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Groups > comp.graphics.apps.gnuplot > #1913

Please help - plot image not working

Newsgroups comp.graphics.apps.gnuplot
Date 2013-06-25 02:27 -0700
Message-ID <e748d557-b03b-48de-b031-d3b52eedf0ce@googlegroups.com> (permalink)
Subject Please help - plot image not working
From Sree <sreejithpk@gmail.com>

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Hello group,


I have a data matrix in a file. The data is comma separated and looks like (i do not know how to attach a file to the post):

32.71615219116211,32.35625839233398,31.498046875,30.73119926452637,30.77080345153809,31.56380462646484,32.03682327270508,33.60488128662109,33.0875358581543,33.42950439453125,32.52166366577148,33.06188201904297,33.81738662719727,33.58745956420898,33.51096343994141,32.37562942504883,32.29684448242188,31.98270416259766,32.52191543579102,32.67719268798828,32.59981536865234,32.91101837158203,33.16838073730469,32.82643508911133,31.57819938659668,31.00910568237305,31.31731414794922,29.89642333984375,32.47930908203125,32.2718505859375,33.17678833007812,32.15474700927734,33.08844375610352,-inf,-inf,-inf
34.66389846801758,34.15962982177734,33.09500503540039,31.83910942077637,31.35856437683105,32.72917175292969,33.30414199829102,34.22311401367188,33.47836303710938,32.94600677490234,33.19053268432617,34.06565093994141,34.55643081665039,34.12158203125,34.16344833374023,33.06776809692383,33.35759353637695,32.38563919067383,32.79897308349609,32.89970397949219,33.78991317749023,32.83514785766602,32.41145324707031,32.71649169921875,31.50583457946777,31.1647777557373,31.491943359375,30.10324096679688,32.18594360351562,32.05590057373047,31.88617134094238,31.39592742919922,31.54354286193848,31.09903907775879,32.32763290405273,33.10724258422852,34.64406585693359,35.16285705566406,32.22066 .....
.......


I am trying to plot an image with the following command:

gnuplot> set datafile separator ','
gnuplot> plot 'data.txt' matrix using (0+column(1)*1.6384):(-6.0+column(2)*6.256021):(column(3)) with image


but it is producing an empty plot with the warning:

warning: Image grid must be at least 2 x 2.
warning: Image grid must be at least 2 x 2.


the same data, i tried to plot in a different computer (computer 2) and then it works fine with same set of commands. My question is what is going wrong in the first case. is it the gnuplot version or something else. 
The following is the gnuplot versions.

where the plot command doesn't work (computer 1):
gnuplot> show version long

        G N U P L O T
        Version 4.6 patchlevel 3    last modified 2013-04-12
        Build System: Linux x86_64

        Copyright (C) 1986-1993, 1998, 2004, 2007-2013
        Thomas Williams, Colin Kelley and many others

        gnuplot home:     http://www.gnuplot.info
        faq, bugs, etc:   type "help FAQ"
        immediate help:   type "help"  (plot window: hit 'h')
Compile options:
-READLINE  +LIBREADLINE  +HISTORY
-BACKWARDS_COMPATIBILITY  +BINARY_DATA
+GD_PNG  +GD_JPEG  +GD_TTF  +GD_GIF  +ANIMATION
-USE_CWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +X11_EXTERNAL +USE_MOUSE  +HIDDEN3D_QUADTREE
+DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +IMAGE  +USER_LINETYPES +STATS

GNUPLOT_DRIVER_DIR = "/usr/local/libexec/gnuplot/4.6"
GNUPLOT_PS_DIR     = "/usr/local/share/gnuplot/4.6/PostScript"
HELPFILE           = "/usr/local/share/gnuplot/4.6/gnuplot.gih"

Computer 1: Red Hat Enterprise Linux Server release 6.3 (Santiago)




where I can plot the image with the same commands (computer 2)
gnuplot> show version long

    G N U P L O T
    Version 4.7 patchlevel 0    last modified 2013-05-12

    Copyright (C) 1986-1993, 1998, 2004, 2007-2012
    Thomas Williams, Colin Kelley and many others

    gnuplot home:     http://www.gnuplot.info
    mailing list:     gnuplot-beta@lists.sourceforge.net
    faq, bugs, etc:   type "help FAQ"
    immediate help:   type "help"  (plot window: hit 'h')
Compile options:
+READLINE  -LIBREADLINE  +HISTORY 
-BACKWARDS_COMPATIBILITY  +BINARY_DATA 
+GD_PNG  +GD_JPEG  +GD_TTF  +GD_GIF  +ANIMATION 
-USE_CWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +X11_EXTERNAL +USE_MOUSE  +HIDDEN3D_QUADTREE 
+DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +IMAGE  +USER_LINETYPES +STATS

GNUPLOT_DRIVER_DIR = "/usr/local/libexec/gnuplot/4.7"
GNUPLOT_PS_DIR     = "/usr/local/share/gnuplot/4.7/PostScript"
HELPFILE           = "/usr/local/share/gnuplot/4.7/gnuplot.gih"

Computer 2: Ubuntu 12.04.2 LTS

Any help is appreciated.
Thanks
Sree

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Thread

Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-06-25 02:27 -0700
  Re: Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-06-25 19:59 -0700
  Re: Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-06-25 20:53 -0700
    Re: Please help - plot image not working Karl <mail.kfr@gmx.net> - 2013-06-26 07:49 +0200
  Re: Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-06-26 00:15 -0700
    Re: Please help - plot image not working Karl <mail.kfr@gmx.net> - 2013-06-27 07:27 +0200
  Re: Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-07-02 23:39 -0700
    Re: Please help - plot image not working Christoph Bersch <usenet@bersch.net> - 2013-07-03 09:21 +0200
      Re: Please help - plot image not working Sree <sreejithpk@gmail.com> - 2013-07-04 02:25 -0700

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