       Re: Logarithmic Plot

• To: mathgroup at smc.vnet.net
• Subject: [mg96497] Re: Logarithmic Plot
• From: "Drago Ganic" <dganic at vodatel.net>
• Date: Sat, 14 Feb 2009 03:14:46 -0500 (EST)
• References: <gmu8ma\$ghu\$1@smc.vnet.net> <gn11hj\$82r\$1@smc.vnet.net>

```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

"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
>

```

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