setClass("class2",
slots = list(slot1 = "matrix"))
setClass("class1",
slots = list(slot1 = "class2",
slot2 = "character",
slot3 = "numeric"))
setClass("class3",
slots = list(slot1 = "character"))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.