[pstricks] [Help]How to draw a piecewise function with pst-plot

Michael Sharpe msharpe at ucsd.edu
Sun Jul 11 07:27:30 CEST 2010

On Jul 10, 2010, at 9:36 PM, jungleman wrote:

> Hi all,
> I'm trying to use pstricks to plot some functions with pstricks in LaTex. And now some problems have occurred to me.
> Here's a piecewise function or subfunction f(x):
>         f(x) = 1   while x <= 0 
>         f(x) = 0   while x >  0
> and I tried to use pst-plot : \psline[linecolor=red](-3,1)(0,1)
>                                      \psline[linecolor=red](0,0)(4,0)
> but I donnot know how to make the coordinate (0,0) to be a hollow dot, while (0,1) is a solid dot.
> And another problem is that I also tried the IfTE : \psplot{-3}{4}{ ifTE(x>0,0,1) }, but pstricks tried to connect the line y=0 and the line y=1 to be a continuous line.
> Can anyone tell me how to fix the problem, thanks very much.

Try instead



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