scriptbc -p 9 $i - $M`
v=`scriptbc -p 9 $d \* $d`
s=`scriptbc -p 9 $s + $v`
done
std="`scriptbc -p 9 $s / $count`"
std="`scriptbc -p 9 sqrt \( $std \)`"
echo $std
The script itself could be fine-tuned a bit, but the important thing to see here is that
Wicked Cool Shell Scripts really
does enable readers to get more out of the command line and shell scripting environment, to create scripts and commands that they otherwise wouldn't have been able to create.
Great job, Josh!
Related Shell Script Programming articles:
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