Rectangle with color gradient fill

Rectangle with color gradient fill

gradient_rect(
  xleft,
  ybottom,
  xright,
  ytop,
  col,
  gradient = "x",
  border = par("fg"),
  ...
)

Arguments

xleft, ybottom, xright, ytop

numeric vectors indicating the position of sides of a rectangle, passed to graphics::rect(). Multiple rectangles may be defined.

col

character vector of colors used to fill the rectangles.

gradient

character string indicating the direction of color gradient, with two allowed values: "x" and "y".

border

character value indicating the color of border around the rectangle.

...

additional arguments are ignored.

Details

This function was inspired by the plotrix::gradient.rect() function in the plotrix R package. The function is simplified here, and requires a vector of colors in col.

See also

Other jam utility functions: blockArrowMargin(), find_colname(), fold_to_log2fold(), get_se_assaydata(), handle_highlightPoints(), log2fold_to_fold(), logAxis(), outer_legend(), points2polygonHull(), update_function_params(), update_list_elements()

Examples

jamba::nullPlot(xlim=c(0,5), ylim=c(0,5), xaxt="s", yaxt="s");
gradient_rect(xleft=1,
   ybottom=1,
   xright=2.5,
   ytop=2.5,
   col=jamba::getColorRamp("Reds", n=15))
gradient_rect(xleft=2.5,
   ybottom=2.5,
   xright=4,
   ytop=4,
   gradient="y",
   col=jamba::getColorRamp("Reds", n=15))