I'm not sure if this actually works, but it seems to give the right answer:
\define sqr(x) <$macrocall $name="rpn" a=$x$ b=$x$ operation="*"/> \define pony(hg,len) <$wikify name=hg2 text="<<rpn $hg$ $hg$ *>>"> <$wikify name=hg2len text='<$macrocall $name="rpn" a=<<hg2>> b=$len$ operation="*"/>'> <$wikify name=weight text='<$macrocall $name="rpn" a=<<hg2len>> b="11800" operation="/" decimals=2/>'> <$macrocall $name="rpn" a=<<weight>> b=" kgs" operation="&" /> </$wikify></$wikify></$wikify> \end <<pony 100 200>> Only the wikify widget made this straight-forward. I guessed at the pony measurements. Suspect the girth is too small. I notice that horse calculations tack on 50lbs. Mark On Wednesday, August 16, 2017 at 8:16:57 AM UTC-7, @TiddlyTweeter wrote: > > Ciao Thomas > > Originally I wasn't really interested in RPN because I'm still looking for > something simple that can add up a column in a table without having to have > a Tiddler per row. > > However RPN its growing on me as a way to do simple calculations. *Obvious > applications are, for instance, a measures convertor* (°F -> °C; Euros to > Dollars etc) > > Could it, for instance, calculate the weight of your pony? :-) > > Just for fun here is the formula for estimating the weight of a pony ... > > Pony Weight in Kgs = (heart-girth2 cms x > length-from-shoulder-to-tip-of-buttocks > cms) / 11,880 > > Note: the small "2" on "heart-girth" means "squared". ** > > Best wishes > Josiah > > P.S. ** I'm not making this up. The horse weight calculation thing is > here: > http://www.thehorse.com/articles/27936/estimating-horse-weight-accurately > > Thomas Elmiger wrote: >> I showed my little pony some new tricks. >> > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/bfe3d495-8178-4e05-9368-17d274e0bf9d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
