I would like to increase the key symbol for filledcurves plot style. I can control the length using set key samplen <value> but not the height for it. I can reach the result wanted but the used way is cumbersome and depends both size plot and font used.
I used datafile.dat file
1 1270 834
2 1112 900
3 794 982
4 656 710
and this code
reset
set encoding utf8
set terminal pngcairo size 500,500 font "Segoe UI,10"
set output "boxes.png"
set key title "{/:Bold Auto key}" Left reverse samplen 2
set tics out nomirror
set xrange [0:5]
unset xtics
set palette defined (\
1 "dark-violet",\
2 "#009e73",\
3 "#56b4e9",\
4 "#e69f00"\
)
unset colorbox
set errorbars small
set macros
style = "solid 0.5 border lt -1"
set style fill #style
# -----------------------------------------------
posX = 0.55 # x position (at screen)
posY = 0.9 # y position (at screen)
shiftY = 0.035 # shift in y direction (from up to down)
sizeX = 0.020 # box width
sizeY = 0.012 # box height
set label "{/:Bold Manual key}" at screen posX, posY left offset 0,1.2
set obj rect center screen posX,posY-0*shiftY size screen 2*sizeX,2*sizeY fc ls 1 fs #style
set obj rect center screen posX,posY-1*shiftY size screen 2*sizeX,2*sizeY fc ls 2 fs #style
set obj rect center screen posX,posY-2*shiftY size screen 2*sizeX,2*sizeY fc ls 3 fs #style
set obj rect center screen posX,posY-3*shiftY size screen 2*sizeX,2*sizeY fc ls 4 fs #style
set arrow from screen posX-sizeX, posY-4*shiftY to screen posX+sizeX, posY-4*shiftY lw 3 nohead
set label "Method 1" at screen posX, posY-0*shiftY left offset 2,0.05
set label "Method 2" at screen posX, posY-1*shiftY left offset 2,0.05
set label "Method 3" at screen posX, posY-2*shiftY left offset 2,0.05
set label "Method 4" at screen posX, posY-3*shiftY left offset 2,0.05
set label "Reference" at screen posX, posY-4*shiftY left offset 2,0.05
# -----------------------------------------------
plot \
keyentry w filledcurves ls 1 title "Method 1",\
keyentry w filledcurves ls 2 title "Method 2",\
keyentry w filledcurves ls 3 title "Method 3",\
keyentry w filledcurves ls 4 title "Method 4",\
"datafile.dat" u 1:2:0 w boxes lc palette notitle,\
"" u 1:3:(0.5) w xerrorbars ls -1 pt -1 lw 3 title "Reference"
to do this plot
Is there another way to do this?
Is there another way? Yes, but it's a bit ugly. The height of the key sample is determined by the font size used for the key titles. You can abuse this by setting the key to use a large font and then overriding it for the actual text of each plot title.
The following example sets the key font to 20 point and uses enhanced text mode to reduce the size back to 10 point when composing the title text. You can ignore the complicated using and every bits, it's just a way of generating some fake data to plot.
set term pngcairo size 500,500 font "ArnoPro,10"
set output "boxes.png"
$DATA << EOD
5
2
4
3
1
EOD
set yrange [0:6]
set style fill solid 1.0 border lc "black"
set boxwidth 0.3
set key font "ArnoPro,20" enhanced
plot for [i=1:5] $DATA every ::(i-1)::(i-1) using (i):(column(1)) with boxes \
title sprintf("{/ArnoPro=10 Method %d}", i)
Based on the solution from #Ethan, you could also plot very thick dummy lines out of the range or with NaN.
plot for [i=1:5] NaN w l lw 13 lt i ti sprintf(" Method %d",i)
Code:
### enlarge height of key sample
reset session
$DATA << EOD
5
2
4
3
1
EOD
set yrange [0:6]
set style fill solid 1.0 border lc "black"
set boxwidth 0.3
set key samplen 2 reverse
plot for [i=1:5] $DATA every ::(i-1)::(i-1) using (i):(column(1)) with boxes \
title sprintf("Method %d", i), \
for [i=1:5] NaN w l lw 13 lt i ti sprintf(" Method %d",i)
### end of code
Result:
Disclaimer: I am new to Gnuplot, and I need to plot some "simple" things for my studies.
I want to plot a part of a polygon with some names and vectors added.
The picutre below was created with Euklid Dynageo, and I am now trying to create this with Gnuplot.
The biggest problem I am facing right now is the labeling u,v,w and adding the angles to the plot. I think I would use vectors and lines.
Do you now a 'simple' way to create this plot?
If you really need to use Gnuplot for this, you have to make it all manually by placing various objects, labels and arrows (keep in mind that complex plots will be cumbersome). A minimal example for two arrows and alpha_1, similar like in your example, could like like this:
# two arrows:
set arrow 1 from 0,0 to sqrt(2)/2,sqrt(2)/2
set arrow 2 from 0,0 to 1,0
# the alpha_1 symbol:
set label 1 '{/Symbol a}_1' at 0.2,0.1 front
# the filled yellow arc (from 0 to 45deg):
set style fill solid 1.0 border
set object 1 circle at 0,0 radius 0.2 arc[0:45] fc rgb "yellow"
# proper ratio, range, and plot 'something':
set xrange[-0.1:1.1]
set yrange[-0.1:1.1]
set size ratio 1
plot 1/0
Lookup the manual for possible object properties.
gnuplot is a very versatile plotting tool, but certainly not optimized for such tasks. For this type of drawing maybe Inkscape or others tools might be better choices, especially for interactive drawing by clicking, dragging and snapping.
And as #JackGlasshard already mentioned, of course you can do such graphs with gnuplot which will be rather time consuming if you do it manually.
Alternatively, you can facilitate the work if you use a "template".
Creating such a template probably only makes sense if you need to create more than one drawing.
Just for fun and feasibility, I tried to create such a template for general use to make such graphs easier.
For the input data you need 3 datablocks (without headers)
$Points: # no., x, y, label, xoff, yoff, pt, ps, color
you define: point number, x-coordinate, y-coordinate, point label, x-offset, y-offset, pointtype, pointsize, point color
$Vectors: # p1, p2, label, arrow, lw, dt, xoff, yoff, color
you define: first point number, second point number, label, arrowsstyle (-1=backhead, 0=nohead, 1=head, 2=heads), linewidth, dashtype, x-offset, y-offset, vector color
$Angles: # p1, p2, p3, r, label, aoff, roff, color
you define: 1st point number, 2nd point number (=angle center point), 3rd point number, radius, label, angular label offset, radial label offset, color
Now, you only have to change the data part of the script for your custom graph. In case you want to insert "invisible" vector starting or end points, simply set pointsize to 0 in $Points. The plotting of the variable arrowheads is a bit cumbersome because of the issue mentioned in this question.
For sure, more features and more flexibility can be added to the template. No warranty that the script is free of bugs. There is certainly room for improvements.
Update: (linewidth and dashtype added)
Since there is no variable linewidth (lw var) and no variable dashtype (dt var)
you have to plot each line separately in a for loop and every ::n::n.
Furthermore, I noticed that the order of variable pointsize (ps var) and and variable pointtype (pt var) apparently has changed from gnuplot 5.2 to 5.4. Not sure whether this intentional or a "bug".
The version below has the order for gnuplot 5.4.
Script:
### drawing sketch with points, vectors and angles
reset session
# no., x, y, label, xoff, yoff, pt, ps, color
$Points <<EOD
1 1 1 "" 0 0 5 1 0xff0000
2 10 2 V_{i-1} 0 0 5 1 0xff0000
3 15 10 V_i 0 0 5 1 0xff0000
4 4 12 X -1.5 0 5 1 0xff0000
5 14 16 V_{i+1} 0 0 5 1 0xff0000
6 5 20 "" 0 0 5 1 0xff0000
EOD
# p1, p2, label, arrow, lw, dt, xoff, yoff, color
# arrows: -1=backhead, 0=nohead, 1=head, 2=heads
$Vectors <<EOD
1 2 "" 0 1.0 1 0 0 0xff0000
2 3 "" 0 2.0 1 0 0 0x000000
3 5 "" 0 1.5 3 0 0 0x000000
4 2 w 1 1.0 1 1.0 0 0x000000
4 3 v 1 1.0 1 0 0.7 0x0000ff
4 5 u 1 1.0 1 0 0.7 0x000000
5 6 "" 0 1.0 1 0 0 0x000000
EOD
# p1, p2, p3, r, label, aoff, roff, color
# p2=angle center point
$Angles <<EOD
2 4 3 4.0 α_{i-1} 7.0 0.5 0xffcccc
3 4 5 4.5 α_i 3.0 0.7 0xffffcc
EOD
### end of data input
### start of template
# point/vector coordinates
px(n,m) = real(word($Points[int(word($Vectors[n],m))],2)) # x coordinate of point n
py(n,m) = real(word($Points[int(word($Vectors[n],m))],3)) # y coordinate of point n
vxd(n) = px(n,2)-px(n,1) # vector delta x
vyd(n) = py(n,2)-py(n,1) # vector delta y
vxc(n) = (px(n,2)+px(n,1))/2. # vector center x
vyc(n) = (py(n,2)+py(n,1))/2. # vector center y
lw(n) = real(word($Vectors[n],5))
dt(n) = int(word($Vectors[n],6))
# angles
as(n) = int(column(5)+2) # arrow style
ax(n) = real(word($Points[int(word($Angles[int(column(0)+1)],n))],2)) # angle center x
ay(n) = real(word($Points[int(word($Angles[int(column(0)+1)],n))],3)) # angle center y
set angle degrees
Angle(x0,y0,x1,y1) = (_dx=x1-x0, _dy=y1-y0, _L=sqrt(_dx**2 + _dy**2), _L==0 ? NaN : \
(_dy>=0 ? acos(_dx/_L) : -acos(_dx/_L) ))
a1(m) = Angle(ax(2),ay(2),ax(1),ay(1)) # starting angle
a2(m) = Angle(ax(2),ay(2),ax(3),ay(3)) # end angle
set style arrow 1 backhead filled # -1
set style arrow 2 nohead filled # 0
set style arrow 3 head filled # 1
set style arrow 4 heads filled # 2
set size ratio -1 # ensure same x- and y-ratio
set key noautotitle
set xrange [0:22]
set yrange [0:22]
set mxtics 5
set mytics 5
set grid x,y,mx,my
set style fill solid 0.5 border lc "black"
plot $Angles u (ax(2)):(ay(2)):4:(a1(0)):(a2(0)):8 w circles lc rgb var, \
'' u (ax(2)+($4*0.5+$7)*cos(0.5*(a1(0)+a2(0))+$6)): \
(ay(2)+($4*0.5+$7)*sin(0.5*(a1(0)+a2(0))+$6)):5 w labels font "Times New Roman,13" center, \
for [i=1:|$Vectors|] $Vectors \
u (px(i,1)):(py(i,1)):(vxd(i)):($4==-1?vyd(i):NaN):9 every ::i-1::i-1 w vectors lc rgb var lw lw(i) dt dt(i) filled backhead, \
for [i=1:|$Vectors|] '' \
u (px(i,1)):(py(i,1)):(vxd(i)):($4== 0?vyd(i):NaN):9 every ::i-1::i-1 w vectors lc rgb var lw lw(i) dt dt(i) filled nohead, \
for [i=1:|$Vectors|] '' \
u (px(i,1)):(py(i,1)):(vxd(i)):($4== 1?vyd(i):NaN):9 every ::i-1::i-1 w vectors lc rgb var lw lw(i) dt dt(i) filled head, \
for [i=1:|$Vectors|] '' \
u (px(i,1)):(py(i,1)):(vxd(i)):($4== 2?vyd(i):NaN):9 every ::i-1::i-1 w vectors lc rgb var lw lw(i) dt dt(i) filled heads, \
for [i=1:|$Vectors|] '' \
u (vxc(i)+$7):(vyc(i)+$8):3:9 every ::i-1::i-1 w labels font ",12" tc rgb var, \
$Points u 2:3:7:8:9 w p ps var pt var lc rgb var, \
'' u ($2+$5):($3+$6):4:9 w labels tc rgb var font ",12" left offset 1,0
### end of script
Result:
I have input file test.dat that contains
1 1
2 2
3 3
4 4
I wrote the script for gnuplot:
gnuplot <<EOF
set term png size 1000,1000;
set output "out.png";
set arrow from graph 0,1 to graph 0,1.1 filled
set arrow from graph 1,0 to graph 1.1,0 filled
set tmargin 5
set rmargin 20
set border 3
set tics nomirror
set grid
set xtics font "Verdana,14"
set ytics font "Verdana,14"
set nokey
set style line 1 lt 1 lw 3 pt 3 linecolor rgb "black"
set ylabel "Efficiency, %" offset 2,0,0 font "Verdana,14"
set xlabel "Cores, N" offset 0,0,0 font "Verdana,14"
func1(x) = x / 2
func2(x) = x * 2
plot "test.dat" u (func1($1)):(func2($2)) ls 1 smooth csplines;
EOF
But the error occurs when you try to start it:
gnuplot> plot "test.dat" u (func1()):(func2()) ls 1 smooth csplines;
line 0: invalid expression
The dollar signs are interpreted as starting a shell variable. Use column instead:
gnuplot <<EOF
set term png size 1000,1000;
set output "out.png";
func1(x) = x / 2
func2(x) = x * 2
plot "test.dat" u (func1(column(1))):(func2(column(2))) ls 1 smooth csplines;
EOF
I am attempting to use gnuplot to plot the off axis response of a loudspeaker in the range +/- 90 degrees. I have this working nicely, almost entirely as a result of Creating a microphone polar pattern plot in gnuplot
I would like to extend this so it presents the forward" 180 range only however I don't know how to do this & would appreciate some pointers.
This is my code so far
gnuplot <<EOF
set terminal pngcairo size ${WIDTH}/2,${HEIGHT}/2 font ',10'
set polar
set angle degrees
set size ratio 1
set tmargin 3
set bmargin 3
set style line 11 lc rgb 'gray80' lt -1
set grid polar ls 11
unset border
unset xtics
unset ytics
set xrange [-30:30]
set yrange [-30:30]
set key
r=1
set rrange [0:r]
set rtics 0.166 format '' scale 0
set label '0°' center at first 0, first r*1.05
set label '180°' center at first 0, first -r*1.05
set label '-90°' right at first -r*1.05, 0
set label '+90°' left at first r*1.05, 0
set for [i=1:5] label at first r*0.02, first r*((i/6.0) + 0.03) sprintf("%d dB", -30+(i*5))
unset raxis
set key outside top right
set style line 11 lw 2
set output '${PREFIX}_polar.png'
set multiplot layout 1,2 title "Circular Polar Response"
set title "Normalised"
plot '${PREFIX}_norm_polar_1000.txt' t '1k' w lp ls 11 lt 1 pt -1 , \
'${PREFIX}_norm_polar_2000.txt' t '2k' w lp ls 11 lt 2 pt -1 , \
'${PREFIX}_norm_polar_4000.txt' t '4k' w lp ls 11 lt 3 pt -1 , \
'${PREFIX}_norm_polar_8000.txt' t '8k' w lp ls 11 lt 4 pt -1 , \
'${PREFIX}_norm_polar_16000.txt' t '16k' w lp ls 11 lt 5 pt -1
set title "Unnormalised"
plot '${PREFIX}_polar_1000.txt' t '1k' w lp ls 11 lt 1 pt -1 , \
'${PREFIX}_polar_2000.txt' t '2k' w lp ls 11 lt 2 pt -1 , \
'${PREFIX}_polar_4000.txt' t '4k' w lp ls 11 lt 3 pt -1 , \
'${PREFIX}_polar_8000.txt' t '8k' w lp ls 11 lt 4 pt -1 , \
'${PREFIX}_polar_16000.txt' t '16k' w lp ls 11 lt 5 pt -1
EOF
the outcome is
the data looks like this (this is the 1k line in the example picture)
180 0.657067
172.5 0.6832
165 0.717767
157.5 0.7461
150 0.7747
142.5 0.806167
135 0.835633
127.5 0.865167
120 0.890533
112.5 0.918133
105 0.929633
97.5 0.9566
90 0.9632
82.5 0.9566
75 0.929633
67.5 0.918133
60 0.890533
52.5 0.865167
45 0.835633
37.5 0.806167
30 0.7747
22.5 0.7461
15 0.717767
7.5 0.6832
0 0.657067
Gnuplot gets confused if you use xrange and yrange setting which contradict the rrange setting. Thats probably why the yrange settings are ignored.
Then, you must also use set size ratio -1 in order to get the same scaling in x and yrange. When plotting only the upper two quadrants, you would get a wrong aspect ratio with set size square.
set terminal pngcairo font ',10'
set polar
set angle degrees
set size ratio 1
set lmargin 8
set style line 11 lc rgb 'gray80' lt -1
set grid polar ls 11
unset border
unset tics
set xrange [-1:1]
set yrange [0:1]
set size ratio -1
r = 1
set rtics 0.166 format '' scale 0
set label '0°' center at first 0, first r*1.05
set label '-90°' right at first -r*1.05, 0
set label '+90°' left at first r*1.05, 0
set for [i=1:5] label at first r*0.02, first r*((i/6.0) + 0.03) sprintf("%d dB", -30+(i*5))
unset raxis
set key outside top right
set output 'polar.png'
plot 'norm_polar_1000.txt' w lp ls 1 t '1k'
I have this points:
0.00049 1.509
0.00098 1.510
0.00195 1.511
0.00293 1.509
0.00391 1.510
0.00586 1.523
0.00781 1.512
0.01172 1.514
0.01562 1.510
0.02344 1.511
0.03125 1.510
0.04688 7.053
0.06250 7.054
0.09375 7.187
0.125 7.184
0.1875 7.177
0.25 7.207
0.375 16.588
0.5 24.930
0.75 39.394
1 56.615
1.5 77.308
2 84.909
3 89.056
4 88.485
6 88.678
8 89.022
12 88.513
16 88.369
24 88.512
32 88.536
48 87.792
64 87.716
96 87.589
128 87.608
192 87.457
256 87.388
And this gnuplot script:
#! /usr/bin/gnuplot
set terminal png
set output "lat_mem_rd.png"
set title "Memory Latency Benchmark (Stride 512)"
set xlabel "Memory Depth (MB)"
set ylabel "Latency (ns)"
set xtics rotate by 45 offset 0,-1
set xtics font "Times-Roman, 8"
set grid
set style line 1 lc rgb '#0060ad' lt 1 lw 2 pt 7 ps 1 # --- blue
plot "lat_mem_rd.dat" using (log($1)):2:xtic(1) smooth unique title "" with linespoints ls 1
which generates this graphic:
But i want to show the y values in the y label with one of the approximated values in those approximations, for example, for all of the values with x values between 3 and 256, the y label is set to just one, maybe 88.513 that corresponds to x=12 or other (or maybe the average of those points if its not very difficult)...
The same for x values between 0 and 0.02344 and for x values between 0.03125 and 0.1875.
This y values will substitute the values 10, 20, ..., 90.
Here is a modification of your script that might do what you want, if I understand you correctly:
set title "Memory Latency Benchmark (Stride 512)"
set xlabel "Memory Depth (MB)"
set ylabel "Latency (ns)"
set xtics rotate by 45 offset 0,-1
set xtics font "Times-Roman, 8"
set grid
a = ""; p = 0; nn = 1; nt = 37; d = 4; s = 0
f(x) = (x>p+d || nn >= nt)?(nn=nn+1, p=x, a=a." ".sprintf("%5.2f", s/n), n=1, s=x):(nn=nn+1, p=x, s=s+x, n=n+1)
plot "lat_mem_rd.dat" using 1:(f($2)) # Just to set array "a"
set ytics 0,0,0
set yrange [0:90]
set for [aa in a] ytics add (aa aa)
set style line 1 lc rgb '#0060ad' lt 1 lw 2 pt 7 ps 1 # --- blue
set terminal png
set output "lat_mem_rd.png"
plot "lat_mem_rd.dat" using (log($1)):2:xtic(1) smooth unique title "" with linespoints ls 1
This script produces this plot:
The strategy is to accumulate a sum of Y-values and calculate an average every time the Y-value increases by at least an amount d; these averages are stored in a string variable "a", which is looped over to set the ytic values before the final plot command. This way clusters of closely-spaced Y-values give rise to a ytic at their average value; I think that was what you wanted.