Re: On order of options to Graphics[]

*To*: mathgroup at smc.vnet.net*Subject*: [mg70575] Re: On order of options to Graphics[]*From*: dh <dh at metrohm.ch>*Date*: Fri, 20 Oct 2006 05:21:38 -0400 (EDT)*References*: <egfrt7$qkl$1@smc.vnet.net>

Hi Nasser, Thickness changes all the drawings that are specified afterwards. By this you may have different linewidth in your graphics. E.g.: Show[Graphics[{Thickness[0.1], Line[{{0, 0}, {1, 0}}], Thickness[0.05], Line[{{1, 0}, {1, 1}}], Thickness[0.01], Line[{{1, 1}, {0, 1}}]}]] Daniel Nasser Abbasi wrote: > 5.2 on XP: > > It seems strange to me that the order of arguments in this example should > have made a difference, but it does: > > When I write Thickness[] After Line[] it has no effect. But before, it does: > > Show[ Graphics[ { Line[{{1, 0}, {1, 6}}], Thickness[0.1] } ] ] > (*does not work eq(1)*) > > Show[ Graphics[ { Thickness[0.1], Line[{{1, 0}, {1, 6}}] } ] ] > (*now it works eq(2)*) > > From help it says: > > Graphics[ primitives, options] > > Then It gives Line[] as an example of a graphic primitive, and Thickness[] > as an example of graphics Directive. But help did NOT say which order the > primitive and directive should have with respect to each others. It just > says "the following directives can be used" and leaves it up to the user to > figure that the order of primitive and directive is important. > > So based on this little experiment, One must write > > Graphics[ { Directive, Primitive } ] ----> maps to eq (2) which > works > > and not > > Graphics[ { Primitive, Directive } ] ----> maps to eq(1) > > It seems more logical to me to write {Primitive,Directive}. But this does > not work. One must have the Directive before the Primitive. > > I wish the help can be more detailed. I find Mathematica help hard to follow > many times. Mathematica help needs to be more detailed. > > Nasser > >