usrp/sps/: added min/avg/max summary image

- range: generate min/avg/max data from FFT files
- vizr: plot the output of "range"
- row: make "viz" keep the FFT output and use it to generate the summary

usrp/sps/vizr

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+usage()
+{
+	echo "usage: $0 [-f font] [-p png_file] prefix range_file" 1>&2
+	exit 1
+}
+
+
+font=
+term=
+output=
+
+while true; do
+	case "$1" in
+	-f)	[ "$2" ] || usage
+		shift
+		font=$1;;
+	-p)	[ "$2" ] || usage
+		shift
+		term="set term png"
+		output="set output \"$1\"";;
+	-*)	usage;;
+	*)
+		break;;
+	esac
+	shift
+done
+
+[ "$2" ] || usage
+[ "$3" ] && usage
+
+prefix=$3
+file=$2
+
+gnuplot -persist <<EOF
+$term
+$output
+
+set label "$prefix" at graph 0.03, graph 0.93 font "$font,22"
+
+set xrange [-2.5:2.5]
+set yrange [-70:0]
+
+set mxtics 10
+set mytics 2
+set grid
+
+set xlabel "MHz from nominal frequency of test wave"
+
+plot "$file" using 1:4 with lines title "max" lt 2, \
+  "$file" using 1:3 with lines title "avg" lt 3, \
+  "$file" using 1:2 with lines title "min" lt 1
+EOF