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
>
>