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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-CA style='font-size:
10.0pt;font-family:Arial'>I created the « \psxpoint »
command to put labels at arbitrary positions on the x-axis. It works ok but I
have to add the factor 1.84ex in order to align the label. So if I change font
or something else, it doesn’t align well anymore. What parameter should I
put there instead?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-CA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\documentclass{article}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\usepackage{mathptmx,pstricks-add}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\makeatletter<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \newlength{\labelpos}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \setlength{\labelpos}{\pst@xticksizeB}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \addtolength{\labelpos}{\pslabelsep}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \addtolength{\labelpos}{1.84ex}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \newcommand{\psxpoint}[2]{<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \psline[linewidth=.5pt]{-}(#1,\pst@xticksizeB)(#1,\pst@xticksizeA)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \rput[b]{0}(#1,-\labelpos){#2}}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\makeatother<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\begin{document}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\begin{psgraph}[arrows=->](0,0)(-1,-2)(4,2){.5\textwidth}{!}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \psplot[algebraic]{0}{4}{sin(x)}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'> \psxpoint{1.5}{$2x_0$}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\end{psgraph}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=FR-CA style='font-size:
10.0pt;font-family:Arial'>\end{document}<o:p></o:p></span></font></p>
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