R help - Mar 2012 - to Michael ... Re: How do I do a pretty scatter plot using ggplot2?

Hi Michael,

I am trying the solution you've suggested below:

DAT <- data.frame(x = runif(1000, 0, 20), y = rnorm(1000))
DAT$xbin <- with(DAT, cut(x, seq(0, 20, 2)))

p <- ggplot(DAT, aes(x = x, y = y)) + geom_point(alpha = 0.2) +
stat_quantile(aes(colour = ..quantile..), quantiles = seq(0.05, 0.95,
by=0.05)) + facet_wrap(~ xbin, scales = "free")
print(p)
-----------------------

But my big problem is: I don't know how to modify the code above to do it
for "equal # of points" in each bin along the x-axis?

i.e. the 2nd case in the original problem:

2. Equal number of observations in each bin;

?

Thanks a lot!

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And also, no matter how I changed the "quantiles = seq(0.05, 0.95,
by=0.05))" line,

the number of lines in each bin and the number of legends on the right side
of the each plot are different...

What's the catch? Am I missing something here?

I thought the number of quantile lines and the number of legends should be
exactly the same, no?

On Sun, Mar 11, 2012 at 8:54 PM, Michael <comtech.usa@gmail.com> wrote:
> Hi Michael,
>
> I am trying the solution you've suggested below:
>
> DAT <- data.frame(x = runif(1000, 0, 20), y = rnorm(1000))
> DAT$xbin <- with(DAT, cut(x, seq(0, 20, 2)))
>
> p <- ggplot(DAT, aes(x = x, y = y)) + geom_point(alpha = 0.2) +
> stat_quantile(aes(colour = ..quantile..), quantiles = seq(0.05, 0.95,
> by=0.05)) + facet_wrap(~ xbin, scales = "free")
> print(p)
> -----------------------
>
> But my big problem is: I don't know how to modify the code above to do
it
> for "equal # of points" in each bin along the x-axis?
>
> i.e. the 2nd case in the original problem:
>
> 2. Equal number of observations in each bin;
>
> ?
>
> Thanks a lot!
>
>        [[alternative HTML version deleted]]
>
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http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
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>
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