R help - Feb 2009 - How to plot image of contour in percent?

I have searched this forum with keywords contour and percent, it only
give one irrelevent result.
My problems is how to plot contour in percent.
In my figure, I have use kde2d to generate density of an array with
two dimension point.
Using image and contour could plot it.
But the line contour generated represent absolute value of population,
not how much pecent point within this cycle.
So, i there any function which could accomplish it?To generate a cycle
which could tell me how much percent of points lies in this cycle.
Thank you for your attention

On Feb 15, 2009, at 7:55 AM, yk wrote:
> I have searched this forum with keywords contour and percent, it only
> give one irrelevent result.
> My problems is how to plot contour in percent.
> In my figure, I have use kde2d to generate density of an array with
> two dimension point.
> Using image and contour could plot it.
> But the line contour generated represent absolute value of population,
> not how much pecent point within this cycle.
> So, i there any function which could accomplish it?To generate a cycle
> which could tell me how much percent of points lies in this cycle.
> Thank you for your attention
One way to approach it would be to
-create a function that returns the density for each x and y
-assign a density score to each case
-determine the quantiles
-draw the pseudo-3d or contour plot with colors or levels at the  
desired proportion.

I think I have seen worked examples of this process, so it may be that  
searching on "quantile" instead of "percent" would be more
successful.

-- 
David Winsemius

I was thinking of a more focused search including the terms contour  
and either r-help or r-project,  but not one restricted to  
GoogleGroups,  ,,, more along the lines of:

http://www.google.com/search?hl=en&rlz=1B3GGGL_enUS278US278&q=r-help+quantile+contour&start=20&sa=N

or...

http://www.google.com/search?hl=en&rlz=1B3GGGL_enUS278US278&q=r-project+quantile+contour&btnG=Search



One does not always get the same result. This morning when I tested  
that strategy, I got these hits:

http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=104

and also found:

http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=112

Both of which seemed of use for such a purpose.

-- 
David Winsemius

On Feb 15, 2009, at 9:48 PM, yuankun shi wrote:
> There is misunderstanding between us.
> I have search the groups with key words quantile and found this  
> article
>
http://groups.google.com/group/r-help-archive/browse_thread/thread/9f0d6e72702de11c/e2eb078d0c6f1e5f?hl=en&lnk=gst&q=quantile#e2eb078d0c6f1e5f
> It talked about to use quantile to generate a contour with desired  
> proportion, but this probortion stand for how much percent of max  
> value of population.
> While my problem is how to get the proportion of particles lies in  
> this cycle generated by contour not the proportion of z axis
>
> 2009/2/15 David Winsemius <dwinsemius@comcast.net>
>
> On Feb 15, 2009, at 7:55 AM, yk wrote:
>
> I have searched this forum with keywords contour and percent, it only
> give one irrelevent result.
> My problems is how to plot contour in percent.
> In my figure, I have use kde2d to generate density of an array with
> two dimension point.
> Using image and contour could plot it.
> But the line contour generated represent absolute value of population,
> not how much pecent point within this cycle.
> So, i there any function which could accomplish it?To generate a cycle
> which could tell me how much percent of points lies in this cycle.
> Thank you for your attention
>
> One way to approach it would be to
> -create a function that returns the density for each x and y
> -assign a density score to each case
> -determine the quantiles
> -draw the pseudo-3d or contour plot with colors or levels at the  
> desired proportion.
>
> I think I have seen worked examples of this process, so it may be  
> that searching on "quantile" instead of "percent" would
be more
> successful.
>
> -- 
> David Winsemius
>

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