Using the C++ Math Library

Elementary Matrices and Matrix Manipulation

Elementary Matrices 

Function	Purpose
eye	Identity matrix.
linspace	Linearly spaced vector.
logspace	Logarithmically spaced vector.
meshgrid	X and Y arrays for 3-D plots.
ones	Matrix of 1's.
rand	Uniformly distributed random numbers.
randn	Normally distributed random numbers.
zeros	Matrix of 0's.

Basic Array Information 

Function	Purpose
disp	Display text or matrix
isempty	True for empty matrix.
isequal	True for input arrays of the same type, size, and contents.
islogical	True for logical arrays.
isnumeric	True for numeric arrays.
length	Length of vector.
logical	Convert numeric values to logical values.
ndims	Number of dimensions (always 2).
size	Size of matrix.

Matrix Manipulation 

Function	Purpose
cat	Concatenate arrays.
diag	Create or extract diagonals.
fliplr	Flip matrix in the left/right direction.
flipud	Flip matrix in the up/down direction.
ipermute	Inverse of permute.
permute	Permute array dimensions.
repmat	Replicate and tile an array.
reshape	Change size.
rot90	Rotate matrix 90 degrees.
shiftdim	Shift dimensions.
tril	Extract lower triangular part.
triu	Extract upper triangular part.

Special Constants 

Function	Purpose
computer	Computer type.
eps	Floating-point relative accuracy.
flops	Floating point operation count. (Not reliable in stand-alone applications.)
inf	Infinity.
nan	Not-a-Number.
pi	3.1415926535897....
realmax	Largest floating-point number.
realmin	Smallest floating-point number.

Specialized Matrices 

Function	Purpose
compan	Companion matrix.
hadamard	Hadamard matrix.
hankel	Hankel matrix.
hilb	Hilbert matrix.
invhilb	Inverse Hilbert matrix.
magic	Magic square.
pascal, pascal_func	Pascal matrix.
rosser	Classic symmetric eigenvalue test problem.
toeplitz	Toeplitz matrix.
vander	Vandermonde matrix.
wilkinson	Wilkinson's eigenvalue test matrix.

Operators and Special Functions

Elementary Math Functions