Since you're looking for the letter 'a' in field that always contains the
word 'latex' there's bound to be something off.
If I may suggest a simpler approach. Include a list field, say 'vars' that
lists the variables associated with an equation. For acceleration, we would
have
[[Inital Velocity]] [[Final Velocity]] Time
Then this simpler code would do what you want (hopefully):
{{!!equation}}
<table>
<tr><th>Variable</th><th>Description</th><th>Unit</th></tr>
<$list filter="[list[!!vars]sort[title]]" >
<tr><th>
<$transclude field="variablelatex"/>
</th><th><$link><$transclude field="title"/></$link></th><th><$transclude
field="unitlatex"/></th></tr>
</$list>
</table>
It worked on Acceleration. But you don't have the variable tiddlers for
Enthalpy defined so I couldn't test that.
Good luck!
On Tuesday, May 2, 2017 at 4:22:05 AM UTC-7, Stephen Wilson wrote:
>
> Hello Helpful People!
>
> Following on from this thread here
> <https://groups.google.com/d/msg/tiddlywiki/r2tVxlOiXl4/hrNqYEWsEwAJ> and
> Sara kindly putting her work up on tiddlyspot here:
> http://foxridgegarden.tiddlyspot.com/
> I've finally carved out a little time to see if I can steal the core
> filters and apply it to my own equation heavy tiddlyspot here:
> stephenteacher.tiddlyspot.com/
>
> Rather than go in all guns blazing I have started a small test wiki here
> http://stephenteachertests.tiddlyspot.com/
>
> All is mostly well and things working as they should, however...
>
> Acceleration appears to be a problem. When I set the variable to 'a' it
> appears in all equations regardless of whether acceleration is in the
> equation or not. If I change it to a 'b' all is fine and it only appears
> in the proper place.
>
> The code from the template is:
> \define varPattern()
> $(var)$
> \end
>
> {{!!equation}}
>
> <table>
> <tr><th>Variable</th><th>Description</th><th>Unit</th></tr>
> <$set name="eq" value={{!!equation}}>
> <$list filter="[tag[Variable]sort[title]]" variable="varTiddler">
> <$set name="var" filter="[<varTiddler>get[variable]]">
> <$set name="unit" filter="[<varTiddler>get[unit]]">
> <$list filter=
> "[tag[Equation]field:equation<eq>regexp:equation<varPattern>]">
> <$tiddler tiddler=<<varTiddler>>>
> <tr><th>
> <$transclude field="variablelatex"/>
> </th><th><$link><$transclude field="title"/></$link></th><th><$transclude
> field="unitlatex"/></th></tr>
> </$tiddler>
> </$list>
> </$set>
> </$set>
> </$list>
> </$set>
> </table>
>
> All other templates and related can be found at
> http://stephenteachertests.tiddlyspot.com/
>
>
>
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