Graphics, Figures & Tables ⇒ Inverse variation with PSTricks

[coachbennett1981]

If I were to plot, say y=5/x using postflix, how would I do that? I tried 5 x div, but I get a really funky graph. I am not smart enough to update my pstricks, so using algebraic in my plot does not work..

Any advice would help..

thank you

Nick

[localghost]

Don't you have an idea of how such graph would look like? If not, take for good measure a program like Gnuplot and plot this function. I see no problem with the sample below.

Code: Select all

\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}
  \begin{psgraph}(0,0)(5,5){5cm}{!}   % x-y-axis with same unit
    \psplot{1}{5}{5 x div}
  \end{psgraph}
\end{document}

If this solves your problem, please mark the topic as solved by editing your initial post and choosing the green checkmark from the icon list.


Best regards
Thorsten

[coachbennett1981]

Thorsten,

Thank you again, I did that code, but must not have paid attention to the domain. Did not mean to waste your time, but thank you again!

[CrazyHorse]

Code: Select all

\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}
  \begin{psgraph}(0,0)(5,5){5cm}{!}   % x-y-axis with same unit
    \psplot{1}{5}{5 x div}
  \end{psgraph}
\end{document}

better:

Code: Select all

\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}
  \begin{psgraph}{->}(0,0)(5,5){5cm}{!}
    \psplot[yMaxValue=5,algebraic]{0.01}{5}{ 5/x }
  \end{psgraph}
\end{document}

Herbert

[localghost]

better:

Code: Select all

\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}
  \begin{psgraph}{->}(0,0)(5,5){5cm}{!}
    \psplot[yMaxValue=5,algebraic]{0.01}{5}{ 5/x }
  \end{psgraph}
\end{document}

Herbert

Yes, and of course I'm aware. But as the OP already mentioned, his package version at least doesn't support the algebraic option and an update is not possible at the moment. That's the reason why he has to use the postfix notation (see also related topics). And it is not sure that the yMaxValue option is alredy supported in that version.

[coachbennett1981]

Thank you both for the help, I will hopefully figure out how to update my pstricks. I think I was lucky to even get it on my computer and working. I want to plot 5/x in both the I and III Quadrants on the coordinate plane, but when I do so, I get the asymptote line, is there anyway I can get rid of it?
Also, I could not show anything but the first quadrant using the psgraph feature, so I had to adjust the code.

Thanks Nick

Code: Select all

\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}

 \psaxes{<->}(0,0)(5,5)(-5,-5)
    \psplot{-3}{8}{5 x div}
  
  
\end{document}

[CrazyHorse]

I will hopefully figure out how to update my pstricks. I think I was lucky to even get it on my computer and working. I want to plot 5/x in both the I and III Quadrants on the coordinate plane, but when I do so, I get the asymptote line, is there anyway I can get rid of it?
Also, I could not show anything but the first quadrant using the psgraph feature, so I had to adjust the code.

plot two curves, one for the 1st and one for the 3rd quadrant
or update PSTricks, then you can do it with one:

Code: Select all

\listfiles
\documentclass{minimal}
\usepackage{pstricks-add}

\begin{document}

\begin{pspicture}(-5,-5)(5,5)
\psaxes{<->}(0,0)(5,5)(-5,-5)
    \psplot[yMaxValue=5]{-5}{5}{5 x div}
\end{pspicture}
 
\end{document}

which system do you have and what does the file list and the end of
your log file say?

Herbert

[coachbennett1981]

Herbert, I use TexShop and am currently updated to the newest version. I looked at the log list of One page, but I am not sure what I am looking for. I go to the log list, and I have several options:
~/library/logs
/library/logs
/private/var/log
Section 8.2 Recip

I can see the PDF statistics. I am sorry to be so much trouble, but I don't understand what I am looking for..
I feel like a new computer user on the phone trying to figure out a problem that seems so obvious.

Nick

[CrazyHorse]

Herbert, I use TexShop and am currently updated to the newest version. I looked at the log list of One page, but I am not sure what I am looking for. I go to the log list, and I have several options:
~/library/logs
/library/logs
/private/var/log
Section 8.2 Recip

I can see the PDF statistics. I am sorry to be so much trouble, but I don't understand what I am looking for..
I feel like a new computer user on the phone trying to figure out a problem that seems so obvious.

TeXShop is a gui and not the system like MacTeX or TeXLive.
After every latex or pdflatex run there exists a logfile
with the main file name and extension .log.

Herbert