I'm using Gnuplot 5.0.0 to plot multiple intersecting surfaces, which I have set to be transparent. However, I am also mapping some points to these surfaces to indicate how the surfaces are explored during the course of a calculation. The trouble is that the points are not easily visible as they have also been made transparent by the line
set style fill transparent solid 0.60 border
which makes everything in the plot transparent to the same extent. Using a Gnuplot tutorial on transparency (http://www.gnuplotting.org/filledcurves-with-different-transparency/), I tried the following to set the surface transparency independent of that of the points:
splot 'surffile' with pm3d palette fs transparent solid 0.60
But using this method, I get the error "unexpected or unrecognized token", so it seems to me that the the fs method of setting transparency is incompatible with splot.
Is there a way that I can make my surfaces transparent, whilst leaving the points on the surface opaque?
Edit: MCVE
set palette rgb 21,22,23
set pm3d depthorder border linetype -1 linewidth 0.5
splot 'dplgwp01' u 2:3:5 w points,\
'dplgwp01' u 2:3:4 w points,\
'pesd1' with pm3d palette fs transparent solid 0.60,\
'pesd2' u 1:2:3 with pm3d palette fs transparent solid 0.60
dplgwp01 contains data points that I want to remain opaque, whilst pesd1 and pesd2 are surfaces that I want to be transparent.
Related
I have a problem with plotting my data points with pm3d in gnuplot. In my data file, the points (2-dim domain) are not rectangular aligned, but parabolic as shown in this figure, where the data points are not aligned exactly above each other. My goal is to create a heatmap with pm3d for a specific xrange where the heatmap is continued to the borders of the selected xrange.
What I did:
Plotted the data set with pm3d using the following minimal code example:
set terminal qt
set xrange [-0.25:1.00]
set view map
splot "data.txt" u 1:2:3 with pm3d
What I got:
A heatmap of my data file, but with ugly corners at the border points at where I cut my x-domain, because the border points are not aligned "above" each other.
What I expected:
A heatmap where the "heat" values are continued to the real border of the domain as it is the case for a simple "with lines" plot, shown in this figure.
My attempts so far to achieve what I expected:
I tried several pm3d options, including the option clip1in, which only requires 1 clip of a "heat rectangle" to be inside the domain, but the result was that the corners are no laying outside of the domain, which doesn't solve the problem unfortunately.
Additional information:
OS: Ubuntu 20.04
$ gnuplot -V
gnuplot 5.2 patchlevel 8
If anybody knows how I achieve what I'm trying to do, it would be nice to share that knowledge!
Cheers!
Gnuplot 5.4 does offer this sort of smooth clipping on the z coordinate, but unfortunately that doesn't help because you want clipping on x in this case.
Here is an example of performing x clipping by manual intervention.
The complicated expression for the x coordinate is just to generate points
with a non-orthogonal grid.
xclip(x) = x > 6. ? 6. : x # clip x to maximum value of 6.
f(x,y) = sin(sqrt(x*x + y*y)) # some function to plot
set sample 21; set isosample 21
set view map
set xrange [-6 : 6]
unset key
set multiplot layout 1,2
set title "No clipping"
splot '++' using ($1+$2*$2/10.) :($2):(f($1,$2)) with pm3d
set title "Manual clipping at x=6"
splot '++' using (xclip($1+$2*$2/10.)):($2):(f($1,$2)) with pm3d
unset multiplot
I am trying to read coordinates of various points of the 3D surface (heatmap) created with pm3d. If I plot just the points in the 3D space with splot command, I can use hypertext to display their X, Y, Z coordinates interactively. But when I use pm3d command, hypertext seems not working. Is it possible to use simultaneously hypertext and pm3d?
Does this work for you?
f(a,b) = sin(a)*cos(b)
set xrange [-pi:pi]; set yrange [-pi:pi]
set samples 21; set isosamples 21
set pm3d
set pm3d depthorder
splot '++' using 1:2:(f($1,$2)):(sprintf("%.2g %.2g %.2g",$1,$2,f($1,$2))) \
with labels point lc "#FF000000" hypertext
That should give you a pm3d surface with hypertext labels at each vertex. The point lc "#FF000000" is to make the points transparent so they don't interfere with viewing the surface.
Hello fellow stackers,
So I am a gnuplot afficcionado and I keep trying to use gnuplot to draw all sorts of things (including molecules) using it. These days I decided that it would be awesome if I could draw polyhedran in it with this beautiful thining-edge occlusion effect that we see in the interactive javascript polyhedral images here. See how the backside of the polyhedron is drawn differently from the front side and how they change dynamically as you rotate the solid? How can I do that in gnuplot?
I agree that is a really nice representation. Gnuplot cannot currently do the equivalent of "draw the inside edges using thinner lines", but the combination of partial transparency and using the background color as the fill color for the faces creates almost the same effect.
# Generation of polyhedral vertices and faces not shown.
# Each face is an object of type polygon, e.g.
# set object 1 polygon from ... to ... to ...
# make all the faces semi-transparent
set for [i=1:20] object i fillstyle transparent solid 0.6 fillcolor bgnd border lw 2
# use pm3d depthorder sorting to render the objects
# NB: gnuplot version 5.3 required
set for [i=1:20] object i polygon depthorder
set xrange [-2:2]; set yrange [-2:2]; set zrange [-2:2]
set view equal xyz
set view 30,30,1.5
unset border
unset tics
unset key
unset label
splot NaN
Results shown below for a cube and for an icosahedron. You can rotate them interactively as with any other splot.
I am plotting a transparent surface using pseudofile '++' (gnuplot 5.2):
set isosample 100
set style fill transparent solid 0.65
splot [0:5][0:5] '++' u 1:2:(sin($1)*sin($2)) w pm3d
but it results in a plot with both lines around each tile of the surface.
I am not sure how to make these transparent as the tiles, or how to suppress them altogether. Using the noborder or any border option of set style fill does not seem to change the output at all.
EDIT: The problem is actually terminal dependent.
above plot is with the qt terminal using its built in export
png, jpg and gif have lines :
But if exported as vector graphics (svg or pdf), again the screen rendering will depend on the viewer used (okular no lines, acrobat reader 9 has them), with some renderers having no lines: check here how your browser behaves (firefox, chromium, epiphany on my linux box are all line-free)
Output of show pm3d:
pm3d style is explicit (draw pm3d surface according to style)
pm3d plotted at SURFACE
taking scans direction automatically
subsequent scans with different nb of pts are flushed from BEGIN
flushing triangles are not drawn
clipping: all 4 points of the quadrangle in x,y ranges
pm3d quadrangles will have no border
steps for bilinear interpolation: 1,1
quadrangle color according to averaged 4 corners
I am trying to plot two data series plotted in one graph (histogram) using gnuplot. One is Baseline data and other one is Optimized. The script looks like this currently.
n=50
max=0.07946462
min=0.0
reset
width=(max-min)/n #interval width
hist(x,width)=width*floor(x/width)+width/2.0 #function used to map a value
to the intervals
set term png #output terminal and file
set output "histogram.png"
set xrange [min:max]
set yrange [0:]
set style fill solid 0.5 #fillstyle
set termopt enhanced # turn on enhanced text mode
set xlabel "PowerDensity(mA/um2)"
set ylabel "Area(um2)"
set title 'Power Density Histogram'
plot 'power_density_oxili_sptp.txt' u (hist($2,width)):($1) smooth frequency
w boxes lc rgb"blue" title 'Baseline', 'power_density_oxili_sptp.txt' u
(hist($3,width)):($1) smooth frequency w boxes lc rgb"red" title 'Optimized'
The output of this will be as given
enter image description here
The problem here, I am not able to see baseline data (blue) completely,since it is hiding below the optimized data.Either I need to see both data or I need to plot histogram separately in the same graph.
Br
Sree
It looks like you want the two histograms to be transparent. For that you should set the transparent flag in your fillstyle (see help fillstyple):
set style fill transparent solid 0.5
In addition, you need to specify truecolor to get transparent areas from the standard png terminal (see help png):
set term png truecolor
Alternatively you can use the pngcairo terminal.