[pstricks] How to show a specific point of a function's curve?

[Denis Bitouzé]

Le lundi 24/01/11 à 10h19,
Jean-Côme Charpentier <jean-come.charpentier at wanadoo.fr> a écrit :

> Le 23/01/2011 19:11, Denis Bitouzé a écrit :
> > Hello,
> 
>    Hello young padawan!

Not so (young)...

> > What would be the best way to show the point of the curve (with a
> > qdisk on the point and two parallel lines for its x- and y-values)
> > just by specifying its x-value?
> 
>    I'm not sure that my solution is the best way. It uses pst-node
> (and infix-RPN if you want to specify function with algebraic
> notation).

Of course I want to specify it this way: my feature request is for
LaTeX beginners! :)

> [...] 

Not that bad! A fourth parameter to let the user mark the y-value would
be nice.

And, IMHO, it should be a documented feature of pst-plot, not a tricky
whatsit uneasy to find on the net :)

> > Thanks in anticipation.
> 
>    You're welcome my roudoudou :-)

Jean-Côme, I let you explain to the non-French speakers of this list, in
English, what "roudoudou" means: if you succeed without being actually
ridiculous, I'll offer you a Guinness (yuk!) next time we'll meet.
-- 
Denis