rbokeh (version 0.4.2)

ly_image_url: Add an "image_url" layer to a Bokeh figure

Description

Renders raster images from URLs at provided coordinates

Usage

ly_image_url(fig, x = 0, y = 0, data = figure_data(fig), w = 10, h = 10, image_url, dilate = TRUE, anchor = "top_left", angle = 0, lname = NULL, lgroup = NULL, visible = TRUE)

Arguments

fig

figure to modify

x

x coordinates

y

y coordinates

data

an optional data frame, providing the source for inputs x, y, and other properties

w, h

values or field names of width and height of image

image_url

values or field name of image URLs

dilate

logical - whether to dilate pixel distance computations when drawing

anchor

where the image is anchored to with respect to x and y

angle

values or field name of the angle to rotate the image, in radians

lname

layer name

lgroup

layer group

visible

should the layer be visible?

See Also

Other layer functions: ly_abline, ly_annular_wedge, ly_annulus, ly_arc, ly_bar, ly_bezier, ly_boxplot, ly_contour, ly_crect, ly_curve, ly_density, ly_hist, ly_image, ly_lines, ly_map, ly_multi_line, ly_oval, ly_patch, ly_points, ly_polygons, ly_quadratic, ly_quantile, ly_ray, ly_rect, ly_segments, ly_text, ly_wedge

Examples

url <- c("http://bokeh.pydata.org/en/latest/_static/bokeh-transparent.png",
  "http://developer.r-project.org/Logo/Rlogo-4.png")

ss <- seq(0, 2*pi, length = 13)[-1]
ws <- runif(12, 2.5, 5) * rep(c(1, 0.8), 6)

imgdat <- data.frame(
  x = sin(ss) * 10, y = cos(ss) * 10,
  w = ws, h = ws * rep(c(1, 0.76), 6),
  url = rep(url, 6)
)

p <- figure(xlab = "x", ylab = "y") %>%
  ly_image_url(x, y, w = w, h = h, image_url = url, data = imgdat,
    anchor = "center") %>%
  ly_lines(sin(c(ss, ss[1])) * 10, cos(c(ss, ss[1])) * 10,
    width = 15, alpha = 0.1)
p