I’m now gonna plot a 10-category histogram with GNUPLOT. Since number of categories is relative large, I want to specify patterns for different categories myself instead of applying the default pattern setting making different categories easy distinguished, e.g. fill the first category with dash-line while the second shaded, etc.
Is there any parameter can be employed to specify a pattern in the plot command? Any hints/advice will be highly appreciated. Thanks in advance.
Best Regards!
It is an interesting problem. After read your question I wrote a blog to talk about it. May be you can have a look. The link is here:

http://gnuplot-surprising.blogspot.com/2011/09/plot-histograms-using-boxes.html