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31 lines
511 B
Bash
Executable File
31 lines
511 B
Bash
Executable File
#!/bin/sh
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usage()
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{
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echo "usage: $0 [-o pngfile] file ..." 1>&2
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exit 1
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}
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if [ "X$1" = X-o ]; then
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out=$2
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shift 2
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fi
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[ "$1" ] || usage
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[ "${1#-}" = "$1" ] || usage
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gnuplot -persist <<EOF
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`[ "$out" ] && ( echo set term png\;; echo set output \'$out\'; )`
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set xlabel "MHz"
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set ylabel "dB"
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set xrange [2402:2483]
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set yrange [-35:-25]
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set title "Received signal strength"
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set data style errorlines
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plot \
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`for n in $@; do
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echo -n $comma \'$n\' title \'${n%%.*}\'
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comma=,
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done`
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EOF
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