Sebastian,
Good to see you progressing here. Latest can be stored anywhere you want
but I like the idea of it being stored in the same dataset.
When using data tiddlers you tend to use indexes and getindex etc... but in
many cases ## replaces the !! that provides a text reference to a field.
So in many cases an index is almost a fieldname in a data tiddler, and in
many cases you can use filters as if they were fields.
I Just build a small set of examples here, as much to clarify for my self.
Try it on tiddlywiki.com
;Tiddlywiki.com has the tiddler $:/config/OriginalTiddlerPaths which is a
large data set for experiments
Last {{{ [[$:/config/OriginalTiddlerPaths]indexes[]sort[]last[]] }}}
<hr>
First {{{ [[$:/config/OriginalTiddlerPaths]indexes[]sort[]first[]] }}}
<hr>
6th {{{ [[$:/config/OriginalTiddlerPaths]indexes[]sort[]nth[6]] }}}
<hr>
<$list filter="[range[10,20]]" variable=row>
<<row>>: {{{ [[$:/config/OriginalTiddlerPaths]indexes[]sort[]nth<row>] }}}<
br>
</$list>
<hr>
;All
{{{ [[$:/config/OriginalTiddlerPaths]indexes[]sort[]] }}}
Regards
TW Tones
On Sunday, June 28, 2020 at 8:32:45 PM UTC+10, Sebastian Ovide wrote:
>
> getting there.
>
> <$edit-text tiddler="weight" index="tmp" tag="input" type="number"/>
> <$button>
> <$action-listops $tiddler="weight" $index="latest"
> $filter={{weight##tmp}}/>
> <$action-listops $tiddler="weight" $index=<<now YYYY0MM0DD0hh0mm0ss>>
> $filter={{weight##tmp}}/>record
> </$button>
>
> weight -> {{weight}}
> weight##latest -> {{weight##latest}}
>
>
> probably the key "latest" is not required. But needs a simple way to
> access the latest value. I guess that it could be done with an filter but
> probably harder compared to {{weight##latest}}
>
> On Sunday, 28 June 2020 10:44:17 UTC+1, Sebastian Ovide wrote:
>>
>> good ideas in the thread.
>>
>> Just trying to implement in the most TW friendly way.
>>
>> TW Tones suggestion of using data tiddlers seems good. That means 1
>> tiddler for each "variable" that I want to keep history of, key would be
>> just a timestamp and perhaps the latest value could have its own key
>> "latest". So for example the tiddler *weight* would have something like
>> this
>>
>> latest:80
>> 20200622:80
>> 20200612:83
>> 20200601:86
>>
>> as TW supports datatiddler out of the box it would allows me to do
>> {{weight##latest}} to get the latest value and with some macro (perhaps JS)
>> I could just parse {{weight}}
>>
>> just trying to get my head around (still cannot think 100% in TW) about
>> using a filter, macro or widget for this ?
>>
>> I guess that. a filter could retrieve the latest value or a series of
>> values (??), and perhaps a macro (or widget?) can save a value...
>>
>>
>>
>>
>>
>> On Sunday, 28 June 2020 08:42:00 UTC+1, Jed Carty wrote:
>>>
>>> I made a plugin for simple time series plots, you can see it demoed
>>> here: https://ooktech.com/TiddlyWiki/ScatterPlot/
>>>
>>> Somewhere I have a setup for gathering data like you describe, I will
>>> look for it.
>>>
>>
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