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342 kaklik 1 
#!/bin/bash
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file=$1
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t1=$2
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t2=$3
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[ "$t1" = "" ] && t1=0
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[ "$t2" = "" ] && t2=86400
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awk -v "t1=$t1"  -v "t2=$t2" '{
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   $1 %= 86400
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   if( $1 < t1) next
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   if( $1 > t2) exit
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   print
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}' $file > /tmp/nplot.$$
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echo "
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 set style data lines
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 set terminal png
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 set xlabel 'UT Seconds'
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 set size 1.4,0.6
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 set xrange [$t1:$t2]
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 set key outside below
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 plot '/tmp/nplot.$$' using (\$1):(\$5/2) title 'Anthorn',\
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      '' using (\$1):(\$6/2) title 'Skelton',\
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      '' using (\$1):(\$7*2) title 'Burlage',\
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      '' using (\$1):(\$4) title 'Le Blanc',\
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      '' using (\$1):(\$8*2) title 'Tavolara'
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 " | gnuplot