Graphic drawing - gnuplot

Question

In the visual, 2 different graphics are given in a single frame (layout 1, 2).
Both graphs are constrained by y 0: 7.
Data concerning the graph of the column (phonon distribution) "" ZrSbTe.ph_THz "and xmax = 0.885990
The data concerning the 2nd column graph are “ZrSbTe.dos_THz” and 2: 1 (Total), 3: 1 (Zr), 4: 1 (Sb) and 5: 1 (Te) ie the y-axis in the 1st column graph in the file, other columns in the file are taken as the x-axis in the graph.
70% area was used for 1st Chart and 30% for 2nd Chart.
Let's get the same graph by paying attention to the colors.
Let's load the gnuscript and the output graphic by making a 2 page PDF.
x-coordinates of column labels (you specify y coordinates)
Γ = -0.01
X = 0.13
L = 0.20
T = 0.22
W = 0.251
R = 0.34
X1 = 0.38
Z = 0.50
Γ = 0.575
Y = 0.67
S = 0.715
W = 0.835

Answer 1

Your final goal could be split into many different questions and "how-to-dos",... too many without any code and specific question. Keep in mind, for every keyword you can type help <keyword> in the gnuplot console to get some information. Check the gnuplot homepage and the PDF manual in the local doc folder.
I assume you are new to gnuplot... check the following example as a starting point. If you have a specific question, please remember: questions always with code.
Code:
### split graph
reset session
$Labels <<EOD
Γ -0.01
X 0.13
L 0.20
T 0.22
W 0.251
R 0.34
X1 0.38
Z 0.50
Γ 0.575
Y 0.67
S 0.715
W 0.835
EOD
# create some random test data
N=100
set print $PH
do for [i=0:N] {
print sprintf("%g %g %g %g %g",-0.01+i*(0.835+0.01)/N, rand(0)*3, rand(0)*3+1, rand(0)*3+3, rand(0)*3+4)
}
set print $DOS
print "X Total Zr Sb Te"
do for [i=0:N] {
print sprintf("%g %g %g %g %g",-0.01+i*(0.835+0.01)/N, rand(0), rand(0)+1, rand(0)+2, rand(0)+3)
}
set print
# set lines
do for [i=1:|$Labels|] {
set arrow i from word($Labels[i],2),graph 0 to word($Labels[i],2), graph 1 nohead lw 1.5 front
}
set ylabel "Frequency / THz"
set key noautotitle opaque box
set colorsequence classic
set multiplot layout 1,2
set size 0.7,1
set bmargin 3
set rmargin 0
plot for [i=2:5] $PH u 1:i w l lc "dark-grey", \
$Labels u 2:(NaN):xtic(1)
set size 0.3,1
set origin 0.7,0
set lmargin 0
set rmargin -1
unset ylabel
unset tics
unset arrow
set xlabel "DOS"
plot for [i=2:5] $DOS u i:1 w l ti columnhead(i)
unset multiplot
### end of code
Result: