Re: gnuplot trouble joining the dots.

[Ethan A M. <sf...@us...>]

On Wednesday, 27 January, 2016 16:43:33 pl...@pi... wrote:
> Hi,
> 
> I hope I'm not being slow here, but I seem to be having so many problems 
> with gnuplot since I moved to Fedora.
> 
> I have some data which plots tine .... until I ask gnuplot to join the 
> dots.
> 
> 
> gnuplot>  plot [ f1-.1 : f2+.1]   spd_sqrt_v1  u (1/$4):5 w l tit 
> "spd_sqrt v1","" u (1/$4):(atan2($2,$3))
> 
> works as expected , one line plot , one with cross marks, now try both 
> as line plots:
> 
> gnuplot>  plot [ f1-.1 : f2+.1]   spd_sqrt_v1  u (1/$4):5 w l tit 
> "spd_sqrt v1","" u (1/$4):(atan2($2,$3)) w l
> 
> Now I only get the first plot line , the second one is nowhere to be seen.
> 
> 
> Does that make sense to anyone?

At a guess, many of your data points are evaluating to NaN.
Try repeating that last command after doing "set table",
so that you can see the processed coordinates for each point.

	Ethan

> 
> 	G N U P L O T
> 	Version 5.0 patchlevel 1    last modified 2015-06-07
> 
> running Fedora 23 gnuplot-wx , the wxt build.
> 
> 
> Thanks, Peter.