Re: [Gnuplot-info] Plotting multiple arrows in gnuplot

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

l=1.
plot 'datafile' using 1:2:(l*cos($3)):(l*sin($3)) with vectors

use 'l' to adjust the length of the vectors.


a.g.s.maxwell wrote:
> 
> I have a data file with 3 columns (x,y,theta), and I have plotted a graph
> of the x and y positions. Now I need to draw an arrow from each (x,y) to
> (x+cos(theta),y+sin(theta)) which is easily done by typing in each point
> separately but I will need to do it for up to 1000 points, so can anyone
> help me with some code that will automatically assign an arrow to every
> point on the graph according to the directions above? 
> 
> Thanks
> 

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