[Chart] question about autoScaledLogAxis

[grant weyburne]

Thanks, that's helpful. I'll use your suggestions.

Grant


On Sat, Mar 15, 2014 at 8:45 PM, Tim Docker <tim at dockerz.net> wrote:

> There's not currently an easy way to do a log base 2 axis.
>
> The code for the log 10 axis is indeed a bit complex:
>
>
> https://github.com/timbod7/haskell-chart/blob/master/chart/Graphics/Rendering/Chart/Axis/Floating.hs#L188
>
> this went through several contributed variations to end up in this state.
> It's complex due to the fact that it embeds several heuristics to find
> pleasing looking automatic axis, with the right number of ticks displayed.
>
> If you wanted to have a go at adding log 2 support, I suggest:
>
>    - adding an enum parameter to LogAxisParams with values Base2 and
> Base10, making Base10 the default.
>    - renaming logTicks to log10Ticks
>    - writing log2Ticks to generate the appropriate labels, and graduations
> given an input range
>    - Changing autoScaledLogAxis to observe the new enum and call either
> the existing log10 code or your log2 code.
>
> Cheers,
>
> Tim
>
>
> On 16 Mar 2014, at 9:42 am, grant weyburne <gbwey9 at gmail.com> wrote:
>
> > Hello,
> >
> > Is there an easy way to create an autoScaledLogAxis for log base 2
> instead of log base 10. I looked at the code for logTicks in
> chart\Graphics\Rendering\Chart\Axis\Floating.hs
> > but didn't understand what was going on.
> >
> > By the way this is an excellent package!
> >
> > Thanks for any help.
> > Grant
> > _______________________________________________
> > Chart mailing list
> > Chart at projects.haskell.org
> > http://projects.haskell.org/cgi-bin/mailman/listinfo/chart
>
>
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