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

[Spencer Graves]

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 at 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]]
>>>>
>>>>______________________________________________
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>>>>
>>>>      
>>>
>>>--
>>>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 at 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
>>>
>>>    
> 
>