class_notes16

class_notes16 - Engineering 3 Class 16 Today midterm...

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Engineering 3 – Class 16 Today: • midterm solutions? • more arrays • MATLAB functions Office Hours: Brendon 11am-12pm, Rm. 1117 E1 Antonio…today?
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So far: • arrays: scalars arranged in some logical structure • vectors: 1xn or nx1 arrays (eg. ‘row’ or ‘column’) Matricies are mxn arrays in MATLAB. A = [2, 4, 10; 16, 3, 7]; creates the matrix: Arrays = 7 3 16 10 4 2 A
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Array indicies are the row and column numbers of an element. row number always listed first A(4,2) = A(2,3) = Array Addressing [] 9 6 7 3 = V Colon operator used to select ‘subarrays’ V(:) = A(:,3) = A(2:3, 2:3)= = 9 7 3 8 4 10 4 6 2 A not defined 8
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clear(): use to remove all variables from workspace. Place at the beginning of m-files to avoid errors Useful Functions Function Description length(A) returns # of elements if A is a vector, or largest dimension linspace(a,b,n) creates a row vector of n regularly spaced values between a and b max(A) Returns the largest element if A is a vector.
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class_notes16 - Engineering 3 Class 16 Today midterm...

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