[Gnuplot-info] How to combine a linear range and log-scale range in the same X-axis?

[BBands <bb...@gm...>]

One approach might be to 'set log x2' log and plot the data once on x
and once on x2 using the ternary operator eliminate the unwanted
points. See 'help operators ternary' and 'help set logscale' for
details.

    jab

On Tue, Apr 26, 2011 at 12:07 PM, Tomás Navarro
<lla...@ho...> wrote:
>
> Hello all.
>
> I have not found the way to solve the following problem:
>
> I want to plot a set of data in only one plot.
>
> The problem is that some points of the data should be better plotted in a
> linear scale (lets say 0 to 100,000) but there are other data points that,
> exceding the value 100,000, would be better plotted in a logarithmic scale,
> as they goes in the range 100,000 to 500,000,000.
>
> Let's say the data is:
>
>     X       Y
>        0   100
>    10000    80
>    20000    75
>    30000    60
>    40000    55
>    50000    50
>    60000    48
>    70000    45
>    80000    43
>    90000    41
>   100000    40
>   500000    35
>  1000000    30
>  5000000    25
>  10000000    20
>  50000000    15
> 100000000    10
> 500000000     8
>
> (in fact there are much more data points in the 0-100,000 interval)
>
> Is there a way to plot all these points in the same plot in only one X-axis
> showing two different ranges in that axis:
> linear: 0-100,000
> logarithmic: 100,000 - 1,000,000,000 ?
>
> The axis would be read, for example, as:
>
> |-----|-----|-----|-----|-----|-----|-----|-----|-----|
> 0    2E4   4E4   6E4   8E4   1E5   1E6   1E7   1E8   1E9
> Thanks.