I made test with a Mandelbrot set zoom with the logarithmic interval and it
works really well :-)
The zoom scale get down to ridiculously small numbers and it is only
possible to do using logarithmic steps.

Cheers,
Karl




On Sat, Feb 9, 2019 at 5:04 PM karl ramberg <karlramberg at gmail.com> wrote:

> Hi,
> Cool. I will try it soon. I have a cold at the moment :-(
>
> Cheers,
> Karl
>
>
> On Fri, Feb 8, 2019 at 10:28 PM Nicolas Cellier <
> nicolas.cellier.aka.nice at gmail.com> wrote:
>
>> And I have added a LogarithmicInterval which is more like numpy.logspace.
>>
>> For a LogarithmicInterval, bounds are specified by their logarithm (in
>> whatever base).
>>
>> If you want 100 points from 0.1 to: 10.0, then you can write:
>>     (0.1 log logTo: 10 log size: 100 base: 10).
>> or:
>>     (-1 logTo: 1 size: 100 base: 10)
>> or you can omit the base and use ln/exp
>>     (0.1 ln logTo: 10 ln size: 100).
>>
>> Le ven. 8 févr. 2019 à 15:56, Nicolas Cellier <
>> nicolas.cellier.aka.nice at gmail.com> a écrit :
>>
>>> Hi Karl, I published GeometricInterval along with some
>>> GeometricIntervalTests at
>>>
>>>     MCHttpRepository
>>>         location: 'http://www.squeaksource.com/STEM'
>>>         user: ''
>>>         password: ''.
>>>
>>> It is a port of VW SYSEXT-GeometricInterval from Cincom public store, a
>>> bit revisited.
>>>
>>> Le dim. 3 févr. 2019 à 21:18, karl ramberg <karlramberg at gmail.com> a
>>> écrit :
>>>
>>>> You are right.
>>>> It would be nice to have a logarithmic interval.
>>>>
>>>> Best.
>>>> Karl
>>>>
>>>>
>>>> On Sun, Feb 3, 2019 at 6:37 PM Nicolas Cellier <
>>>> nicolas.cellier.aka.nice at gmail.com> wrote:
>>>>
>>>>> Hi karl,
>>>>> This is not a logarithmic interval. The progression should be
>>>>> geometric, that is with a constant ratio.
>>>>>
>>>>>     x3/x2 = (x2/x1).
>>>>>
>>>>> The ith element of geometric serie should be something like
>>>>>
>>>>>     (ratio raisedTo: i-1) * start.
>>>>>
>>>>> Le dim. 3 févr. 2019 à 18:15, karl ramberg <karlramberg at gmail.com> a
>>>>> écrit :
>>>>>
>>>>>> I used a workaround that probably is more flexible since I have
>>>>>> several variables that need the logarithm
>>>>>>
>>>>>> steps := 100.
>>>>>> xLog := 0.02 log: steps.
>>>>>> yLog := 1.894 log: steps
>>>>>> 1 to: steps do:[:i|
>>>>>>           x := i raisedTo: xLog.
>>>>>>           y := i raisedTo: yLog.
>>>>>>           ]
>>>>>>
>>>>>> Best,
>>>>>> Karl
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sun, Feb 3, 2019 at 5:10 PM Nicolas Cellier <
>>>>>> nicolas.cellier.aka.nice at gmail.com> wrote:
>>>>>>
>>>>>>> Yes,
>>>>>>> But i don't remember if published somewhere... I'll check this
>>>>>>> evening or tomorrow
>>>>>>>
>>>>>>> Le dim. 3 févr. 2019 à 16:43, karl ramberg <karlramberg at gmail.com>
>>>>>>> a écrit :
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> Does anybody know of a logarithmic interval implementation in
>>>>>>>> Squeak where the steps in the interval go by logarithmic scale instead of
>>>>>>>> linear ?
>>>>>>>>
>>>>>>>> Best,
>>>>>>>> Karl
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>
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