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

>

>

```

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