Re: Zooming issues in interactive terminals

[Lutz M. <lut...@gm...>]

Hi Ethan,

> I've made this change in scanner.c get_num().
> It fixes the overflows on a system that handles stderr properly (linux)
> and does no worse that the previous code on a system that doesn't (sunos
> 4.1).

I just tried the current CVS build, and the problems with interactive 
zooming remain, except that I don't get an error message anymore ;)

As you mentioned before, the problem is that large numbers, such as those 
generated by apply_zoom() when using logarithmic axes, are not recognized 
as floating point values when they do not contain a decimal point:

gnuplot> set yr[313136844993:1.8789321221e+13]
gnuplot> show yr

        set yrange [ -3.95768e+08 : 1.87893e+13 ] noreverse nowriteback

This obviously doesn't work when the y-axis is logarithmic. 
Changing "%.12g" to "%.12E" in apply_zoom() fixed this issue for me.

Thanks for looking into this,

  Lutz