Calculate scatter plot point density

Calculate scatter plot point density

Usage

jamCalcDensity(x, nbin, bandwidth = NULL, range.x)

Arguments

x

numeric matrix with two columns representing x,y coordinates.

nbin

integer number of bins to subdivide the scatterplot, expanded to length 2 to accommodate x and y axis bins.

bandwidth

numeric or NULL representing the bandwidth used for point density determination.

range.x

numeric vector length 2 representing the range of values to consider for point density.

Value

list with elements used internally by plotSmoothScatter(), with: x1, x2, fhat, bandwidth.

Details

This function is called internally by plotSmoothScatter(), and is an equivalent replacement for grDevices non-exported function .smoothScatterCalcDensity(), understandably a requirement by CRAN. A package should not rely on another package hidden function.

See also

Other jam internal functions: handleArgsText(), make_html_styles(), make_styles(), smoothScatterJam()

Examples

sdim(jamCalcDensity(cbind(x=rnorm(1000) + 4, y=rnorm(1000) + 4), nbin=30))
#>           rows cols   class class_v2
#> x1          30      numeric     <NA>
#> x2          30      numeric     <NA>
#> fhat        30   30  matrix    array
#> bandwidth    1    2  matrix    array