添加到 y 误差线和误差椭圆。请帮帮我

Question

'''
\savedata{\myData}[       
0.49328505454e+003  4.49778525251e+003    
0.49584934756e+003  4.49579821639e+003    
0.49334314462e+003  4.49720809875e+003    
0.49389975903e+003  4.49785443271e+003
]
\psset{llx=-1cm,urx=5cm,lly=-1cm,ury=5cm}
\pstScalePoints(1,1){492 sub}{4494 sub}
\begin{psgraph}[
   axesstyle=frame,
   mathLabel=false,labelFontSize=\small,
   Dy=0.5, Dx=0.5,
   Oy=4494, Ox=492,
   xticksize=0 5, yticksize=0 5](0,0)(5.001,5.001){10cm}{10cm}
   \listplot[plotstyle=dots,showpoints,
             dotstyle=triangle*,linecolor=red,linewidth=1.5pt]{\myData}               
    \listplot[linecolor=blue,linewidth=0.8pt,
    showpoints=false]{\myData}                     
\end{psgraph}
'''

我想根据我的数据添加 y 误差线和误差椭圆。