[Gnuplot-info] Clustered Histogram with embedded data

[wdezell <Bi...@CL...>]

I'm using Gnuplot as a visualization tool for a Qt app.  To streamline the
process my Qt app generates a text file containing all Gnuplot setup, embeds
the plot data in the file, and executes an external Gnuplot process with the
script file passed as a parameter.  A simple working example is as follows:

--- begin script file contents ---
    reset
    set grid
    set auto x
    set yrange [0:]
    set boxwidth 0.9 relative
    set style fill solid 1.00 border -1
    set style histogram gap 1 title offset character 0, 0, 0
    set style data histogram 
    set title "BLUE Recognition By Range
    set ylabel "Count"  
    unset key
    plot '-' index 0 using 2:xtic(1) ti col  ls 11 

    xx  0
    "0 <500m"  1
    "500 <1Km"  1
    "1K <2Km"  21
    "2K <3Km"  42
    "3K <4Km"  22
    "4K <5Km"  15
    ">5Km"  9
    e


    pause mouse keypress
--- end script file contents ---

Now for the guidance I desperately need -- I need to do the same thing for a
"Clustered Histogram".  The second example on the demo page at 
http://gnuplot.sourceforge.net/demo_4.2/histograms.html
http://gnuplot.sourceforge.net/demo_4.2/histograms.html  is basically what I
need to accomplish.  However, I cannot figure out a correct "plot" syntax
that will correctly support the right "using" syntax that will grab data
from multi-column embedded data within the same "index".

As a start, I am trying to adapt the provided example to work in a
single-file style.  I would think that the following "plot" syntax might
work but it does not:

 plot '-' index 0 using 6:xtic(1) ti col, '-' index 0 u 12 ti col, \
    '-' index 0 u 13 ti col, '-' index 0 u 14 ti col

I have included commands and data from the online example below packaged
together as example of what I am trying to achieve.  How must I modify the
"plot" line to make this work as a single script?

Any and all guidance is deeply appreciated.

Regards,
Bill

------ begin sample script from example ---------------
# set terminal png transparent nocrop enhanced font arial 8 size 500,350 
# set output 'histograms.2.png'
set bar 1.000000
set boxwidth 0.9 absolute
set style fill  solid 1.00 border -1
set style rectangle back fc lt -3 fillstyle  solid 1.00 border -1
set key inside right top vertical Right noreverse enhanced autotitles
columnhead nobox
set style histogram clustered gap 1 title  offset character 0, 0, 0
set datafile missing '-'
set style data histograms
set xtics border in scale 1,0.5 nomirror rotate by -45  offset character 0,
0, 0
#set xtics  norangelimit
set xtics   ("1891-1900" 0.00000 -1, "1901-1910" 1.00000 -1, "1911-1920"
2.00000 -1, "1921-1930" 3.00000 -1, "1931-1940" 4.00000 -1, "1941-1950"
5.00000 -1, "1951-1960" 6.00000 -1, "1961-1970" 7.00000 -1)
set title "US immigration from Northern Europe\nPlot selected data columns
as histogram of clustered boxes" 
set rrange [ * : * ] noreverse nowriteback  # (currently [0.00000:10.0000] )
set trange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000]
)
set urange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000]
)
set vrange [ * : * ] noreverse nowriteback  # (currently [-5.00000:5.00000]
)
set ylabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set y2label  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set yrange [ 0.00000 : 300000. ] noreverse nowriteback
set cblabel  offset character 0, 0, 0 font "" textcolor lt -1 rotate by 90
set locale "C"
plot 'immigration.dat' using 6:xtic(1) ti col, '' u 12 ti col, '' u 13 ti
col, '' u 14 ti col

# IMMIGRATION BY REGION AND SELECTED COUNTRY OF LAST RESIDENCE
#
Region  Austria Hungary Belgium Czechoslovakia  Denmark France  Germany
Greece  Ireland Italy   Netherlands     Norway  Sweden  Poland  Portugal       
Romania Soviet_Union    Spain   Switzerland     United_Kingdom  Yugoslavia     
Other_Europe    TOTAL   
1891-1900       234081  181288  18167   -       50231   30770   505152 
15979   388416  651893  26758   95015   226266  96720   27508   12750  
505290  8731    31179   271538  -       282     3378014 
1901-1910       668209  808511  41635   -       65285   73379   341498 
167519  339065  2045877 48262   190505  249534  -       69149   53008  
1597306 27935   34922   525950  -       39945   7387494 
1911-1920       453649  442693  33746   3426    41983   61897   143945 
184201  146181  1109524 43718   66395   95074   4813    89732   13311  
921201  68611   23091   341408  1888    31400   4321887 
1921-1930       32868   30680   15846   102194  32430   49610   412202 
51084   211234  455315  26948   68531   97249   227734  29994   67646  
61742   28958   29676   339570  49064   42619   2463194 
1931-1940       3563    7861    4817    14393   2559    12623   144058  9119   
10973   68028   7150    4740    3960    17026   3329    3871    1370    3258   
5512    31572   5835    11949   377566  
1941-1950       24860   3469    12189   8347    5393    38809   226578  8973   
19789   57661   14860   10100   10665   7571    7423    1076    571     2898   
10547   139306  1576    8486    621147  
1951-1960       67106   36637   18575   918     10984   51121   477765 
47608   43362   185491  52277   22935   21697   9985    19588   1039    671    
7894    17675   202824  8225    16350   1325727 
1961-1970       20621   5401    9192    3273    9201    45237   190796 
85969   32966   214111  30606   15484   17116   53539   76065   3531    2465   
44659   18453   213822  20381   11604   1124492 
e


pause mouse keypress
------ end sample script from example -----------------


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