var Variance poly Polynomial with specified roots Function Functions-Nonlinear Numerical polyder Polynomial derivative Methods Finite Differences polyeig Polynomial eigenvalue problem bvpde polyfit Polynomial curve fitting del2 Discrete Laplacian polyint Analytic polynomial integration Extract parameters from BVP options structure diff Differences and approximate derivatives polyval Polynomial evaluation bvpinit Form the initial guess for gradient Numerical gradient polyvlm Matrix polynomial evaluation bvpset Createfalter BVP options structur bvpval Evaluate the solution computed by bvp4c residue Correlation dblquad roots Polynomial roots fminbad Minimize a function of one variable correoef Correlation coefficients fminsearch Minimizea function of several variables Covariance matrix Data Interpolation Find zero of a function of one variable ode45.ode23. Filtering and Convolution convhull Convex hull Solve initial value problems for ODEs ou Multidimensional convex hull conv Convolution and polynomial multiplication delaunay Delaunay triangulation conv2 Two-dimensional conolution odeget Extract parameters from ODE options structure delaunay3 Three-dimensionalDelaunay tessellation deconv Deconvolution and polynomial division odeset Create/alter ODE options structure delaunay Multidimensional Delaunay tessellation Get optimization options structure parameter filter ()ne dsearch Search for nearest point optimget Two-dimensional digita filtering dsearchn Multidimensional closest point search griddata Data gridding optimset pdepe Solve initial-boundary value problems Fourier Transforms griddata3 pdeval Evaluate the solution computed by pdepe abs Absolute value and complex magnitude griddatan Data gridding and hypersurface fitting (dimension>2) quad Numerical evaluation of integrals,adaptive Simpson quadrature angle Phase angle interpl One-dimensional data interpolation(table lookup) eplxpair Sort complex numbers into complex conjugate pairs interp2 Two-dimensional data interpolation(table lookup) One-dimensional fast Fourier transform interp3 Thre-dimensional data interpolation (table lookup) veetorize Vectorize expression Two-dimersional fast Fourier transform One-dimensional interpolation using the FFTmethod ffshift Shif DCcomponent of fast Fourier transform of ioterpn Multidimensional data interpolation(table lookup) Sparse Matrix Functions meshgrid GencrateX and Ymatrices for three-dimensional plots Elementary Sparse Matrices Inverse one-dimensional fast Fourier transform Generate arrays for multidimensional functions and ndgrid intemolation iff2 Inverse two-dimensional fast Fourier transform spdiags Extract and create sparse band and diagonal matrices Inverse multidimensional fast Fourier transform HIP) speve Sparse identity matrix ifftshift Inverse FFT shift Ppval Piecewise polynomial evaluation sprand Sparse uniformly distributed random matrix nextpow2 Next power oftwo spline Cubie spline data interpolation sprandn Sparse normally distributed random matrix unwrap Correct phase angles Search for enclosing Delaunay triangle sprandsym Sparse symmetric random matrix tsearchn Multidimensional closest simplex search Polynomial and Interpolation Functions voronoi Voronoi diagram oronoin Multidimensional Voronoi diagrams Full to Sparse Conversion Polynomials find Find indices and values ofnonzeroelements Convolution and polynomial multiplication full deconv Deconvolution and polynomial division sparse Create sparse matrix var Variance Finite Differences del2 Discrete Laplacian diff Differences and approximate derivatives gradient Numerical gradient Correlation corrcoef Correlation coefficients cov Covariance matrix Filtering and Convolution conv Convolution and polynomial multiplication conv2 Two-dimensional convolution deconv Deconvolution and polynomial division filter Filter data with an infinite impulse response (IIR) or finite impulse response (FIR) filter filter2 Two-dimensional digital filtering Fourier Transforms abs Absolute value and complex magnitude angle Phase angle cplxpair Sort complex numbers into complex conjugate pairs fft One-dimensional fast Fourier transform fft2 Two-dimensional fast Fourier transform fftshift Shift DC component of fast Fourier transform to center of spectrum ifft Inverse one-dimensional fast Fourier transform ifft2 Inverse two-dimensional fast Fourier transform ifftn Inverse multidimensional fast Fourier transform ifftshift Inverse FFT shift nextpow2 Next power of two unwrap Correct phase angles Polynomial and Interpolation Functions Polynomials conv Convolution and polynomial multiplication deconv Deconvolution and polynomial division poly Polynomial with specified roots polyder Polynomial derivative polyeig Polynomial eigenvalue problem polyfit Polynomial curve fitting polyint Analytic polynomial integration polyval Polynomial evaluation polyvalm Matrix polynomial evaluat ion residue Convert between partial fraction expansion and polynomial coefficients roots Polynomial roots Data Interpolation convhull Convex hull convhulln Multidimensional convex hull delaunay Delaunay triangulation delaunay3 Three-dimensionalDelaunay tessellation delaunayn Multidimensional Delaunay tessellation dsearch Search for nearest point dsearchn Multidimensional closest point search griddata Data gridding griddata3 Data gridding and hypersurface fitting for three-dimensional data griddatan Data gridding and hypersurface fitting (dimension >= 2) interp1 One-dimensional data interpolation (table lookup) interp2 Two-dimensional data interpolation (table lookup) interp3 Three-dimensional data interpolation (table lookup) interpft One-dimensional interpolation using the FFT method interpn Multidimensional data interpolation (table lookup) meshgrid Generate X and Y matrices for three-dimensional plots ndgrid Generate arrays for multidimensional functions and interpolation pchip Piecewise Cubic Hermite Interpolating Polynomial (PCHIP) ppval Piecewise polynomial evaluation spline Cubic spline data interpolation tsearch Search for enclosing Delaunay triangle tsearchn Multidimensional closest simplex search voronoi Voronoi diagram voronoin Multidimensional Voronoi diagrams Function Functions - Nonlinear Numerical Methods bvp4c Solve two-point boundry value problems (BVPs) for ordinary differential equations (ODEs) bvpget Extract parameters from BVP options structure bvpinit Form the initial guess for bvp4c bvpset Create/alter BVP options structure bvpval Evaluate the solution computed by bvp4c dblquad Numerical evaluation of double integrals fminbnd Minimize a function of one variable fminsearch Minimize a function of several variables fzero Find zero of a function of one variable ode45, ode23, ode113, ode15s, ode23s, ode23t, ode23tb Solve initial value problems for ODEs odeget Extract parameters from ODE options structure odeset Create/alter ODE options structure optimget Get optimization options structure parameter values optimset Create or edit optimization options parameter structure pdepe Solve initial-boundary value problems pdeval Evaluate the solution computed by pdepe quad Numerical evaluation of integrals, adaptive Simpson quadrature quadl Numerical evaluation of integrals, adaptive Lobatto quadrature vectorize Vectorize expression Sparse Matrix Functions Elementary Sparse Matrices spdiags Extract and create sparse band and diagonal matrices speye Sparse identity matrix sprand Sparse uniformly distributed random matrix sprandn Sparse normally distributed random matrix sprandsym Sparse symmetric random matrix Full to Sparse Conversion find Find indices and values of nonzero elements full Convert sparse matrix to full matrix sparse Create sparse matrix