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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">With listplot I can easily make several kinds of plots of points from a data file (x1,y1),(x2,y2),(x3,y3),....</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">However, I would like to plot (x1,0),(x1,y1),(x2,y1),(x2,0),(x2,y2),(x3,y2),....</font></div>

<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">How can I do that?</font></div>

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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">In more general, how can I store the points from the data file in an array so that I can later refer to the (postscript) coordinates of point nr. i?</font></div>

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<div align="left" style="text-align:left;"><font face="Arial" size="+0" color="#000000" style="font-family:Arial;font-size:10pt;color:#000000;">Poul Riis</font></div>

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