[Gnuplot-info] How to change histogram colors

[Daniel T. <dan...@si...>]

Hi!

I am new to Gnuplot and I try create a "stacked" histogram from some 
output of my application.

Currently I use the following code:
> set boxwidth 1.00
> set style fill solid 1.00 border -1
> set key autotitle columnheader
> set key invert reverse Left outside
> set yrange [0:*]
> set xrange [0:*]
> set auto x
> unset xtics
> set style data histogram
> set style histogram rowstacked
> set ylabel "Counts"
> set xlabel "File Index"

I then plot the histogram via the following command:
> gnuplot.exe "histogram.pl" -e "set title 'Some Title'" -e "set yrange 
> [0:*]" -e "set terminal png size 1024,768" -e "set output 
> 'output.png'" -e "plot 'input.dat' using 2:xtic(1), for [i=%6:%7] '' 
> using i"

The file "input.dat" is generated by my application. It looks like this:
> No    Correct    Incorrect    Lost    Embedded
> 0    7    0    11    18
> 1    9    0    1    10
> 2    46    2    0    48
> 3    11    9    30    50
> [...]

The output from Gnuplot already looks like what I had intended:
http://img684.imageshack.us/img684/1310/messager44100b64jsetup1.png


Now my question:

How can I change the colors? I can change the order of the columns in my 
.dat file, yes.

But ideally I would like to assign each column (and thus each part of a 
histogram bar) a specific color.

Is that possible with Gnuplot?

Also, I would also like to create a "grey-scale" version of the stacked 
histogram, using different patterns rather than different colors.

If possible, how would I do that?


Thanks a lot in advance!

Regards,
Daniel.