Re: Logarithmic Plot

*To*: mathgroup at smc.vnet.net*Subject*: [mg96502] Re: Logarithmic Plot*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sun, 15 Feb 2009 03:19:23 -0500 (EST)*Organization*: The Open University, Milton Keynes, UK*References*: <gmu8ma$ghu$1@smc.vnet.net> <gn11hj$82r$1@smc.vnet.net> <gn5uhn$h12$1@smc.vnet.net>

In article <gn5uhn$h12$1 at smc.vnet.net>, "Drago Ganic" <dganic at vodatel.net> wrote: > Hi Jean-Marc , > I think there is a slight error in your comments. I have corrected them > here: > > ListPlot[data] (*regular x,regular y*) > ListLogPlot[data] (*regular x, log y*) > ListLogLinearPlot[data] (*log x, regular y*) > ListLogLogPlot[data] (*log x,log y*) > > > Greetings, > Drago Well spotted, Drago! Thank you for having fixed my comments that now appear in the correct order. Best regards, --Jean-Marc > "Jean-Marc Gulliet" <jeanmarc.gulliet at gmail.com> wrote in message > news:gn11hj$82r$1 at smc.vnet.net... > > In article <gmu8ma$ghu$1 at smc.vnet.net>, > > Ben Casey <ben.a.casey at gmail.com> wrote: > > > >> Hi, I could use some help. Basically I have imported a set of data > >> points > >> (concentration of compound vs. time) and plotted it in Mathematica. Part > >> of > >> my assignment now is to post the Log[concentration] vs. time. Is there > >> an > >> easy command to do this in Mathematica? I've played around and looked in > >> the > >> doc center but the only way I can figure to do it is manually calculate > >> the > >> values and then plot them. There must be a better way. > > > > The function you are looking for is called *ListLogLinearPlot* (at least > > in Mathematica 6.xx and above). It belongs to a whole family of > > functions designed to automatically convert the x-, y-, or both, data to > > logarithmic scales. (Note that w/o the List prefix, the same plotting > > functions exist for drawing expressions.) For instance, > > > > data = Table[{n, Sqrt[n]}, {n, 100}]; > > > > ListPlot[data] (* regular x, regular y *) > > ListLogPlot[data] (* log x, regular y *) > > ListLogLinearPlot[data] (* regular x, log y *) > > ListLogLogPlot[data] (* log x, log y *) > > > > Regards, > > --Jean-Marc > >