Re: [R] Plotting contour & filled.contour in one graph

From: Abd Rahman Kassim <rahmank_at_frim.gov.my>
Date: Tue 14 Feb 2006 - 08:25:09 EST

Dear Spencer,

Thanks for the assistance and the website. It will be very helpful for my future code programming on graph in R.

Abd. Rahman

>
> Hi, Michael:
>
> I'm sure the example would be clearer AND more interesting if you used
> real data AND accompanied it with a description like you gave below. To
> help motivate the usage, you could add a few words of interpretation,
> e.g., that if you want both z and zz less than 2, x and y must be in the
> upper right corner.
>
> Thanks for this.
> spencer graves
>
> Michael Prager wrote:
>> GG
>>
>> Yes, gladly. It is an idealized example of the following data situation:
>> There are two control or "independent variables." They are represented
>> here as x and y, on the horizontal and vertical axes respectively. There
>> are two different responses or "dependent" variables plotted as different
>> types of contours. The filled contours show response z. The heavy lines
>> show response zz.
>>
>> Thus such a plot displays two different responses from a two-dimensional
>> range of conditions. As an example, in fishery biology, x might be the
>> age at which fish are first subject to capture, y might be the fishing
>> mortality rate (intensity) applied, z might be the resulting yield per
>> fish, and zz might be the resulting spawning per fish. There is usually
>> a trade-off between yield and spawning potential, and such a graph (if
>> done with real data) allows one to look at that trade-off. The OP seemed
>> to be seeking a way of contouring two responses against two independent
>> variables, and that's what this graph does.
>>
>> Is that clearer? Would the graph would be better if I used real data?
>>
>> MHP
>>
>>
>>
>> Gabor Grothendieck wrote on 2/12/2006 11:31 AM:
>>
>>>Could you walk us through, in detail, what that graph is showing?
>>>
>>>
>>>On 2/12/06, Michael Prager <Mike.Prager@noaa.gov> wrote:
>>>
>>>>Besides the answers you already have, you might look at my "4D" graph
>>>>example (with code) on the R Graphics Gallery:
>>>>
>>>>http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=90
>>>>
>>>>I think it does exactly what you are asking, and therefore it might fit
>>>>your needs with only slight code modification.
>>>>
>>>>Mike Prager
>>>>
>>>>
>>>>Abd Rahman Kassim wrote on 2/12/2006 11:12 PM:
>>>>
>>>>>Dear All,
>>>>>
>>>>>I have a question on overlaying a filled.contour (e.g. on soil
>>>>>properties data) and contour (by elevation) in one graph. Both have the
>>>>>same z matrix dimension. I'm able to overlay both graph, but the plots
>>>>>dimension did not overlap well on the same plots. How can I have both
>>>>>filled.contour and contour on the same graph? The commands that I have
>>>>>written are as follows:
>>>>>
>>>>>filled.contour(0:15,0:10,t(matrix(Total.C,nrow=11,ncol=16)))
>>>>>contour(0:15,0:10,as.matrix(elev),add=T)
>>>>>
>>>>>Thanks for anay assistance.
>>>>>
>>>>>Regards.
>>>>>
>>>>>
>>>>>Abd Rahman Kassim
>>>>>Forest Research Institute Malaysia
>>>>>Kepong 52109
>>>>>Selangor, MALAYSIA
>>>>>
>>>>>*****************************************
>>>>>
>>>>>
>>>>>*****************************************
>>>>> [[alternative HTML version deleted]]
>>>>>
>>>>>______________________________________________
>>>>>R-help@stat.math.ethz.ch mailing list
>>>>>https://stat.ethz.ch/mailman/listinfo/r-help
>>>>>PLEASE do read the posting guide!
>>>>>http://www.R-project.org/posting-guide.html
>>>>>
>>>>>
>>>>
>>>>--
>>>>Michael H. Prager, Ph.D.
>>>>Population Dynamics Team
>>>>NOAA Center for Coastal Habitat and Fisheries Research
>>>>NMFS Southeast Fisheries Science Center
>>>>Beaufort, North Carolina 28516 USA
>>>>http://shrimp.ccfhrb.noaa.gov/~mprager/
>>>>
>>>>______________________________________________
>>>>R-help@stat.math.ethz.ch mailing list
>>>>https://stat.ethz.ch/mailman/listinfo/r-help
>>>>PLEASE do read the posting guide!
>>>>http://www.R-project.org/posting-guide.html
>>>>
>>>>
>>
>>
>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Mon Feb 13 16:26:45 2006

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