[Gnuplot-info] Set Linestyle bases on data value

[Aaron R. <aar...@gm...>]

Hello,

I'm wondering if there is a way to set the line style based on a value from
the plotted data? I'm trying to have all of my data in a single file and
just iterate over it. I want to use a column value to indicate what color
the line should be draw (may have same type of data from multiple sources-
color is used to indicate type. I haven't been able to get anything to work
yet.

Sample data:
#yindex  data_label type_indicator start length
0  LABEL1 1 20 10
0  LABEL1 1 60 20


1 LABEL2 2 10 90


2 LABEL3 1 100 50

gnuplot file:
set style line 1 lt rgb 'black' lw 10
set style line 2 lt rgb "cyan" lw 10


I want to have something like this:

plot DATAFILE using 4:1:5:(0):ytic(2)  with vectors notitle nohead ls ($3)

instead of:
plot DATAFILE using 4:1:5:(0):ytic(2) index 0 with vectors notitle nohead
ls 1, \
      DATAFILE using 4:1:5:(0):ytic(2) index 1 with vectors notitle nohead
ls 2, \
      DATAFILE using 4:1:5:(0):ytic(2) index 2 with vectors notitle nohead
ls 1, \
      ...
      index n



Thanks for any suggestions.

-Aaron