Database Lab Day 2

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• Misc
  • Extended Math Learning Center hours for finals
    • Opening 9:30 (instead of 10:30) AM weekdays
    • 7:00 - 10:00 PM Sunday, May 8
  • Final
    • Sample exam from last semester available on “Exercises” page
    • Friday, May 6, 8:00 AM
    • In our classroom
    • Comprehensive, but emphasizing material since 2nd hour exam (e.g., vectorization, 3D arrays, images, cell arrays, strings, files, etc.)
    • Designed for 2 hours, you’ll have 2 1/2 +
    • Rules and format similar to hour exams
    • Donuts and cider
  • SOFIs
    • Helpful to me in planning future offerings of this course, especially comments on text
    • 10 filled out so far!
    • But more would be welcome
• Database Lab or Mad Libs
  • isequal function
    • Completely generic way to compare two values for equality
      

      >> x = 1; y = 4;
      >> x == y
      ans =
           0
      >> z = 4;
      >> y == z
      ans =
           1
      >> r = 'abcd'; s = 'xyz'; t = 'xyz';
      >> r == s
      Error using ==
      Matrix dimensions must agree. 
      >> strcmp( r, s )
      ans =
           0
      >> strcmp( s, t )
      ans =
           1
      >> strcmp( s, x )  % Surprising that strcmp works between a string and number at all
      ans =
           0
      >> isequal( x, y )
      ans =
           0
      >> isequal( y, z )
      ans =
           1
      >> isequal( r, s )
      ans =
           0
      >> isequal( s, t )
      ans =
           1
      >> % isequal even works on entire cell arrays
      >> isequal({1,'hello'}, {2,'hello'} )
      ans =
           0
      >> isequal( {1,'hello'}, {1,'hello'} )
      ans =
           1

  • Other questions?

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