Here is where you should generally post your questions or queries about topics in the course. Everything from how to approach questions, what alternative methods or graphics seem most relevant in situations you describe, what sources might be recommended for more study of particular topics to how to use R, or edit code, to overcome hurdles? You should expect not just to post questions, but also to try your hand at answers. The procedure will work like this: place your question in the Comment box, and expect answers to follow in the ensuing comments.