Midterm 2 covers Chapters 8-13 of the book.  Below is a list of some of the important topics in those chapters.  Caveat: this is not necessarily an exhaustive list of possible topics on
the exam.

2D Arrays - Advanced concepts
- basic properties: length, ndims, numel, size
- elementary arrays: zeros, ones, eye, diag
- Array manipulation: fliplr, flipud, rot90, tril, triu
- repmat - tiling an array
- reshape - reshaping an array
- find
- sort and sortrows
- logical functions for arrays
  - type: ischar, isnumeric, isinteger, isfloat, islogical, isreal, isa
  - characteristics: isscalar, isvector, iscolumn, ismatrix, isempty
  - determine indices satisfying property: isprime, isfinite, isinf, isnan
  - all, any
  - ismember
- array arithmetic operations
  - elementwise 
    - plus +, minus -
    - times .*, rdivide ./
    - power .^
  - matrix
    - mtimes *, mrdivide /, mldivide \
    - mpower ^
    - transpose .', ctranspose '
- linear algebra functions
  - det, eig, inv, trace, norm, diag
- solving a system of linear equations with Matlab
  - Ax = b
  - solve as A \ b
- 2D functions
  - rand, randi
  - mean, std, median, mode, max, min, range, sum

Branches
- if-else-end
- if-elseif-else-end
- switch-case-otherwise-end

Loops
- while-end
- for-end
- break

Functions
- functions handles
- anonymous functions
- local functions
- nested functions
- scope of variables
- global variable
- persistent variable
- recursion
- nargin

Images/Plots
- 3D arrays
- RGB image
- indexed image
- image file ops
- 3D line plot
- meshgrid
- surf, mesh, contour
- scatter
- animation using pause

Cell arrays and Structure arrays
- constructing cell arrays
- cell indexing and content indexing of cell arrays
- structures
- comma separated lists