Rosling.bubbles {animation} | R Documentation |
In Hans Rosling's attractive talk “Debunking third-world myths with the best
stats you've ever seen”, he used a lot of bubble plots to illustrate trends
behind the data over time. This function gives an imitation of those moving
bubbles, besides, as this function is based on symbols
, we can
also make use of other symbols such as squares, rectangles, thermometers,
etc.
Rosling.bubbles(x, y, data, type = c("circles", "squares", "rectangles", "stars", "thermometers", "boxplots"), bg, xlim = range(x), ylim = range(y), main = NULL, xlab = "x", ylab = "y", ..., grid = TRUE, text = 1:ani.options("nmax"), text.col = rgb(0, 0, 0, 0.5), text.cex = 5)
x, y |
the x and y co-ordinates for the centres of the bubbles (symbols).
Default to be 10 uniform random numbers in [0, 1] for each single image
frame (so the length should be 10 * |
type, data |
the type and data for symbols; see |
bg, main, xlim, ylim, xlab, ylab, ... |
see |
grid |
logical; add a grid to the plot? |
text |
a character vector to be added to the plot one by one (e.g. the year in Rosling's talk) |
text.col, text.cex |
color and magnification of the background text |
Suppose we have observations of n individuals over
ani.options('nmax')
years. In this animation, the data of each year
will be shown in the bubbles (symbols) plot; as time goes on, certain trends
will be revealed (like those in Rosling's talk). Please note that the
arrangement of the data for bubbles (symbols) should be a matrix like
A_{ijk} in which i is the individual id (from 1 to n), j
denotes the j-th variable (from 1 to p) and k indicates the time
from 1 to ani.options('nmax')
.
And the length of x
and y
should be equal to the number of rows
of this matrix.
NULL
.
Yihui Xie
Examples at https://yihui.name/animation/example/rosling-bubbles/
TED talk: http://www.ted.com/talks/hans_rosling_shows_the_best_stats_you_ve_ever_seen.html