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gnuplot-script
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gnuplot-script
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#set style data histogram
#set style data linespoints
#set xtic rotate by -45 scale 0
set term png size 1024,768 large
set output "house-prices.png"
set ylabel "$"
set xdata time
set timefmt "%m/%Y"
set format x "%Y"
set title "Calgary Median House Prices\nsource: CREB data" offset 40,-4
set nokey
#set key bottom right box ls 1 spacing 2
## second arg is increment, given in seconds (monthly, roughly)
## setting this will give a label for every month; pretty busy
#set mxtics "01/2004", 2628000, "03/2011"
set mxtics 12
set xtic scale 2
#set linestyle 1 lt 1 pt 9 ps 0.7
#set linestyle 2 lt 3 lw 3
set style line 1 lt 1 lw 2 pt 4 ps 1
set style line 2 lt -1 lw 2 pt 4 ps 1
set arrow from "08/2007",487523 to "05/2007",487523 ls 3
set label "$487,523\nJune, 2007" at "09/2007",487523 textcolor lt 3
set label "2004-2005 best-fit\nextrapolated" at "11/2009",300000 textcolor lt 3
set arrow from "11/2009",300000 to "6/2009",300000 ls 3
plot 'real-estate-prices' using 1:2 title "median house price" linestyle 1 with lines,\
'real-estate-prices' using 1:2 title "median house price" linestyle 2 with points,\
'2004-05-trend' using 1:2 title "2004-2005 trend" linestyle 3 with lines