[pstricks] psgrid and gridpara

[Poul Riis]

1) Who can explain the behavior of the following example (two graphs, with
and without psgrid)?

\documentclass{article}
\usepackage{pst-plot,pstricks-add}
\usepackage[left=1cm,top=1cm,right=1cm,bottom=1cm]{geometry}
 
\newrgbcolor{Lcolor181.0161}{0 0 0}
\newrgbcolor{Fcolor181.0161}{0.4 0 0}
 
\begin{document}
Without psgrid:\\[1cm]
   \psset{
     llx=-1cm,
     lly=-1cm,
     xAxisLabel={x axis},
     xAxisLabelPos={c,-0.55cm},
     yAxisLabel={y axis},
     yAxisLabelPos={-1cm,c}
}
   \begin{psgraph}[
     axesstyle=frame,
     %psgrid,
     Dy=.5,
     xticksize=0 4,
     yticksize=0 7,
     ticklinestyle=dotted,
   ](0,0)(7,4){10cm}{7cm}
     \savedata{\mydata}[{
       {0.000000,0.000000},
       {0.314159,0.098696},
       {0.628319,0.394784},
       {0.942478,0.888264},
       {1.256637,1.579137},
       {1.570796,2.467401},
       {1.884956,3.553058},
       {1.994391,4.000000}
     }]
     \pscustom[
       linestyle=none,
       fillstyle=solid,
       opacity=0.25,
       fillcolor=Fcolor181.0161,
     ]{
       \dataplot[
         plotstyle=curve,
         linestyle=solid,
         linecolor=Lcolor181.0161
       ]{\mydata}
       \psline(1.994391,4)(6.3,4)(6.3,0)
     }
   \end{psgraph}
\\[1cm]
With psgrid:\\[4cm]

\begin{psgraph}[
	axesstyle=frame,
	psgrid,
	Dy=.5,
	xticksize=0 4,
	yticksize=0 7,
	ticklinestyle=dotted,
	](0,0)(7,4){10cm}{7cm}	
	\savedata{\mydata}[{
		{0.000000,0.000000},
		{0.314159,0.098696},
		{0.628319,0.394784},
		{0.942478,0.888264},
		{1.256637,1.579137},
		{1.570796,2.467401},
		{1.884956,3.553058},
		{1.994391,4.000000}
	}]
	\pscustom[
	linestyle=none,
	fillstyle=solid,
	opacity=0.25,
	fillcolor=Fcolor181.0161,
	]{
		\dataplot[
		plotstyle=curve,
		linestyle=solid,
		linecolor=Lcolor181.0161
		]{\mydata}
		\psline(1.994391,4)(6.3,4)(6.3,0)
	}
\end{psgraph}

\end{document}



2) I cannot find the exact syntax for the parameter gridpara. Can someone
give a minimal example?


Poul Riis


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