[Gnuplot-info] Adding "headroom" for autoscaling

[Egil K. <eg...@kv...>]

Suppose you have a data set in a file "test.dat" like this:

   1  10.0
   2  9.0
   3  9.0
   4  11.0
   5  12.0
   6  12.0

Using the default autoscaling to plot, like this

   plot "test.dat" with lines

gives an ugly result. The plotted line between 2 and 3, and also between
5 and 6 on the X-axis gets hidden by the graph border, and especially
for the case between 5 and 6, it is especially misleading since the
observer will be led to believe there is no data between 5 and 6.

Setting the yrange manually to [8.0:13.0] obviously fixes this, but I
really would need to have autoscale to do this for me, but have found no
way of achieving that. Have I overlooked something? The logic I am after
is that if the autorange reaches an exact tic, it should extend the
range to the next one, in either end. It seems like an obvious thing?

Sincerely,

Egil Kvaleberg