Re: [Gnuplot-info] Both positive and negative log y axis in same plot

[<l_b...@us...>]

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   Date: Thu, 24 Jan 2013 07:46:43 -0800
   From: somesh <som...@gm...>
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   Hi,

   I have a data file like this:
   #x  y
   1   34
   2   450
   3   -987
   4   20045
   5   -1003
   6   -30

   For only positive values, just "logscale y" is fine. 
   For only negative values, I can use a reversed logscale:
   --
   set logscale y
   set yrange [ymin:ymax] reverse
   plot file  u 1:(-$2) axis x1y1 t "Y" w linespoints
   --

   But how do I plot both positive and negative values in same plot? 
   I want to place the x axis at the center of y axis; positive log scale (for
   positive values) above the x axis, and reversed logscale (for negative
   values) below the x axis.

How about

f(x) = (x >= 0 ? x : 1/abs(x));

plot file using 1:(f($2)) ....


Leo