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\pst@def{ScalePointsThreeD}<%
  counttomark dup dup cvi eq not { exch pop } if
  /m exch def /n m 3 div cvi def
  n {             % now we have x y z
    3 -1 roll
    490 sub 2 div % (x-490)/2
    3 1 roll
    exch 2 div % y/2
    exch
    tx@3DPlotDict begin
    saveCoor
    ConvertTo2D
    x2D \pst@number\psxunit mul y2D \pst@number\psyunit mul
    end
    m 1 sub 1 roll m 1 sub 1 roll /m m 3 sub def } repeat> 

\documentclass{standalone}
\usepackage[utf8]{inputenc}

\usepackage{amsmath,amssymb}
\usepackage{pst-3dplot}
\usepackage{pstricks-add}
\makeatletter
\pst@def{ScalePointsThreeD}<%
  counttomark dup dup cvi eq not { exch pop } if
  /m exch def /n m 3 div cvi def
  n { 				% now we have x y z
    3 -1 roll
    490 sub 2 div % (x-490)/2
    3 1 roll
    exch 2 div % y/2
    exch
    tx@3DPlotDict begin
    saveCoor
    ConvertTo2D
    x2D \pst@number\psxunit mul y2D \pst@number\psyunit mul 
    end
    m 1 sub 1 roll m 1 sub 1 roll /m m 3 sub def } repeat>
\makeatother
\pagestyle{empty}

\begin{document}

\begin{pspicture}(-6,-3)(5,11)
\psset{Alpha=30, Beta=20, unit=0.75}
\pstThreeDCoor[%
  xMin=0,xMax=5,%
  yMin=-5,yMax=5,%
  zMin=0,zMax=5]
\readdata{\spatialResolutionFifty}{SpatialAverage_Time_2.txt}
\listplotThreeD[plotstyle=line,linecolor=blue,
     drawStyle=yLines]{\spatialResolutionFifty}
\end{pspicture}

\end{document}

\documentclass[a4paper]{standalone}
\usepackage[utf8]{inputenc}
\usepackage{times}
\usepackage{graphicx}
\usepackage{amsmath,amssymb}
\usepackage{pstricks}
\usepackage{pst-plot}
\usepackage{pstricks-add}
\usepackage{pst-3dplot}
%
\pagestyle{empty}
%
\begin{document}
%
\begin{pspicture}(-6,-3)(5,11)
%
\psset{xunit=.05cm, yunit=.05cm, Alpha=-30, Beta=20}
%
\pstThreeDCoor[%
xMin=480,xMax=520,%
yMin=-100,yMax=100,%
zMin=0,zMax=100]
%
%%%%%%%%%% reading data %%%%%%%%%
%
\readdata{\spatialResolutionFifty}{SpatialAverage_Time_2.txt}
%
%%%%%%%%% plotting data %%%%%%%%%
%
\dataplotThreeD[plotstyle=line,drawStyle=yLines]{\spatialResolutionFifty}
%
\end{pspicture}
%
\end{document}