Re: [Gnuplot-info] bars between coordinates, thickness variable

[Thomas S. <t.s...@fz...>]

herrdeh wrote:
> 
> Now a second issue comes up:
> 
> I'd like to visualize the number of passengers between the different  
> bus tops. Data could be given in 3 columns: <number_of_passengers>,  
> <x-coordinate>, < y-coordinate>.
> 
> The number_of_passengers values should be expressed by the thickness  
> of the lines between the bus stops (expressed by coordinates).
> 
> How can I do that?
> 

you could draw each connection between subsequent bus stops separately,
with gnuplot 4.3-cvs you could use the 'for' loop.

let's assume, that each data line contains the number of passengers
leaving the bus stop at the coordinate given by x and y:

number_of_busstops = 10
plot "datafile" using 2:(my_lw=$1, 0/0) every 1::0::0 notitle, \
   for [i=1:number_of_busstops] "" using 2:(my_lw=$1, $3) \
   every 1::(i-1)::i with lines linetype 1 linewidth my_lw notitle

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