Nothing
addem <-
function(startingvals,xmatlen,ymatlen,data){
x<-startingvals[1];
y<-startingvals[2];
#print("here");
#print(data[x:(x+xmatlen-1),y:(y+ymatlen-1)]);
sum(data[x:(x+xmatlen-1),y:(y+ymatlen-1)])^2;
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.