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Special Forums UNIX and Linux Applications Gnuplot question: how to plot 3D points as colored points in map view? Post 302137294 by karman on Monday 24th of September 2007 07:03:18 AM
Old 09-24-2007
Gnuplot question: how to plot 3D points as colored points 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:
- points in map view (no 3D view)
- color of each point should depend on its 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(1) 						      General Commands Manual							   PLOT(1)

NAME
plot - graphics filter SYNOPSIS
plot [ file ... ] DESCRIPTION
Plot interprets plotting instructions (see plot(6)) from the files or standard input, drawing the results in a newly created 81/2(1) win- dow. Plot persists until a newline is typed in the window. Various options may be interspersed with the file arguments; they take effect at the given point in processing. Options are: -d Double buffer: accumulate the plot off-screen and write to the screen all at once when an erase command is encountered or at end of file. -e Erase the screen. -c col Set the foreground color (see plot(6) for color names). -f fill Set the background color. -g grade Set the quality factor for arcs. Higher grades give better quality. -p col Set the pen color. -w Pause until a newline is typed on standard input. -C Close the current plot. -W x0,y0,x1,y1 Specify the bounding rectangle of plot's window. By default it uses a 512x512 window in the middle of the screen. SOURCE
/sys/src/cmd/plot SEE ALSO
81/2(1), plot(6) PLOT(1)
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