I am plotting a 4 dimensional data set. Beyond the x-axis and y-axis, I want to represent the 3rd and the 4th dimension by rectangles of different width and height. Can I do this with ggplot? Thanks.
-
2Can you provide a reproducible example and detail the expected plot?agstudy– agstudy2013-02-06 02:01:49 +00:00Commented Feb 6, 2013 at 2:01
-
1@agstudy As I understand it, it's basically an x-y scatterplot where each point is a rectangle. The height and width of these rectangle points are mapped to two other variables. Getting the ratios right will be a nuisance and some data to work with would certainly speed things up.sebastian-c– sebastian-c2013-02-06 02:16:22 +00:00Commented Feb 6, 2013 at 2:16
-
@sebastian-c Yes, exactly. I've updated a draft.Ziyuan– Ziyuan2013-02-06 02:31:00 +00:00Commented Feb 6, 2013 at 2:31
Add a comment
|
2 Answers
Here is one approach:
dd <- data.frame(x = (x <- 1:10),
y = x + rnorm(10), width = runif(10,1,2), height = runif(10,1,2))
ggplot(data = dd) +
geom_rect(aes(xmax = x + width/2, xmin = x - width/2,
ymax = y + height/2, ymin = y - height/2),
alpha =0.2, color = rgb(0,114,178, maxColorValue=256),
fill = rgb(0,114,178, maxColorValue=256)) +
coord_fixed() +
theme_bw()
Comments
You can try something like this. I use
geom_pointwith shape =0 to simulate rectanglegeom_rectto create ractangle centered around the points
here my data (it would be better to provide some data)
d=data.frame(x=seq(1,10),
y=seq(1,10),
width=rep(c(0.1,0.5),each =5),
height=rep(c(0.8,0.9,0.4,0.6,0.7),each =2))
ggplot(data = d) +
geom_rect(aes(xmax = x + width, xmin = x-width,
ymax = y+height, ymin = y - height),
color = "black", fill = NA) +
geom_point(mapping=aes(x=x, y=y,size=height/width),
color='red',shape=0)+
theme_bw()
1 Comment
Ziyuan
Can I have the legend of both width and height?