Computer Lecture 5

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SOME OPERATIONS ON VECTORS AND MATRICES
Max function this function returns the maximum elements of an array.
1. M = max(A) returns the maximum elements of an array.
• If A is a vector, then max(A) returns the maximum of A.
• If A is a matrix, then max(A) is a row vector containing the maximum value of each column.

Example
>> A = [23 42 37 18 52];
>> M = max(A)
M = 52
>> X = [-2+2i 4+i -1-3i];
>> max(X)
ans = 4.0000 + 1.0000i

>> B = [2 8 4; 7 3 9]
B= 2×3

2 8 4
7 3 9

>>M = max(B)
M = 1×3

7 8 9

2. M = max(A,[],dim) returns the maximum element along dimension dim. For example, if A is a matrix, then max(A,[],2) is a column vector containing the maximum value of each row.

Example
>> A = [1.7 1.2 1.5; 1.3 1.6 1.99]
A = 2×3
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