Creating scatter plot where symbol height/width is controlled by 2 variables

Question

I am very new to R, and am trying to create a scatter plot in ggplot2 which is in affect a scatter plot where each symbol is controlled in its width and height by two variables. I have come up with a work around using geom_errorbar and geo_errorbarh (code below) which is producing something along the lines I am looking for, but I want to be able to remove the error x/y mid cross lines and just leave a box for each datapoint, which I can colour in (I only need them to be in one colour). An example of the type of thing I am talking about is at: http://imbie.org/about-the-project/ice-sheet-mass-balance-measurements/

A subset of my data is (I hope I have used dput() correctly):

structure(list(Year = c(2000L, 1995L, 1986L, 1977L, 1977L, 1973L, 
1973L, 1969L, 1965L, 1961L), RSL = c(0.02, 0.02, 0, -0.01, -0.07, 
0, -0.11, -0.1, -0.16, -0.07), Age_error = c(2L, 1L, 5L, 4L, 
3L, 4L, 3L, 2L, 2L, 3L), RSL_error = c(0.03, 0.04, 0.03, 0.03, 
0.05, 0.03, 0.05, 0.05, 0.05, 0.03), plus_error = c(0.05, 0.06, 
0.03, 0.02, -0.02, 0.03, -0.06, -0.05, -0.11, -0.04), minus_error = c(-0.01, 
-0.02, -0.03, -0.04, -0.12, -0.03, -0.16, -0.15, -0.21, -0.1), 
plus_age = c(2002L, 1996L, 1991L, 1981L, 1980L, 1977L, 1976L, 
1971L, 1967L, 1964L), minus_age = c(1998L, 1994L, 1981L, 
1973L, 1974L, 1969L, 1970L, 1967L, 1963L, 1958L), total_RSLerror = c(0.06, 
0.08, 0.06, 0.06, 0.1, 0.06, 0.1, 0.1, 0.1, 0.06), total_Ageerror = c(4L, 
2L, 10L, 8L, 6L, 8L, 6L, 4L, 4L, 6L)), .Names = c("Year", 
"RSL", "Age_error", "RSL_error", "plus_error", "minus_error", 
"plus_age", "minus_age", "total_RSLerror", "total_Ageerror"), class = "data.frame", 
row.names = c  ("1", "2", "3", "4", "5", "6", "7", "8", "9", "10"))

The code I have currently got is:

    ggplot(data, aes(x=Year, y=RSL)) + geom_errorbar(aes(ymin=minus_error, ymax=plus_error, width=total_Ageerror)) + geom_errorbarh(aes(xmax=plus_age, xmin=minus_age, height=total_RSLerror)) + theme_bw()

Thank you ever so much in anticipation. Please let me know if I need to send anything else or if I have inputed this incorrectly.

possible duplicate of How to use different shapes for every point in ggplot — agstudy
– agstudy, Commented Jun 24, 2013 at 14:49

Didzis Elferts · Accepted Answer · 2013-06-24 14:46:44Z

4

You can achieve it with geom_rect() and using your plus_ and minus_ variables as max and min coordinates (named your data as df).

ggplot(df,aes(xmin=minus_age,xmax=plus_age,ymin=minus_error,ymax=plus_error))+
  geom_rect(fill="green",color="black")

enter image description here

answered Jun 24, 2013 at 14:46

Didzis Elferts

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1 Comment

ahsat Over a year ago

You are an absolute legend Didzis. That is so much easier than I was trying to achieve. Thank you so so much.

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