[pstricks] sqrt function

[Herbert Voss]

Richard J. Cattien wrote:

> How do i plot the following function.
> 
> 	y = sqrt(x-2)
> 
> I always get an error:
> Error: /rangechek in --sqrt--
> Operand stack:
> 0.0    -2
> 
> I use:
> \psplot[plotpoints=200]{0}{6}{x 2 sub sqrt}
> 
> with add instead of sub everything works fine.

sure, there is no root of a negative value!

\psplot[plotpoints=200]{2}{6}{x 2 sub sqrt}

Herbert


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