Julia for MATLAB Users/Core Language/Mathematics
Mathematics
[edit | edit source]Most of the below functionality described in the core MATLAB Mathematics documentation has equivalent, often identical, functionality (more often that not with the same syntax) described in the Base.Mathematics section of the Julia manual. Specific equivalents are identified below; often these have the same names as in Matlab, otherwise the Julia equivalent name is noted.
Elementary Math
[edit | edit source]Arithmetic
[edit | edit source]See Arithmetic Operators in the Julia manual. Note that in Julia the operators are themselves methods and can be used anywhere a method can. See e.g. the example in the documentation for Base.map
.
plus
Addition
[edit | edit source]uplus
Unary plus
[edit | edit source]minus
Subtraction
[edit | edit source]uminus
Unary minus
[edit | edit source]times
Element-wise multiplication
[edit | edit source]rdivide
Right array division
[edit | edit source]ldivide
Left array division
[edit | edit source]power
Element-wise power
[edit | edit source]mtimes
Matrix Multiplication
[edit | edit source]mrdivide
Solve systems of linear equations for
[edit | edit source]mldivide
Solve systems of linear equations for
[edit | edit source]mpower
Matrix power
[edit | edit source]cumprod
Cumulative product
[edit | edit source]cumsum
Cumulative sum
[edit | edit source]diff
Differences and Approximate Derivatives
[edit | edit source]movsum
Moving sum
[edit | edit source]prod
Product of array elements
[edit | edit source]sum
Sum of array elements
[edit | edit source]ceil
Round toward positive infinity
[edit | edit source]fix
Round toward zero
[edit | edit source]floor
Round toward negative infinity
[edit | edit source]idivide
Integer division with rounding option
[edit | edit source]mod
Remainder after division (modulo operation)
[edit | edit source]rem
Remainder after division
[edit | edit source]round
Round to nearest decimal or integer
[edit | edit source]bsxfun
Apply element-wise operation to two arrays with implicit expansion enabled
[edit | edit source]Trigonometry
[edit | edit source]See Trigonometric and Hyperbolic functions in the Julia manual.
sin
Sine of argument in radians
[edit | edit source]sind
Sine of argument in degrees
[edit | edit source]asin
Inverse sine in radians
[edit | edit source]asind
Inverse sine in degrees
[edit | edit source]sinh
Hyperbolic sine of argument in radians
[edit | edit source]asinh
Inverse hyperbolic sine
[edit | edit source]cos
Cosine of argument in radians
[edit | edit source]cosd
Cosine of argument in degrees
[edit | edit source]acos
Inverse cosine in radians
[edit | edit source]acosd
Inverse cosine in degrees
[edit | edit source]cosh
Hyperbolic cosine
[edit | edit source]acosh
Inverse hyperbolic cosine
[edit | edit source]tan
Tangent of argument in radians
[edit | edit source]tand
Tangent of argument in degrees
[edit | edit source]atan
Inverse tangent in radians
[edit | edit source]atand
Inverse tangent in degrees
[edit | edit source]atan2
Four-quadrant inverse tangent
[edit | edit source]atan2d
Four-quadrant inverse tangent in degrees
[edit | edit source]tanh
Hyperbolic tangent
[edit | edit source]atanh
Inverse hyperbolic tangent
[edit | edit source]csc
Cosecant of input angle in radians
[edit | edit source]cscd
Cosecant of argument in degrees
[edit | edit source]acsc
Inverse cosecant in radians
[edit | edit source]acscd
Inverse cosecant in degrees
[edit | edit source]csch
Hyperbolic cosecant
[edit | edit source]acsch
Inverse hyperbolic cosecant
[edit | edit source]sec
Secant of angle in radians
[edit | edit source]secd
Secant of argument in degrees
[edit | edit source]asec
Inverse secant in radians
[edit | edit source]asecd
Inverse secant in degrees
[edit | edit source]sech
Hyperbolic secant
[edit | edit source]asech
Inverse hyperbolic secant
[edit | edit source]cot
Cotangent of angle in radians
[edit | edit source]cotd
Cotangent of argument in degrees
[edit | edit source]acot
Inverse cotangent in radians
[edit | edit source]acotd
Inverse cotangent in degrees
[edit | edit source]coth
Hyperbolic cotangent
[edit | edit source]acoth
Inverse hyperbolic cotangent
[edit | edit source]hypot
Square root of sum of squares (hypotenuse)
[edit | edit source]deg2rad
Convert angle from degrees to radians
[edit | edit source]rad2deg
Convert angle from radians to degrees
[edit | edit source]Exponents and Logarithms
[edit | edit source]See Powers, logs and roots in the Julia manual.
exp
Exponential
[edit | edit source]expm1
Compute accurately for small values of x
[edit | edit source]log
Natural logarithm
[edit | edit source]log10
Common logarithm (base 10)
[edit | edit source]log1p
Compute log(1+x) accurately for small values of x
[edit | edit source]log2
Base 2 logarithm and floating-point number dissection
[edit | edit source]nextpow2
Exponent of next higher power of 2
[edit | edit source]nthroot
Real nth root of real numbers
[edit | edit source]pow2
Base 2 power and scale floating-point numbers
[edit | edit source]reallog
Natural logarithm for nonnegative real arrays
[edit | edit source]realpow
Array power for real-only output
[edit | edit source]realsqrt
Square root for nonnegative real arrays
[edit | edit source]sqrt
Square root
[edit | edit source]Complex Numbers
[edit | edit source]See Complex Numbers in the Julia manual.
abs
Absolute value and complex magnitude
[edit | edit source]angle
Phase angle
[edit | edit source]complex
Create complex array
[edit | edit source]conj
Complex conjugate
[edit | edit source]cplxpair
Sort complex numbers into complex conjugate pairs
[edit | edit source]i
Imaginary unit
[edit | edit source]imag
Imaginary part of complex number
[edit | edit source]isreal
Determine whether array is real
[edit | edit source]j
Imaginary unit
[edit | edit source]real
Real part of complex number
[edit | edit source]sign
Sign function (signum function)
[edit | edit source]unwrap
Correct phase angles to produce smoother phase plots
[edit | edit source]Discrete Math
[edit | edit source]Equivalents available in Julia Base
[edit | edit source]factorial
Factorial of input
[edit | edit source]gcd
Greatest common divisor
[edit | edit source]lcm
Least common multiple
[edit | edit source]Equivalents available in JuliaMath/Primes.jl
[edit | edit source]factor
Prime factors
[edit | edit source]primes
Prime numbers less than or equal to input value
[edit | edit source]isprime
Determine which array elements are prime
[edit | edit source]nchoosek
Binomial coefficient or all combinations (Julia: binomial
)
[edit | edit source]Others
[edit | edit source]perms
All possible permutations
[edit | edit source]
The Julia Permutations.permutations(a)
function ( Permutations.jl package) returns an iterator object (because the number of permutations can be very large), and in lexicographic order rather than reverse lexicographic. Therefore a drop-in equivalent could be constructed as follows:
julia> perms(a) = reverse(collect(permutations(a))) perms (generic function with 1 method) julia> perms([2,4,6]) 6-element Array{Array{Int64,1},1}: [6, 4, 2] [6, 2, 4] [4, 6, 2] [4, 2, 6] [2, 6, 4] [2, 4, 6]
rat
Rational fraction approximation, rats
Rational output
[edit | edit source]There doesn't appear to be a direct Julia equivalent of these, but note that unlike Matlab, Julia has a native Rational Number type .
Polynomials
[edit | edit source]See the Polynomials.jl package. Note that this package provides a proper type for polynomials, Polynomials.Poly
, while in Matlab a polynomial of degree is represented by a vector of length whose elements are the coefficients in descending powers of the polynomial.
poly
Polynomial with specified roots or characteristic polynomial
[edit | edit source]polyeig
Polynomial eigenvalue problem
[edit | edit source]polyfit
Polynomial curve fitting
[edit | edit source]Polynomials.polyfit
provides comparable basic functionality--the single output argument form of the Matlab function--although it lacks the additional error estimate and centering/scaling features.
residue
Partial fraction expansion (partial fraction decomposition)
[edit | edit source]roots
Polynomial roots
[edit | edit source]Polynomials.roots
provides roots with multiplicity.
polyval
Polynomial evaluation
[edit | edit source]See Base.Math.@evalpoly
in the Julia Manual.
polyvalm
Matrix polynomial evaluation
[edit | edit source]conv
Convolution and polynomial multiplication
[edit | edit source]deconv
Deconvolution and polynomial division
[edit | edit source]polyint
Polynomial integration
[edit | edit source]polyder
Polynomial differentiation
[edit | edit source]Special Functions
[edit | edit source]airy
Airy Functions
[edit | edit source]besselh
Bessel function of third kind (Hankel function)
[edit | edit source]besseli
Modified Bessel function of first kind
[edit | edit source]besselj
Bessel function of first kind
[edit | edit source]besselk
Modified Bessel function of second kind
[edit | edit source]bessely
Bessel function of second kind
[edit | edit source]beta
Beta function
[edit | edit source]betainc
Incomplete beta function
[edit | edit source]betaincinv
Beta inverse cumulative distribution function
[edit | edit source]betaln
Logarithm of beta function
[edit | edit source]ellipj
Jacobi elliptic functions
[edit | edit source]ellipke
Complete elliptic integrals of first and second kind
[edit | edit source]erf
Error function
[edit | edit source]erfc
Complementary error function
[edit | edit source]erfcinv
Inverse complementary error function
[edit | edit source]erfcx
Scaled complementary error function
[edit | edit source]erfinv
Inverse error function
[edit | edit source]expint
Exponential integral
[edit | edit source]gamma
Gamma function
[edit | edit source]gammainc
Incomplete gamma function
[edit | edit source]gammaincinv
Inverse incomplete gamma function
[edit | edit source]gammaln
Logarithm of gamma function
[edit | edit source]legendre
Associated Legendre functions
[edit | edit source]psi
Psi (polygamma) function
[edit | edit source]Cartesian Coordinate System Conversion
[edit | edit source]cart2pol
Transform Cartesian coordinates to polar or cylindrical
[edit | edit source]cart2sph
Transform Cartesian coordinates to spherical
[edit | edit source]pol2cart
Transform polar or cylindrical coordinates to Cartesian
[edit | edit source]sph2cart
Transform spherical coordinates to Cartesian
[edit | edit source]Constants and Test Matrices
[edit | edit source]Constants
[edit | edit source]See General Number Functions and Constants in the Julia manual.
eps
Floating-point relative accuracy
[edit | edit source]flintmax
Largest consecutive integer in floating-point format
[edit | edit source]i
, j
Imaginary unit
[edit | edit source]In Julia, im
is equivalent; this allows i
and j
to be used as e.g. loop indices without conflict.
Inf
Infinity
[edit | edit source]pi
Ratio of circle's circumference to its diameter
[edit | edit source]Also available as pi
in Julia as well as \pi
Tab ↹ →
NaN
Not-a-Number
[edit | edit source]isfinite
Array elements that are finite
[edit | edit source]isinf
Array elements that are infinite
[edit | edit source]isnan
Array elements that are NaN
[edit | edit source]compan
Companion matrix
[edit | edit source]Test Matrices
[edit | edit source]See the MatrixDepot.jl package; most of the matrices in gallery
and all the rest below are available in that package, plus some additional ones.
gallery
Test matrices
[edit | edit source]hadamard
Hadamard matrix
[edit | edit source]hankel
Hankel matrix
[edit | edit source]hilb
Hilbert matrix
[edit | edit source]invhilb
Inverse of Hilbert matrix
[edit | edit source]magic
Magic square
[edit | edit source]pascal
Pascal matrix
[edit | edit source]rosser
Classic symmetric eigenvalue test problem
[edit | edit source]toeplitz
Toeplitz matrix
[edit | edit source]vander
Vandermonde matrix
[edit | edit source]wilkinson
Wilkinson's eigenvalue test matrix
[edit | edit source]Linear Algebra
[edit | edit source]See Linear Algebra in the Julia manual.
mldivide
Solve systems of linear equations for
[edit | edit source]mrdivide
Solve systems of linear equations for
[edit | edit source]decomposition
Matrix decomposition for solving linear systems
[edit | edit source]lsqminnorm
Minimum norm least-squares solution to linear equation
[edit | edit source]linsolve
Solve linear system of equations
[edit | edit source]inv
Matrix inverse
[edit | edit source]pinv
Moore-Penrose pseudoinverse
[edit | edit source]lscov
Least-squares solution in presence of known covariance
[edit | edit source]lsqnonneg
Solve nonnegative linear least-squares problem
[edit | edit source]sylvester
Solve Sylvester equation for
[edit | edit source]eig
Eigenvalues and eigenvectors
[edit | edit source]eigs
Subset of eigenvalues and eigenvectors
[edit | edit source]balance
Diagonal scaling to improve eigenvalue accuracy
[edit | edit source]svd
Singular value decomposition
[edit | edit source]svds
Subset of singular values and vectors
[edit | edit source]gsvd
Generalized singular value decomposition
[edit | edit source]ordeig
Eigenvalues of quasitriangular matrices
[edit | edit source]ordqz
Reorder eigenvalues in QZ factorization
[edit | edit source]ordschur
Reorder eigenvalues in Schur factorization
[edit | edit source]polyeig
Polynomial eigenvalue problem
[edit | edit source]qz
QZ factorization for generalized eigenvalues
[edit | edit source]hess
Hessenberg form of matrix
[edit | edit source]schur
Schur decomposition
[edit | edit source]rsf2csf
Convert real Schur form to complex Schur form
[edit | edit source]cdf2rdf
Convert complex diagonal form to real block diagonal form
[edit | edit source]lu
LU matrix factorization
[edit | edit source]ldl
Block LDL' factorization for Hermitian indefinite matrices
[edit | edit source]chol
Cholesky factorization
[edit | edit source]cholupdate
Rank 1 update to Cholesky factorization
[edit | edit source]qr
Orthogonal-triangular decomposition
[edit | edit source]qrdelete
Remove column or row from QR factorization
[edit | edit source]qrinsert
Insert column or row into QR factorization
[edit | edit source]qrupdate
Rank 1 update to QR factorization
[edit | edit source]planerot
Givens plane rotation
[edit | edit source]transpose
Transpose vector or matrix
[edit | edit source]ctranspose
Complex conjugate transpose
[edit | edit source]mtimes
Matrix Multiplication
[edit | edit source]mpower
Matrix power
[edit | edit source]sqrtm
Matrix square root
[edit | edit source]expm
Matrix exponential
[edit | edit source]logm
Matrix logarithm
[edit | edit source]funm
Evaluate general matrix function
[edit | edit source]kron
Kronecker tensor product
[edit | edit source]cross
Cross product
[edit | edit source]dot
Dot product
[edit | edit source]bandwidth
Lower and upper matrix bandwidth
[edit | edit source]tril
Lower triangular part of matrix
[edit | edit source]triu
Upper triangular part of matrix
[edit | edit source]isbanded
Determine if matrix is within specific bandwidth
[edit | edit source]isdiag
Determine if matrix is diagonal
[edit | edit source]ishermitian
Determine if matrix is Hermitian or skew-Hermitian
[edit | edit source]issymmetric
Determine if matrix is symmetric or skew-symmetric
[edit | edit source]istril
Determine if matrix is lower triangular
[edit | edit source]istriu
Determine if matrix is upper triangular
[edit | edit source]norm
Vector and matrix norms
[edit | edit source]normest
2-norm estimate
[edit | edit source]vecnorm
Vector-wise norm
[edit | edit source]cond
Condition number for inversion
[edit | edit source]condest
1-norm condition number estimate
[edit | edit source]rcond
Reciprocal condition number
[edit | edit source]condeig
Condition number with respect to eigenvalues
[edit | edit source]det
Matrix determinant
[edit | edit source]null
Null space
[edit | edit source]orth
Orthonormal basis for range of matrix
[edit | edit source]rank
Rank of matrix
[edit | edit source]rref
Reduced row echelon form (Gauss-Jordan elimination)
[edit | edit source]trace
Sum of diagonal elements
[edit | edit source]subspace
Angle between two subspaces
[edit | edit source]Random Number Generation
[edit | edit source]rand
Uniformly distributed random numbers
[edit | edit source]randn
Normally distributed random numbers
[edit | edit source]randi
Uniformly distributed pseudorandom integers
[edit | edit source]randperm
Random permutation
[edit | edit source]rng
Control random number generation
[edit | edit source]randStream
Random number stream
[edit | edit source]Interpolation
[edit | edit source]interp1
1-D data interpolation (table lookup)
[edit | edit source]interp2
Interpolation for 2-D gridded data in meshgrid format
[edit | edit source]interp3
Interpolation for 3-D gridded data in meshgrid format
[edit | edit source]interpn
Interpolation for 1-D, 2-D, 3-D, and N-D gridded data in ndgrid format
[edit | edit source]gRiddedinterpolant
Gridded data interpolation
[edit | edit source]pchip
Piecewise Cubic Hermite Interpolating Polynomial (PCHIP)
[edit | edit source]spline
Cubic spline data interpolation
[edit | edit source]ppval
Evaluate piecewise polynomial
[edit | edit source]mkpp
Make piecewise polynomial
[edit | edit source]unmkpp
Extract piecewise polynomial details
[edit | edit source]padecoef
Padé approximation of time delays
[edit | edit source]interpft
1-D interpolation (FFT method)
[edit | edit source]ndgrid
Rectangular grid in N-D space
[edit | edit source]meshgrid
2-D and 3-D grids
[edit | edit source]griddata
Interpolate 2-D or 3-D scattered data
[edit | edit source]griddatan
Interpolate N-D scattered data
[edit | edit source]scaTteredinterpolant
Interpolate 2-D or 3-D scattered data
[edit | edit source]Optimization
[edit | edit source]fminbnd
Find minimum of single-variable function on fixed interval
[edit | edit source]fminsearch
Find minimum of unconstrained multivariable function using derivative-free method
[edit | edit source]lsqnonneg
Solve nonnegative linear least-squares problem
[edit | edit source]fzero
Root of nonlinear function
[edit | edit source]optimget
Optimization options values
[edit | edit source]optimset
Create or edit optimization options structure
[edit | edit source]Numerical Integration and Differential Equations
[edit | edit source]See DifferentialEquations.jl. In particular see the section Translations from MATLAB/Python/R.
Ordinary Differential Equations
[edit | edit source]ode45
Solve nonstiff differential equations — medium order method
[edit | edit source]ode23
Solve nonstiff differential equations — low order method
[edit | edit source]ode113
Solve nonstiff differential equations — variable order method
[edit | edit source]ode15s
Solve stiff differential equations and DAEs — variable order method
[edit | edit source]ode23s
Solve stiff differential equations — low order method
[edit | edit source]ode23t
Solve moderately stiff ODEs and DAEs — trapezoidal rule
[edit | edit source]ode23tb
Solve stiff differential equations — trapezoidal rule + backward differentiation formula
[edit | edit source]ode15i
Solve fully implicit differential equations — variable order method
[edit | edit source]decic
Compute consistent initial conditions for ode15i
[edit | edit source]odeget
Extract ODE option values
[edit | edit source]odeset
Create or modify options structure for ODE solvers
[edit | edit source]deval
Evaluate differential equation solution structure
[edit | edit source]odextend
Extend solution to ODE
[edit | edit source]Boundary Value Problems
[edit | edit source]bvp4c
Solve boundary value problems for ordinary differential equations
[edit | edit source]bvp5c
Solve boundary value problems for ordinary differential equations
[edit | edit source]bvpinit
Form initial guess for BVP solvers
[edit | edit source]bvpxtend
Form guess structure for extending boundary value solutions
[edit | edit source]bvpget
Extract properties from options structure created with bvpset
[edit | edit source]bvpset
Create or alter options structure of boundary value problem
[edit | edit source]deval
Evaluate differential equation solution structure
[edit | edit source]Delay Differential Equations
[edit | edit source]dde23
Solve delay differential equations (DDEs) with constant delays
[edit | edit source]ddesd
Solve delay differential equations (DDEs) with general delays
[edit | edit source]ddensd
Solve delay differential equations (DDEs) of neutral type
[edit | edit source]ddeget
Extract properties from delay differential equations options structure
[edit | edit source]ddeset
Create or alter delay differential equations options structure
[edit | edit source]deval
Evaluate differential equation solution structure
[edit | edit source]Partial Differential Equations
[edit | edit source]pdepe
Solve initial-boundary value problems for parabolic-elliptic PDEs in 1-D
[edit | edit source]pdeval
Evaluate numerical solution of PDE using output of pdepe
[edit | edit source]Numerical Integration and Differentiation
[edit | edit source]integral
Numerical integration
[edit | edit source]integral2
Numerically evaluate double integral
[edit | edit source]integral3
Numerically evaluate triple integral
[edit | edit source]quadgk
Numerically evaluate integral, adaptive Gauss-Kronrod quadrature
[edit | edit source]quad2d
Numerically evaluate double integral, tiled method
[edit | edit source]cumtrapz
Cumulative trapezoidal numerical integration
[edit | edit source]trapz
Trapezoidal numerical integration
[edit | edit source]polyint
Polynomial integration
[edit | edit source]del2
Discrete Laplacian
[edit | edit source]diff
Differences and Approximate Derivatives
[edit | edit source]gradient
Numerical gradient
[edit | edit source]polyder
Polynomial differentiation
[edit | edit source]Fourier Analysis and Filtering
[edit | edit source]fft
Fast Fourier transform
[edit | edit source]fft2
2-D fast Fourier transform
[edit | edit source]fftn
N-D fast Fourier transform
[edit | edit source]fftshift
Shift zero-frequency component to center of spectrum
[edit | edit source]fftw
Define method for determining FFT algorithm
[edit | edit source]ifft
Inverse fast Fourier transform
[edit | edit source]ifft2
2-D inverse fast Fourier transform
[edit | edit source]ifftn
Multidimensional inverse fast Fourier transform
[edit | edit source]ifftshift
Inverse zero-frequency shift
[edit | edit source]nextpow2
Exponent of next higher power of 2
[edit | edit source]interpft
1-D interpolation (FFT method)
[edit | edit source]conv
Convolution and polynomial multiplication
[edit | edit source]conv2
2-D convolution
[edit | edit source]convn
N-D convolution
[edit | edit source]deconv
Deconvolution and polynomial division
[edit | edit source]filter
1-D digital filter
[edit | edit source]filter2
2-D digital filter
[edit | edit source]ss2tf
Convert state-space representation to transfer function
[edit | edit source]padecoef
Padé approximation of time delays
[edit | edit source]Sparse Matrices
[edit | edit source]spalloc
Allocate space for sparse matrix
[edit | edit source]spdiags
Extract and create sparse band and diagonal matrices
[edit | edit source]speye
Sparse identity matrix
[edit | edit source]sprand
Sparse uniformly distributed random matrix
[edit | edit source]sprandn
Sparse normally distributed random matrix
[edit | edit source]sprandsym
Sparse symmetric random matrix
[edit | edit source]sparse
Create sparse matrix
[edit | edit source]spconvert
Import from sparse matrix external format
[edit | edit source]issparse
Determine whether input is sparse
[edit | edit source]nnz
Number of nonzero matrix elements
[edit | edit source]nonzeros
Nonzero matrix elements
[edit | edit source]nzmax
Amount of storage allocated for nonzero matrix elements
[edit | edit source]spfun
Apply function to nonzero sparse matrix elements
[edit | edit source]spones
Replace nonzero sparse matrix elements with ones
[edit | edit source]spparms
Set parameters for sparse matrix routines
[edit | edit source]spy
Visualize sparsity pattern
[edit | edit source]find
Find indices and values of nonzero elements
[edit | edit source]full
Convert sparse matrix to full matrix
[edit | edit source]dissect
Nested dissection permutation
[edit | edit source]amd
Approximate minimum degree permutation
[edit | edit source]colamd
Column approximate minimum degree permutation
[edit | edit source]colperm
Sparse column permutation based on nonzero count
[edit | edit source]dmperm
Dulmage-Mendelsohn decomposition
[edit | edit source]randperm
Random permutation
[edit | edit source]symamd
Symmetric approximate minimum degree permutation
[edit | edit source]symrcm
Sparse reverse Cuthill-McKee ordering
[edit | edit source]pcg
Preconditioned conjugate gradients method
[edit | edit source]minres
Minimum residual method
[edit | edit source]symmlq
Symmetric LQ method
[edit | edit source]gmres
Generalized minimum residual method (with restarts)
[edit | edit source]bicg
Biconjugate gradients method
[edit | edit source]bicgstab
Biconjugate gradients stabilized method
[edit | edit source]bicgstabl
Biconjugate gradients stabilized (l) method
[edit | edit source]cgs
Conjugate gradients squared method
[edit | edit source]qmr
Quasi-minimal residual method
[edit | edit source]tfqmr
Transpose-free quasi-minimal residual method
[edit | edit source]lsqr
LSQR method
[edit | edit source]ichol
Incomplete Cholesky factorization
[edit | edit source]ilu
Incomplete LU factorization
[edit | edit source]eigs
Subset of eigenvalues and eigenvectors
[edit | edit source]svds
Subset of singular values and vectors
[edit | edit source]normest
2-norm estimate
[edit | edit source]condest
1-norm condition number estimate
[edit | edit source]sprank
Structural rank
[edit | edit source]etree
Elimination tree
[edit | edit source]symbfact
Symbolic factorization analysis
[edit | edit source]spaugment
Form least-squares augmented system
[edit | edit source]dmperm
Dulmage-Mendelsohn decomposition
[edit | edit source]etreeplot
Plot elimination tree
[edit | edit source]treelayout
Lay out tree or forest
[edit | edit source]treeplot
Plot picture of tree
[edit | edit source]gplot
Plot nodes and links representing adjacency matrix
[edit | edit source]unmesh
Convert edge matrix to coordinate and Laplacian matrices
[edit | edit source]Graph and Network Algorithms
[edit | edit source]graph
Graph with undirected edges
[edit | edit source]digraph
Graph with directed edges
[edit | edit source]addnode
Add new node to graph
[edit | edit source]rmnode
Remove node from graph
[edit | edit source]addedge
Add new edge to graph
[edit | edit source]rmedge
Remove edge from graph
[edit | edit source]flipedge
Reverse edge directions
[edit | edit source]numnodes
Number of nodes in graph
[edit | edit source]numedges
Number of edges in graph
[edit | edit source]findnode
Locate node in graph
[edit | edit source]findedge
Locate edge in graph
[edit | edit source]edgecount
Number of edges between two nodes
[edit | edit source]reordernodes
Reorder graph nodes
[edit | edit source]subgraph
Extract subgraph
[edit | edit source]bfsearch
Breadth-first graph search
[edit | edit source]dfsearch
Depth-first graph search
[edit | edit source]centrality
Measure node importance
[edit | edit source]maxflow
Maximum flow in graph
[edit | edit source]conncomp
Connected graph components
[edit | edit source]biconncomp
Biconnected graph components
[edit | edit source]condensation
Graph condensation
[edit | edit source]bctree
Block-cut tree graph
[edit | edit source]minspantree
Minimum spanning tree of graph
[edit | edit source]toposort
Topological order of directed acyclic graph
[edit | edit source]isdag
Determine if graph is acyclic
[edit | edit source]transclosure
Transitive closure
[edit | edit source]transreduction
Transitive reduction
[edit | edit source]isisomorphic
Determine whether two graphs are isomorphic
[edit | edit source]isomorphism
Compute isomorphism between two graphs
[edit | edit source]ismultigraph
Determine whether graph has multiple edges
[edit | edit source]simplify
Reduce multigraph to simple graph
[edit | edit source]shortestpath
Shortest path between two single nodes
[edit | edit source]shortestpathtree
Shortest path tree from node
[edit | edit source]distances
Shortest path distances of all node pairs
[edit | edit source]adjacency
Graph adjacency matrix
[edit | edit source]incidence
Graph incidence matrix
[edit | edit source]laplacian
Graph Laplacian matrix
[edit | edit source]degree
Degree of graph nodes
[edit | edit source]neighbors
Neighbors of graph node
[edit | edit source]nearest
Nearest neighbors within radius
[edit | edit source]indegree
In-degree of nodes
[edit | edit source]outdegree
Out-degree of nodes
[edit | edit source]predecessors
Node predecessors
[edit | edit source]successors
Node successors
[edit | edit source]inedges
Incoming edges to node
[edit | edit source]outedges
Outgoing edges from node
[edit | edit source]plot
Plot graph nodes and edges
[edit | edit source]labeledge
Label graph edges
[edit | edit source]labelnode
Label graph nodes
[edit | edit source]layout
Change layout of graph plot
[edit | edit source]highlight
Highlight nodes and edges in plotted graph
[edit | edit source]graphPlot
Graph plot for directed and undirected graphs
[edit | edit source]Computational Geometry
[edit | edit source]See the JuliaGeometry GitHub organization.
Triangulation Representation
[edit | edit source]triangulation
Triangulation in 2-D or 3-D
[edit | edit source]tetramesh
Tetrahedron mesh plot
[edit | edit source]trimesh
Triangular mesh plot
[edit | edit source]triplot
2-D triangular plot
[edit | edit source]trisurf
Triangular surface plot
[edit | edit source]Delaunay Triangulation
[edit | edit source]deLaunaytriangulation
Delaunay triangulation in 2-D and 3-D
[edit | edit source]delaunay
Delaunay triangulation
[edit | edit source]delaunayn
N-D Delaunay triangulation
[edit | edit source]tetramesh
Tetrahedron mesh plot
[edit | edit source]trimesh
Triangular mesh plot
[edit | edit source]triplot
2-D triangular plot
[edit | edit source]trisurf
Triangular surface plot
[edit | edit source]Spatial Search
[edit | edit source]triangulation
Triangulation in 2-D or 3-D
[edit | edit source]deLaunaytriangulation
Delaunay triangulation in 2-D and 3-D
[edit | edit source]dsearchn
N-D nearest point search
[edit | edit source]tsearchn
N-D closest simplex search
[edit | edit source]delaunay
Delaunay triangulation
[edit | edit source]delaunayn
N-D Delaunay triangulation
[edit | edit source]Bounding Regions
[edit | edit source]boundary
Boundary of a set of points in 2-D or 3-D
[edit | edit source]alphaShape
Polygons and polyhedra from points in 2-D and 3-D
[edit | edit source]convhull
Convex hull
[edit | edit source]convhulln
N-D convex hull
[edit | edit source]Voronoi Diagram
[edit | edit source]patch
Create one or more filled polygons
[edit | edit source]voronoi
Voronoi diagram
[edit | edit source]voronoin
N-D Voronoi diagram
[edit | edit source]Elementary Polygons
[edit | edit source]The Julia package GeometricalPredicates.jl provides some similar functionality.