• NEW partners!

Overview

• Preliminaries.
  • Admin.
  • Upcoming Work.
  • Extra Credit.
  • Questions.
• Lab.

Preliminaries

Admin

• Friday the 13th falls on Friday this week. Be careful!
• Review sessions 9am, 1:15pm, and 8:00pm Thursday.
  • I can answer general exam questions in the daytime sessions.
• Office hours again mostly normal (MTWF 10:00 plus afternoons).
  • http://rebelsky.youcanbook.me
• "How do you get down off an elephant? You don't. You get down off a duck."

Upcoming Work

• Exam 2.
  • Electronic version due 10:30 p.m. Thursday the 12th.
  • Epilogue due 11:00 p.m. on Thursday the 12th.
  • Printed version due start of class on Friday the 13th.
  • Exceptions made for people undergoing too much work or too much outside stress.
• Reading for Friday:
  • Numeric Recursion
• Quiz Friday!

Extra Credit Opportunities

Academic

• CANCELLED: Town Hall on Town Halls, noon or 7:30 p.m. today
• Amy Johnson '85 concert tonight at 7:30 p.m. in Herrick.
• CS Table Friday - Debrief from Tapia Celebration of Diversity in Computing
• Post-break: April 1 Scholars Convocation on Implicit Bias.
• 7:30 p.m. on April 2: Gender as a Process. EE talks afterwards

Peer Support (Afternoon Section)

• Belly Dancing Club Wednesday, 7-8 p.m. in Bucksbaum Dance Studio

Other Fun Activities

• Julia's radio show, "The Hot Box". Wednesday night/Thursday morning 1:00-2:00 a.m. THAT'S TONIGHT.

Questions

Can you help me think about the tests in problem 6?

You will need to write tests that use particular colors, colors which you will normally create with irgb.

Your main check is "Did irgb-classify classify it correctly?"

For example

    (define irgb-classify-tests
      (test-suite "Tests of irgb-classify"
        (test-case "tests of greenish colors"
                   (check-equal? (irgb-classify (irgb 200 201 200))
                                 'greenish
                                 "large, close, values; red=blue; green dominates"))
        (test-case "tests of reddish colors"
         )))

How many check-equal? calls are enough?

Minimum of 12. Maximum of 32,781. But closer to 12 is fine.

Do I have to write 6P-style documentation for irgb-classify or irgb-classify-tests?

No.

I'm getting a weird "quark" error in problem 8. Can you tell me why?

You are probably generating a y value outside of the valid range. Try generating the list of y values and scanning it for negative numbers or values greater than height-1.

Computers are sentient and malicious.

Lab

If I try to model largest on a procedure from the reading, what procedure should that be?

I like drawings-leftmost.

Do we have a daily lab pun?

You can rename irgb-all-bright? to irgb-secretary-of-state?