gnuplot: plotting single palette in multiplot mode - gnuplot

I would like to ask some help on the following topic:
The following code produces 3 plots (3 rows, 1 column) on the same page:
set terminal postscript color
set output "test.ps"
file="test.dat"
set palette rgb 33,13,10
set cblabel "[km]"
set cbtics 2.5, 5, 20 format "%.0f"
set lmargin at screen 0.08
set rmargin at screen 0.88
# BUILD FROM BOTTOM TO TOP #
TOP=0.92 #
DY = 0.27 # DIMENSION OF Y
set multiplot
set grid
set offset 0, 0, graph 0.05, graph 0.05
#unset colorbox
# BOTTOM GRAPH #
set xlabel "Second of the Week [s]"
set ylabel "Up [m]" offset 1.5
set ytics -0.7, 0.2, 0.4
set yrange[-0.75:0.35]
set tmargin at screen TOP-2*DY
set bmargin at screen TOP-3*DY
plot file u 1:12:3 notitle palette
# MIDDLE GRAPH #
set xtics format ''
unset xlabel
set ytics -0.3, 0.2, 0.8
set yrange[-0.35:0.75]
set ylabel "North [m]"
set tmargin at screen TOP-DY
set bmargin at screen TOP-2*DY
plot file u 1:11:3 notitle palette
# TOP GRAPH #
set title "test"
set ylabel "East [m]"
set ytics -0.7, 0.2, 0.4
set yrange[-0.9:0.25]
set tmargin at screen TOP
set bmargin at screen TOP-DY
plot file u 1:10:3 notitle palette
unset multiplot
The above code produces the following plot:
In the plots, the data are shown according to the distance from an origin. The distance is color coded and the palette used is plotted on the right of each graph.
My question would be:
- how do I obtain the same graph but with a single vertical palette on the right of the 3 plots? I want a single palette to be shown from the top of the first graph (East) to the bottom of the third graph (Up). This would allow me to enlarge the palette as well and would result in a cleaner plot.
Any help is greatly appreciated.

For the first one use
set colorbox user origin screen 0, screen 0.05 size screen XX, screen YY
Where you need to set XX and YY to fit the desired colorbox width and heigh of the three plots.
Then for the second two plots, just set
unset colorbox

Related

GNUplot stacked multiplot - Top plot does not align perfectly

I'm trying to make a stacked plot with GNUplot.
TMARGIN = 0.05
BMARGIN = 0.15
LMARGIN = 0.15
RMARGIN = 0.0
TCOORD=1-TMARGIN
BCOORD=1-BMARGIN
DY = 0.2
# Ratio
set size ratio 0.5
# Tics
unset xtics
unset ytics
# Multiplot
set multiplot layout 4, 1
unset key
unset title
# Global
set lmargin at screen LMARGIN
set rmargin at screen RMARGIN
# Plot 0
set tmargin at screen TCOORD; set bmargin at screen TCOORD-DY;
plot sin(x)
# Plot 1
set tmargin at screen TCOORD-DY; set bmargin at screen TCOORD-(2*DY)
plot sin(x)
# Plot 2
set tmargin at screen TCOORD-(2*DY); set bmargin at screen TCOORD-(3*DY)
plot sin(x)
# Plot 3
set tmargin at screen TCOORD-(3*DY); set bmargin at screen TCOORD-(4*DY)
set xlabel "xlabel"
plot sin(x)
With the script above I end up with the top plot not aligned to the others.
Out of ideas.
Grateful for any help.
Thanks in advance!
Edit: This is "Version 5.4 patchlevel 2" on Archlinux if relevant.
Your script tries to use three different methods to adjust the plot positions: set ratio, set multiplot layout, and set margin. They are fighting each other. If I understand the intent correctly, this can all be done in the multiplot layout command. If the 2:1 ratio is important, you may have to calculate the right margin manually and/or adjust the width of the output using the size parameter of set term.
# No extra stuff around the edges
unset xtics
unset ytics
unset key
unset title
# Multiplot
set multiplot layout 4, 1 margins screen 0.15, 1.0, 0.1, 1.0 spacing 0,0
# Plot 0
plot sin(x)
# Plot 1
plot sin(x)
# Plot 2
plot sin(x)
# Plot 3
set xlabel "xlabel"
plot sin(x)
unset multi

Four graphs in one picture

What is wrong please with this graph? I would like to plot four graph in one picture. It displays two graphs. I would like to have one legends with 3 titles, because there are three color used. Then I don't know how to write two titles - one for graphs in left and one for graphs in right.
I would like to have 4 differents plot 2x2 - I have 4 plot in script. I there is lots of mistake.
set tics out nomirror
set encoding iso_8859_1
unset xtics
set ylabel "{/:Italic F} [a. u.]" font "Segoe UI,12" offset 2,0
set ytics nomirror font "Segoe UI,12"
set lmargin screen 0.2 #levý prostor vedle graf
set rmargin screen 0.9 #pravý prostor vedle grafu
set multiplot layout 2,2
set bmargin screen 0.40
set key Left reverse out horiz
set format y "%.2f"
set key tc variable
set xrange [4272:4500]
set yrange [0.7:1.02]
set title "Title 1" font "Segoe UI,12"
set title "Title 2" font "Segoe UI,12"
plot \
x title "Fitted" with lines linecolor rgb "red" lw 1.5,\
x title "Measured" with lines linecolor rgb "black" lw 1.5
unset ytics
set y2tics
set link y2
unset ylabel
set y2label "{/:Italic F} [a. u.]" font "Segoe UI,12" offset 1,0
set tmargin screen 0.4 #posun horní čáry dolního graf
set bmargin screen 0.15 #posun dolní čáry dolního graf
unset key
set tics out nomirror
set xlabel "{/:Italic {/Symbol l}} ({\305})" font "Segoe UI,12"
set xrange [4272:4500]
set yrange [-0.05:0.03]
plot x title "Measured - fitted" with lines linecolor rgb "navy" lw 1.5
set margin
set margin
plot \
x title "Fitted" with lines linecolor rgb "red" lw 1.5,\
x title "Measured" with lines linecolor rgb "black" lw 1.5
set margin
set margin
plot x title "Measured - fitted" with lines linecolor rgb "navy" lw 1.5
I suggest you have a look at plots in the gnuplot online demo collection, in particular this one: custom_key.dem
That demo illustrates automatic placement of separate plots into a grid via the set multiplot layout command, and also illustrates construction of a single legend holding titles and information from the constituent plots. The online copy includes a copy of the commands that generated the plot. If you have trouble adapting that example to your own data, come back and show what you have tried so that people can make further suggestions.
I could see that you used some symbols from symbol font.
If you want, use set encoding utf8 option and write symbols is directly.
You could set font as a terminal option also.
For example: set terminal pngcairo size 800,600 font "Segoe UI,8" enhanced.
To help you to understand as margins screen works, take a look on this figure.
This grid divides the screen (size 800,600 on terminal command) each 10% (0.1 screen unit).
In order to have graphs with the same size and align them each other we have to set the margins of the individual graphs manually.
To make it more easy I used macros commands.
Below a complete example of how to create a 2×2 graph using the multiplot.
reset
set encoding utf8 # Encoding
set terminal pngcairo size 800,600 font "Segoe UI,8" enhanced # Terminal settings
set output "multiplot_2x2.png" # Output file name
set grid ls -1 lc "gray" # grid lines
set tics out nomirror # tics marks
# Line styles
set style line 1 lc "#e41a1c" # red
set style line 2 lc "#377eb8" # blue
set style line 3 lc "#4daf4a" # green
set style line 4 lc "#984ea3" # purple
# Margins for each row and column
Row1 = "set tmargin screen 0.90; set bmargin screen 0.56" # Top and bottom margins
Row2 = "set tmargin screen 0.42; set bmargin screen 0.08"
Col1 = "set lmargin screen 0.08; set rmargin screen 0.48" # Left and right margins
Col2 = "set lmargin screen 0.57; set rmargin screen 0.97"
# Multiplot option with main title
set multiplot layout 2,2 rowsfirst title "{/:Bold=12 Multiplot 2×2}"
# -------------------------------------------------------------------
#Row1; #Col1 # Calling the macros
set title "{/:Bold=10 Row 1, Col 1}" # Title for plot
set xrange [-10:10] # x-range
set yrange [0:50] # y-range
set xtics 2 # Increment for x-tics
set ytics 10 # Increment for y-tics
set xlabel "Crazy distance / Å" # x-label
set ylabel "Crazy values / a.u." # y-label
plot x**2 w l ls 1 title "x^{2}" # The plot
# -------------------------------------------------------------------
#Row1; #Col2
set title "{/:Bold=10 Row 1, Col 2}"
set xrange [-15:20]
set yrange [-4000:8000]
set xtics 5
set ytics 2000
set xlabel "Crazy temperature / °C"
set ylabel "Crazy pressure / Pa"
plot x**3 w l ls 2 title "x^{3}"
# -------------------------------------------------------------------
#Row2; #Col1
set title "{/:Bold=10 Row 2, Col 1}"
set xrange [-15:15]
set yrange [-0.4:1.2]
set xtics 5
set ytics 0.2
set xlabel "Crazy energy / kJ"
set ylabel "Crazy volume / m^{3}"
plot sin(x)/x w l ls 3
# -------------------------------------------------------------------
#Row2; #Col2
set title "{/:Bold=10 Row 2, Col 2}"
set xrange [0:14]
set yrange [-10:15]
set xtics 2
set ytics 5
set xlabel "Crazy value {/:Italic N}_{A} / 10^{23}"
set ylabel "Crazy property / cd sr kg^{−1} m^{−2} s^{3}"
plot cos(x)*x w l ls 4
# -------------------------------------------------------------------
unset multiplot
The result:
Exactly the same result can be achieved using approach on #Ethan's answer, with the advantage dismiss macros use, just write:
set multiplot \
layout 2,2 rowsfirst \
title "{/:Bold=12 Multiplot 2×2}" \
margins screen 0.08,0.97,0.08,0.90 \
spacing screen 0.09,0.14

Gnuplot Multiplot Individual Plot Sizes + Labels

I am currently trying to produce a decent multiplot in Gnuplot. Sadly I ran into some problems.
As the y-axis for both figures is the same I want to only label and tic it once, however I cant remove those from only the left plot.
Secondly I want to increase the width of the left plot while decreasing the one of the right.
Here is a picture of what I got so far, the code is below.
Plot so far
set term postscript eps enhanced color "Helvetica" 10
set output "dosband.eps"
set title "Bandstructure and Density of States"
#
set multiplot layout 1,2 \
margins 0.075,0.98,0.1,0.98 \
spacing 0.02,0.08 #margins: left,right,bottom,top; spacing: vertical, horizontal
set title "Bandstructure"
plot 'plotband.dat' using 1:2 with lines lt 1 lw 0.5 linecolor rgb "black" notitle
set xlabel "Density [states/eV]" #dont ask me why I have to swap the xlabels around
set ylabel "Energy [eV]"
#
set title "Density of States"
plot 'plotdos.dat' using 1:2 with lines lt 1 linecolor rgb "black" notitle
set xlabel "K-Points"
unset multiplot
Thanks in advance for any answers!
As noted by #Christoph, using explicit margins is one of the solutions. In your particular case, you could proceed as:
#dimensions are in screen units
width_left = 0.48
width_right = 0.25
eps_v = 0.12
eps_h_left = 0.1
eps_h_right = 0.05
unset key
set multiplot
set tmargin at screen 1. - eps_v
set bmargin at screen eps_v
set lmargin at screen 0.1
set rmargin at screen eps_h_left + width_left
set xr [0:1.4]
set xtics 0,0.2,1.4
set yr [-40:5]
unset ytics
set y2r [-40:5]
set y2tics in mirror
set format y2 "" #draw ticks but no tic labels
set title "Plot 1"
set xlabel "title 1"
plot 1/0
set lmargin at screen 1. - (width_right + eps_h_right)
set rmargin at screen 1. - eps_h_right
set xr [0:100]
set xtics 0,25,100
unset y2tics
set yr [-40:5]
set ytics in mirror
set mytics 1
set title "Plot 2"
set xlabel "title 2"
set ylabel "Energy [eV]"
plot 1/0
This produces:
In case the Energy [eV] label is supposed to be moved completely to the left, one can adjust the spacings/tics accordingly...

multiplot - stacking 3 graphs on a larger canvas

I have been trying very unsuccessfully to stack 3 graphs together in a multi-plot layout on a canvas that is a ratio of 2:3(width by height).
set terminal postscript eps enhanced "Helvetica" 24 color
set output "data.eps"
set timefmt "%s"
#set size 1.0,1.5
#set bmargin 2
#set tmargin 2
set size 1.0,1.5
set multiplot layout 3,1
set size 1.0,0.5
set tmargin 2
set bmargin 0
set ylabel 'Distance'
set format x ""
set ytics nomirror font "Helvetica,10"
set key top
plot "trace1.dat" using 1:3 axes x1y1 title "distances" with lines lw 2 lc rgb 'blue'
set size 1.0,0.5
set bmargin 0
set tmargin 0
set ylabel 'Power (W)'
set format x ""
set ytics nomirror font "Helvetica,10"
set key top
plot "trace2.dat" using 1:2 axes x1y1 title "device" with lines lw 2 lc rgb 'red'
set size 1.0,0.5
set bmargin
set tmargin 0
set xdata time
set ylabel 'Power (W)'
set xlabel 'Time (EST)' offset 0,-2.8 font "Helvetica,32
set format x "%b %d, %H:%M"
set ytics nomirror font "Helvetica,10"
set xtics nomirror rotate by 90 offset 0,-2.0 out font "Helvetica,10"
set key top
plot "trace3.dat" using 1:2 axes x1y1 title "aggr" with lines lw 2 lc rgb 'blue'
unset multiplot
When I do something like above, I get the plot shown below, there's a lot of blank space at the top of the canvas and the 3 multiplot graphs seem to overlap each other.
Any kind of help or pointer will be greatly appreciated.
In order to use a bigger canvas, you must use the size option when setting the terminal, e.g.:
set terminal postscript eps enhanced size 10cm,15cm
set size just changes the plot size relative to your canvas. To see this, consider
set terminal wxt
set size 1.0,1.5
plot sin(x)
Parts of the plot disappear, because it is much too high with respect to the canvas.
To stack three plots with same heights, in my opinion its best to use fixed margins:
set terminal pngcairo size 600, 900
set output 'stacking.png'
set lmargin at screen 0.15
set rmargin at screen 0.95
TOP=0.98
DY = 0.29
set multiplot
set offset 0,0,graph 0.05, graph 0.05
set xlabel 'time'
set ylabel 'ylabel 1' offset 1
set tmargin at screen TOP-2*DY
set bmargin at screen TOP-3*DY
set ytics -1000,500,1000
plot 1150*cos(x) title 'First'
set xtics format ''
unset xlabel
set ylabel 'ylabel 2' offset 0
set tmargin at screen TOP-DY
set bmargin at screen TOP-2*DY
set ytics -100,50,100
plot 101*sin(x) title 'Second'
set ylabel 'ylabel 3' offset -1
set tmargin at screen TOP
set bmargin at screen TOP-DY
set ytics -8,4,8
plot 10*sin(2*x) title 'Third'
unset multiplot; set output
The result is (with 4.6.3):
In order to avoid overlapping labels of the ytics, you must change the range where the tics are drawn, e.g. with set ytics -100,50,100, which puts ytics between -100 and 100 in steps of 50. Using set ytics rangelimited doesn't work
To increase the distance between the plot curve and the border, use set offset with graph coordinates, like done in the above script.
I started with the lowest plot, because only that has x labels and an xlabel.
You need to use set origin, too.
set terminal postscript eps enhanced
set output "data.eps"
set size 1.0,1.5
set multiplot layout 3,1
set size 1.0,0.5
set origin 0,1
...
plot ...
set size 1.0,0.5
set origin 0,0.5
...
plot ...
set size 1.0,0.5
set origin 0,0
...
plot ...
unset multiplot

Gnuplot Thick Curve Exceeds Plot Boundary

I've plotted the following in Gnuplot. My issue is that the curves exceed the boundary (so we can see that the purple and blue curves go beyond the y-axis). Any way to solve this problem? I'm hoping there is something that restricts drawing to inside the plotting area. Sure I can just plot less of the curve but that then looks weird. Ideally, I want Gnuplot to go around the frame of the curve and remove any bits of the curve that are there.
I've made the purple curve abnormally fat just to illustrate the problem. The problem is also there with the blue curve though.
The code to produce the above plot is:
#!/usr/bin/env gnuplot
### n: change this parameter to equal the number of data sets to be plotted
n = 2
# t: top margin in pixels
t = 25.0
# b: key height in pixels (bottom margin)
b = 25.0
# h: height of output in pixels
h = 150.0*n + t + b
### define functions to help set top/bottom margins
top(i,n,h,t,b) = 1.0 - (t+(h-t-b)*(i-1)/n)/h
bot(i,n,h,t,b) = 1.0 - (t+(h-t-b)*i/n)/h
### first set up some basic plot parameters
#set term cairolatex size 15cm,15cm
#set output 'DifferentialAmplifierPlot.tex'
set term pdfcairo size 15cm,15cm
set output 'DifferentialAmplifierPlot.pdf'
set border lw 4
set grid mxtics mytics xtics ytics ls '-1' ls '-1' lc rgb 'gray70', lc rgb 'gray90'
set mxtics
set mytics
# Make yrange > ytics > function to get padding.
set yrange [-1.5:1.5]
set ytics ("" -1.5, -1.25 1, -1.0, -0.75 1, -0.5, -0.25 1, 0.0, 0.25 1, 0.5, 0.75 1, 1.0, 1.25 1, "" -1.5)
set xtics 0,1,5
set xrange [0:5]
set xtics
set mxtics
set mytics
set format x ""
set grid xtics ytics mxtics mytics ls -1 ls -1 lc rgb 'gray60', lc rgb '#C0E5E5E5''
set multiplot layout (n+1),1 #font ",14" title 'Input And Output Voltages Of Differential Amplifier'
### First plot
# change only plot command here
currentplot = 1
set tmargin at screen top(currentplot,n,h,t,b)
set bmargin at screen bot(currentplot,n,h,t,b)
unset key
unset xlabel
set title 'Input (Bottom) And Output (Top) Voltages Of The Differential Amplifier'
set ylabel 'Voltage [V]'
plot 'DifferentialAmplfier.dat' using (1000*$1):2 with lines lw 20 lc rgb 'dark-magenta'
### Last plot
# change only plot command here
currentplot = currentplot + 1
set tmargin at screen top(currentplot,n,h,t,b)
set bmargin at screen bot(currentplot,n,h,t,b)
set format x
unset title
set xlabel 'Time [ms]'
set ylabel 'Voltage [mV]'
plot 'DifferentialAmplfier.dat' using (1000*$1):(1000*$3) with lines lw 10 lc rgb 'navy'
unset multiplot
set term x11
Questionable/Dodgy fix...
There is a way to do this but it is cumbersome. You would use a multiplot, plot your data, then through judicious use of the graph and screen coordinate systems plot white rectangles around your plot, then replot an empty plot to redraw the borders (because the rectangles will have overwritten your labels and half of the border line thickness). Here is an MWE:
#!/usr/bin/gnuplot -persist
reset
f(x) = sin(x)
xl=0; xh=20; yl=-1; yh=1;
set xrange [xl:xh]
set yrange [yl:yh]
set multiplot
plot f(x) not w l lt 3 lw 12
## overdraw borders on left, right, top, bottom
set object 1 rectangle from screen 0, screen 0 to graph 0, screen 1 behind \
fillstyle solid noborder
set object 2 rectangle from graph 1, screen 0 to screen 1, screen 1 behind \
fillstyle solid noborder
set object 3 rectangle from screen 0, graph 1 to screen 1, screen 1 behind \
fillstyle solid noborder
set object 4 rectangle from screen 0, screen 0 to screen 1, graph 0 behind \
fillstyle solid noborder
plot NaN not
unset multiplot

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