example of geom_contour() with function argument

Hi BFD,

?geom_contour() *does* have helpful examples. Your Google-foo is weak:
Searching for geom_contour brought me: http://ggplot2.tidyverse.
org/reference/geom_contour.html as the first result.

HTH
Ulrik

On Mon, 9 Oct 2017 at 08:04 Big Floppy Dog <bigfloppydog at gmail.com> wrote:

Can someone please point me to an example with geom_contour() that uses a
function? The help does not have an example of a function, and also  I did
not find anything from online searches.

TIA,
BFD


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How about geom_contour()?

Am So., 8. Okt. 2017, 20:52 schrieb Ranjan Maitra <maitra at email.com>:

Hi,

I am no expert on ggplot2 and I do not know the answer to your

question. I

looked around a bit but could not find an answer right away. But one
possibility could be, if a direct approach is not possible, to draw
ellipses corresponding to the confidence regions of the multivariate t
density and use geom_polygon to draw this successively?

I will wait for a couple of days to see if there is a better answer

posted

and then write some code, unless you get to it first.

Thanks,
Ranjan


On Sun, 8 Oct 2017 09:30:30 -0500 Big Floppy Dog <

bigfloppydog at gmail.com>

wrote:

Note: I have posted this on SO also but while the question has been
upvoted, there has been no answer yet.

https://stackoverflow.com/questions/46622243/ggplot-
plot-2d-probability-density-function-on-top-of-points-on-ggplot

Apologies for those who have seen it there also but I thought that

this

list of experts may have someone who knows the answer.

I have the following example code:



require(mvtnorm)
require(ggplot2)
set.seed(1234)
xx <- data.frame(rmvt(100, df = c(13, 13)))
ggplot(data = xx,  aes(x = X1, y= X2)) + geom_point() +

geom_density2d()

It yields a scatterplot of X2 against X1 and a KDE contour plot of the
density (as it should).

My question is: is it possible to change the contour plot to display
the contours

of a two-dimensional density function (say dmvt), using ggplot2?

The remaining figures in my document are in ggplot2 and therefore I
am looking for a ggplot2 solution.

Thanks in advance!

BFD

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