[R] combination of scatterplot and image graph

[Romain François]

Hello,

you can fit a density using MASS::kde2d and then do a contour plot 
(?contour) and scatterplot your data :

x <- rnorm(500)
y <- rnorm(500)
require(MASS)
d <- kde2d(x,y,n=50)
image(d)
contour(d,add=T)
points(x,y,pch=20)

Romain.

bogdan romocea a écrit :

>Dear R users,
>
>I'm interested in a combination of a scatterplot and an image graph.
>I have two large vectors. Because in the scatterplot some areas are
>sparsely and others densely populated, I want to see the points, and
>I also want their color to be changed based on their density (similar
>to a heat map). Is there a function that can do that?
>
>Thank you,
>b.
>  
>
-- 
Romain FRANCOIS : francoisromain at free.fr
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Etudiant en 3eme année
Institut de Statistique de l'Université de Paris (ISUP)
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