[pstricks] Drawing S- and Z-Curves
Michael Sharpe
msharpe at ucsd.edu
Wed Apr 22 00:33:42 CEST 2009
On Apr 21, 2009, at 2:44 PM, Rich Shepard wrote:
> I need to draw S- and Z-curves between specific points on the X-
> axis (as
> well as normal curves). I assume that \psbezier is the appropriate
> package
> to use for this, but I've not before had any experience with it. If
> I want
> the curve to start and end at specific x-values, with y=0.5 (on the
> range
> 0.0-1.0) at a specific x-value, can I do so?
>
> There is an example of Bezier curves in Herbert's Chapter 5 of
> TLGC2 (in
> the section on curves). Is there a more complete description of this
> package?
>
> What I would like to do is re-draw the Xfig graphics I used in my
> book
> using PSTricks. One example (term-set.eps) is attached. A pointer on
> what to
> read to learn how to do figures of this sort with PSTricks will be
> much
> appreciated.
Both S-curves and Z-curves, as I know them, are defined by functions
known to Postscript, so there is no need for Bezier approximations. Of
course, both those terms have multiple meanings, but I assume that Z-
curve means a normal density curve (two parameters) and S-curve means
a logistic curve (3 parameters.)
Michael
More information about the PSTricks
mailing list