gnuplot /gallery / pressure slope
# Matthias in Karlsruhe contributed this nice multiplot example.
# The original script that generates FIG format file was changed into PS.
# output
set terminal postscript enhanced eps color solid
set output "pressureSlopes.eps"
# set spaging between titels of plot
set key spacing 2
# set data syle line
set style data l
# vertical lines
set arrow 1 from 0.15,-1.45 to 0.15,1 nohead lt 5
set arrow 2 from 0.3,-1.45 to 0.3,1 nohead lt 5
# text inside the graph
set label "aortic" at graph 0.19,0.15
set label "valve" at graph 0.19,0.05
set label "open" at graph 0.19,-0.05
#more than one plot
set multiplot
#set origin and size of first plot
set origin 0.0,0.5
set size 1.0,0.5
### upper graph
#y axis
set ylabel "normalized pressure P"
set xrange [0:1]
#x axis
set format x ""
unset xtics
unset xlabel
#y2 axis (this is a trick to achieve correct alignment)
set y2label " "
set y2range [0:1]
set y2tics (" " 0.17)
# plot
plot "pressureSlopes.dat" u ($1*0.01):(($3+$5)/140) t "Pa0" lt 5 lw 3,
"pressureSlopes.dat" u($1*0.01):($3/140) t "PWk" lt 8 lw 3
### lower graph
set origin 0.0,0.0
set size 1.0,0.5
#y axis
set ylabel "normalized Qin"
set ytics nomirror
#y2 axis
set y2range [*:*]
set y2label "scaled Pex"
set y2tics -0.2,0.2,1
#x axis
set xlabel "time [s]"
set xtics 0,0.1,1
set xtics nomirror
set format x
#no labels and arrows in second graph
unset arrow 1
unset arrow 2
unset label 1
unset label 2
unset label 3
# plot
plot "pressureSlopes.dat" u ($1*0.01):(($6/4)/100) t "Qin" lw 3,
"pressureSlopes.dat" u($1*0.01):($5/100) t "Pex" lt 9 lw 3
unset multiplot
