sqbin | R Documentation |
The sqbin
function calculates frequencies in xy bins
sqbin(x, y, xint = NULL, yint = NULL, nxbin = 50, nybin = 50)
x |
a vector of x values |
y |
a vector of y values |
xint |
a vector of x intervals (end values). Defaults to values as specified
by |
yint |
a vector of y intervals (end values). Defaults to values as specified
by |
nxbin |
number of x bins. Default=50. Not used when |
nybin |
number of y bins. Default=50. Not used when |
A matrix containing interval mid points (x,y
), bin frequencies (z
),
and intervals (xint, yint
).
# Synthetic data set.seed(1) n <- 1e6 x <- runif(n, min=-3, max=3) y <- 4*x^2 + rnorm(n, sd=5) sqbin.res <- sqbin(x,y) # Plot op <- par(mar=c(4,4,1,1)) image(sqbin.res, col=jetPal(20)) par(op) # Plot with legend op <- par(no.readonly = TRUE) lo <- matrix(1:2, nrow=1, ncol=2) layout(lo, widths=c(4,1), heights=c(4), respect=TRUE) par(cex=1) par(mar=c(3,3,1,1)) image(sqbin.res, col=jetPal(20)) par(mar=c(3,0,1,3)) imageScale(sqbin.res$z, col=jetPal(20), axis.pos=4) par(op)
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