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Groups > comp.graphics.apps.gnuplot > #4506

Generate `surf`-like plot from `scatter` base

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Hi everyone,

firstly, I'm quite new to GNUPlot (Just subscribed to this group :) ), so I do apologise if I might sound silly.

 I need to visualise some 3D data.

I'd like to show you all a graphical example of what I have put in place, but I don't see how to do it (maybe it is not possible?).

If you'd want to, here's the SO link where I posted the same question:
https://stackoverflow.com/questions/75084396/gnuplot-generate-surf-like-plot-from-scatter-base

I try to explain (tough very hard to transmit) by words (or go to the link for a better understanding/visualisation).

I now generate a scatter-like plot, meaning I have the whole list oh (x, y, z) values for all points.

Is there a way to finally visualise data layed down like that as a surf-like plot, WITHOUT HAVING TO GENERATE A GRID-MESH ?

Thanks to everyone answering.

Michele

The script I have up to know:
```
# Main window settings
MAINFONT    = ""
WINDOWTITLE = "BRM (mesher)"
WSIZEW = 3040 # base: 1980
WSIZEH = 2080 # base: 1080
set term wxt \
   size WSIZEW, WSIZEH \
   position 50, 50 \
   font MAINFONT title WINDOWTITLE


#
# commands taken from GNU demo folder
#

# unset hidden3d
# set parametric
set view 45, 45
set border linestyle 102 linewidth 2


# draws a grid in the XY plane (at the base)
# set style line 102 lc rgb "#d6d7d9" lt 0 lw 1
set grid back ls 102


#
# setting styles
#

LINETYP = 8
LINEWDT = 2
POINTTY = 7
POINTIN = 0
POINTSZ = 1

#                              "#AARRGGBB"
set style line 1 linecolor rgb "#B5000000" \
   linetype LINETYP linewidth LINEWDT \
   pointtype POINTTY pointinterval POINTIN pointsize POINTSZ

set style line 2 linecolor rgb "#B5EEEEEE" \
   linetype LINETYP linewidth LINEWDT \
   pointtype POINTTY pointinterval POINTIN pointsize POINTSZ
set style data points


# #
# # LEGEND (related)
# #
# LEGENDTITLE = "brm"
# set key nobox \
#    title LEGENDTITLE

#
# Annotation: title and labels
#
FIGURETITLE = "Bispectrum (MESHER)"
XLABEL = "f_1"
YLABEL = "f_2"
set title FIGURETITLE
set xlabel XLABEL
set ylabel YLABEL

# ??
set ticslevel 0.1


#
# RANGES
#
_xrange  = 0
_yrange  = 0

_xrangev_min = -0.58
_xrangev_max =  0.58
if (_xrange == 0) \
   set autoscale x; \
else \
   set xrange [_xrangev_min : _xrangev_max]

_yrangev_min = -0.58
_yrangev_max =  0.58
if (_yrange == 0) \
   set autoscale y; \
else \
   set yrange [_yrangev_min : _yrangev_max]


# by default, always autoscale Z axis
set autoscale z

#
# PALETTE (???)
#
set palette defined


#
# DATA file - ACTUAL PLOTTING (end of script)
#
DATAFILE = "brm_gnu.dat"
splot DATAFILE linestyle 1

set terminal png transparent \
   size WSIZEW, WSIZEH \
   truecolor enhanced
set out 'brm_gnu.png'
splot DATAFILE linestyle 2
```

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Generate `surf`-like plot from `scatter` base Michele Esposito Marzino <espositomichele96@gmail.com> - 2023-01-11 07:37 -0800
  Re: Generate `surf`-like plot from `scatter` base Gavin Buxton <gavinbuxton@gmail.com> - 2023-02-01 06:12 -0800

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