set multiplot
set nodisplay
width=9
gold_ratio = 1/((1+sqrt(5))/2)
set width width

# Plot 0 (bottom left)
f(x)[-2:7] = sin(x)

set xlabel 'x'
set ylabel 'y'
set xrange [-10.9:10.9]
set label 1 '(a)' -9,0.8
plot f(x)

# Plot 1 (bottom right)
g(x,a)      =  a/10
g(x,a)[:-a] = -a/10
g(x,a)[a:]  = -a/10

set ylabel 'linkaxis 0'
set label 1 '(b)' -9,0.8
set origin width,0
set key bottom xcentre
plot g(x,2), g(x,5), g(x,7)

# Plot 2 (top left)
h(x,y) = 1
h(x,y)[1:][1:] = x*y
h(x,y)[1:][:1] = x
h(x,y)[:1][1:] = y

set nokey
set xlabel 'linkaxis 0'
set ylabel 'y'
set yrange [0.1:25]
set label 1 '(c)' -9,22
set origin 0,width*gold_ratio
plot h(x,cos(x)+1) w l

# Plot 3 (top right)
set xlabel 'linkaxis 1'
set ylabel 'linkaxis 2'
set label 1 '(d)' -9,22
set origin width,width*gold_ratio
plot h(x,min(tan(x),10)) w l

set display
refresh