rect_bin: Bin data into rectangles (2d).
In hadley/densityvis: Common interface to a range of density calculations.

Bin data into rectangles (2d).

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rect_bin(x, y, weight, xbreaks=interval_breaks(),
    ybreaks=interval_breaks(), na.rm=FALSE, xopen="right",
    yopen="right")

`x`	a numeric vector of x positions
`y`	a numeric vector of y positions
`weight`	`NULL` or a numeric vector providing weights for each observation
`xbreaks`	a break function, or a vector of break points that should enclose all x values.
`ybreaks`	a break function, or a vector of break points that should enclose all y values.
`xopen`	are x intervals open on the `"left"` or `"right"`.
`yopen`	are y intervals open on the `"left"` or `"right"`.
`na.rm`	If `TRUE` missing values will be silently removed, otherwise they will be removed with a warning.

x <- rnorm(1e5)
y <- rnorm(1e5)
bins <- rect_bin(x, y)
plot(bins)

# Specifying bin widths
rect_bin(x, y, 
xbreaks = interval_breaks(binwidth = 0.5), 
ybreaks = interval_breaks(binwidth = 0.5))