[pstricks] exclamation mark

Christoph Bersch usenet at bersch.net
Wed Aug 15 14:31:44 CEST 2007

Doris Wagner schrieb:
> sometimes in pstricks-code there are expressions like this:
> linecolor=gray!20
> I guess that the exclamation mark is something postscript-specific. Can 
> anyone explain the meaning of this exclamation mark or tell me where I 
> can find something about it in the web?

Not every exclamation mark has something to do with postscript :-)

In your case it is the syntax of the color definitions in the paket 

In contrast if you have something like this

\pnode(! 2 5 div 9 sqrt){Node}

the ! indicates that raw postscript code follows that (in this simple 
case) must evaluate to a coordinate pair (here 0.4 3)

Hope that helps a bit


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