Function adapted from from Marc in the box to add a png picture to a plot. Original function in: https://stackoverflow.com/questions/27800307/adding-a-picture-to-plot-in-r
add_image(obj, x = NULL, y = NULL, width = NULL, interpolate = TRUE)
| obj | an image file imported as an array (e.g. png::readPNG, jpeg::readJPEG) |
|---|---|
| x | mid x coordinate for image |
| y | mid y coordinate for image |
| width | width of image (in x coordinate units) |
| interpolate | Logical. Passed to graphics::rasterImage. Indicates whether to apply linear interpolation to the image when drawing. |