?quantile on the individual bins, make your deciles, then plot the ten series as usual with your x values at the midpoint of the bins.

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On Wed, 14 Mar 2012, David Winsemius wrote:


On Mar 14, 2012, at 11:33 AM, Michael wrote:

How to use ggplot to do the binned quantile plots(one type of scatter plot)?

More like a quantile regression plot.


Hi all,

I have done scatter plot: plot(x, y).

Now I wanted to do binned quantile plots... can ggplot2 help me?

For example, we bin x data into 10 bins.

For each bin, we draw the 10 deciles of the corresponding y data in that
bin as points/dots.

And then accross all bins, we would like to connect the corresponding
decile points/dots together(something like equi-quantile or equi-decile
curves)...

How do I do that in R or ggplot2? Is there an existing function/command
that can do this?

I'm not aware of it if there is. But I agree that it can be a very informative display of data. I do such plots on data structures generated using tapply with age, sex categories and quantile() to generate a value. It gets kind of hairy with the list structure that results but if you have a more simple data situation it will probably be more straightforward, and you should post it.

        [[alternative HTML version deleted]]

And you should learn to post in plain text

PLEASE do read the posting guide http://www.R-project.org/posting-guide.html

And you should read the Posting Guide.

and provide commented, minimal, self-contained, reproducible code.


And I already said that.

--

David Winsemius, MD
West Hartford, CT

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