## Wednesday, October 29, 2008

### Grade Stats

I have posted a file that contains the grade statistics for all quizzes, tests, and assignments that have been graded so far. It can be found here.

### Graphs Due Date Confusion

There was some conflicting information about the due date of the Graphs assignment. It will be due (without the use of late days) on Thursday, Nov 13. Frontdesk and the portal should be fixed with the correct due date.

## Sunday, October 26, 2008

### Schedule Error

On the schedule, Quiz 4 was listed for this Wednesday (that's an error). It will occur at some point after the midterm. The course staff is deciding whether to give out 4 or 5 quizzes total (you will be able to drop the lowest either way).

## Saturday, October 25, 2008

### Tony's office hours

For the next two weeks, I will hold my office hours Monday at noon instead of Thursday at 1:30. Specifically, I will have office hours Oct 27 and Nov 3 instead of Oct 30 and Nov 6.

### +/- for mid-semester grades

To give you a more precise view of your mid-semester grade, we have entered a new graded item in FrontDesk called "midsemester" that shows your grade with +/-. You will need to map the number reported on FrontDesk to the letter grade with the following table:

10: A+

9: A

8: A-

7: B+

6: B

5: B-

4: C+

3: C

2: C-

1: D

0: R

10: A+

9: A

8: A-

7: B+

6: B

5: B-

4: C+

3: C

2: C-

1: D

0: R

## Wednesday, October 22, 2008

### Theory question 5 removed from compression homework

Theory

**question**5 is now removed from the Compression homework. After several student questions about the problem, the course TAs and instructors decided that the**question**was poorly worded and unnecessarily confusing. All students will receive full credit for this**question**.For those of you who are curious the answer is posted on the discussion page here.

- Kami### BW Transform Example

I've posted an example of transformed ASCII text to the discussion board:
http://groups.google.com/group/cmu-15-211-discuss/browse_thread/thread/3dc786ea677309c6

## Monday, October 13, 2008

### Office Hours Relocated

Since there are a ton of people on the 8th floor, I'm moving my office hours to the 7th floor. Notes were left on the whiteboards of the 8th floor.

## Sunday, October 12, 2008

### Quiz 3 in Recitation

In this weeks recitation, Weds 15 Oct, the third quiz will be given. Anything from the semester is fair game, but expect the majority of the material to be from after the midterm.

## Friday, October 10, 2008

### Supplementary Burrows Wheeler Notes

I created some notes on Burrows-Wheeler compression which explain both the compression and decompression algorithms in depth (the BWTransform, Move-to-Front, and Huffman). The notes take an input of length 7 round-trip. Please post any questions regarding the notes on the discussion board.

## Thursday, October 02, 2008

### Exam grades

Grades have been posted. The mean and median were 95 and 97, respectively. Contact your TA to find out where to pick up your exam.

## Wednesday, October 01, 2008

### Midterm Topics

This is a gentle reminder that all topics covered, including red black trees, are fair game for the midterm. We have posted slides for the red black tree lecture that aren't the exact same as the ones used in class, but you may find the wiki article as a helpful resource.

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