GNUPLOT Each Histogram Bar with different color

bitmap, gnuplot, histogram

Solution

Nice question. I've managed to make it work using the `boxes` style as opposed to the `histogram` style you were originally using. I don't think that should make too much of a difference though:

set boxwidth 1
set grid
set style fill solid 1.0 border -1
set yrange [0:*]
set xrange [-.5:*]
set xtics border in scale 0,10  nomirror rotate by -45  
plot "histo.dat" using ($0):1:($0):xticlabels(2) w boxes lc variable notitle
                        #^boxes centered on 0,1,2,3,....
                           #^data column
                              #^ linecolor column.  first box has linecolor corresponding to ls 0, second box has linecolor corresponding to ls 1, etc ...
                                   #^ xticlabels (apparently) come last.

If you're unfamiliar with pseudo-column 0, it is (essentially) the line number in the datafile. I don't usually post the output of these things, but this makes one very colorful plot!

Problem

I want to visualize the amount of different colors of a bitmap file. My Datasheet looks like: ``` 1 163073164 4 185122087 3 255242000 8 255255255 3 000162232 1 181230029 1 127127127 1 136000021 3 200191231 ``` I want to draw each color bar with its own color by using gnu plot histogram style. I just try something out by using "lc variable" but it doesnt work. :-( My GNUPLOT script by now: ``` set style data histograms set boxwidth 1 set grid set style histogram cluster gap 0 set style fill solid 1.0 border -1 set yrange [0:*] set xrange [0:*] set xtics border in scale 0,10 nomirror rotate by -45 offset character 0, 0, 0 left plot "histo.dat" using 1:xticlabels(2) lc variable no title #EOF ``` I've got this error message: ``` gnuplot> plot "histo.dat" using 1:xticlabels(2) lc variable no title ^ "histo.plt", line 9: Bad data on line 1 ``` Can anybody give me a hint or the correct commands? Best regards Robert

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