How to use custom point style in plot?

Question

I am doing a dimensional reduction experiment, where a set of faces will be places onto a X-Y plane. I want to show the real face at each point in the plot (Example: Figure 10 at the page 476). Can I do this in R? Thank you.

Accepted Answer

You will probably need some add-on packages like `png` and `raster` to achieve this. So first up, make sure you have the packages loaded.

```
library(png)
library(raster)
```

Now, get an image (an awesome squiggle I made in ms paint - saved as `spotimg.png`):

Load the image into R and plot it:

```
pngimg <- readPNG("spotimg.png")
plot(NA,xlim=c(0,10),ylim=c(0,10))
rasterImage(pngimg,4.5,4.5,5,5)
```

The last 4 inputs to the `rasterImage` call give the coordinates of the image's boundary in the format `xleft, ybottom, xright, ytop`

And bingo, there's your image plotted where you specified.

How to use custom point style in plot?

Solution

Problem