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Top Forums UNIX for Advanced & Expert Users Gnuplot question: plotting 3D data in map view Post 302137187 by karman on Sunday 23rd of September 2007 10:37:57 AM
Old 09-23-2007
Gnuplot question: plotting 3D data in map view

I have a simple gnuplot question. I have a set of points (list of x,y,z values; irregularly spaced, i.e. no grid) that I want to plot. I want the plot to look like this:
- map view (no 3D view)
- color of each point should depend on z-value.
- I want to define my own color scale
- plot should contain a little legend box in the form of a color bar listing what z-value corresponds to what color

I tried pm3d, but it seems it only handles gridded data, i.e. x,y's on a regular grid, or at least displays them as such. I just want to see the individual points (no interpolation).

Thanks for your help here.
 

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plot(3x)																  plot(3x)

Name
       openpl, erase, label, line, circle, arc, move, cont, point, linemod, space, closepl, box, color, dot - graphics interface

Syntax
       openpl()

       erase()

       label(s)
       char s[];

       line(x1, y1, x2, y2)

       circle(x, y, r)

       arc(x, y, x0, y0, x1, y1)

       move(x, y)

       cont(x, y)

       point(x, y)

       linemod(s)
       char s[];

       space(x0, y0, x1, y1)

       closepl()

       box(x0, x1, y0, y1)

       color(c)

       dot()

Description
       These  subroutines generate graphic output in a device-independent manner.  See for a description of their effect.  The subroutine precedes
       the other subroutines as it opens the device for writing.  The subroutine flushes the output. The and routines are used by  the	lvp16  and
       hp7475a plotters only.

       String arguments to and are null-terminated and do not contain newlines.

       Many of these functions have additional options for different output devices.  They are accessed by the options as follows:

       -lplot	     device-independent graphics stream on standard output for filters

       -lplotaed     AED 512 color graphics terminal

       -lplotbg      BBN bitgraph graphics terminal

       -lplotdumb    dumb terminals without cursor addressing or line printers

       -lplotgigi    gigi graphics terminal

       -lplotgrn     grn files

       -lplot2648    HP 2648 graphics terminal

       -lplot7221    HP 7221 graphics terminal

       -lplotimagen  Imagen laser printer (default 240 DPI resolution)

       -l300	     GSI 300 terminal

       -l300s	     GSI 300S terminal

       -l450	     DASI 450 terminal

       -l4013	     Tektronix 4013 terminal

       -l4014	     Tektronix 4014 terminal

       -llvp16	     DEC LVP16 and HP7475A plotters

See Also
       graph(1g), plot(1g), plot(5)

																	  plot(3x)
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