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 Data Analysis and Statistics combination() Combination corrcoef() Correlation coefficient correlation2() Two-dimensional Correlation covariance() Covariance cumprod() Cumulative product calculation cumsum() Cumulative sum calculation factorial() Factorial mean(), cmean() Mean value calculation median() Median value calculation product(), cproduct() Product of all elements sort() Sorting elements sum(), csum() Sum of all elements std() Standard deviation Data Interpolation and Curve Fitting curvefit() Fit a set of data points to a combination of specified functions interp1() One-dimensional interpolation interp2() Two-dimensional interpolation polyfit() Fit a set of data points to a polynomial function Minimization or Maximization of Functions fminimum(), fminimums() Find the minimum value of a function Polynomials charpolycoef() Characteristic polynomial of a matrix companionmatrix() Companion matrix polycoef() Find polynomial coefficients based on its roots polyder(), polyder2() Polynomial derivative or derivative of product or quotient of two polynomials polyeval(), cpolyeval(), polyevalarray() Polynomial and its Derivative Evaluation polyevalm() Matrix polynomial function evaluation polyfit() Fit a set of data points to a polynomial function roots() Roots of a polynomial Nonlinear Equations fsolve() Find zeros of a nonlinear system of equations fzero() Find a zero position of a nonlinear function Ordinary Differential Equations odesolve() Ordinary Differential Equations Derivatives and Differences derivative(), derivatives() Derivative difference() Differences of adjacent elements of vector Integration integral1() Integration integral2() 2D Integration integration2() 2D Integration integral3() 3D Integration integration3() 3D Integration Matrix Analysis Functions expm() Matrix exponential cfunm(), funm() Matrix function evaluation logm() Matrix natural logarithm polyevalm() Matrix polynomial function evaluation sqrtm() Matrix square root Matrix Decomposition choldecomp() Cholesky Decomposition hessdecomp() Hessenberg Decomposition ludecomp() LU factorization qrdecomp() Orthogonal-triangular QR Decomposition schurdecomp() Schur decomposition svd() Singular value decomposition Matrix Functions companionmatrix() Companion matrix condnum() Condition number of a matrix cdeterminant(), determinant() Determinant of a matrix cdiagonal(), diagonal() Get a vector with diagonals of a matrix cdiagonalmatrix(),diagonalmatrix() Create a diagonal matrix fliplr() Flip matrix in left/right direction flipud() Flip matrix in up/down direction identitymatrix() Identity matrix inverse(), cinverse() Inverse of a square matrix norm() Norm of a vector or matrix nullspace() Null space of a matrix orthonormalbase() Orthonormal bases of a matrix inverse(), cinverse() Inverse of a square matrix pinverse() Pseudoinverse a matrix companionmatrix() Companion matrix rank() Rank of a matrix rcondnum() Reciprocal condition number of a matrix rot90() Rotate matrix 90 degrees trace(), ctrace() Sum of diagonal elements of a matrix triangularmatrix(), ctriangularmatrix() Triangular matrix Special Matrices specialmatrix() Special matrix Linear Equations inverse(), cinverse() Inverse of a square matrix pinverse() Pseudoinverse a matrix linsolve() Solve the linear equations by LU factorization llsqcovsolve() Solve the linear equations by linear squares with known covariance llsqnonnegsolve() Solve the linear equations with non-negative values by linear squares method llsqsolve() Linear Least square solution for linear equations Eigenvalues and Eigenvectors eigensystem() Eigenvalues and Eigenvectors Fast Fourier Transforms fft() Fast Fourier Transform ifft() Inverse Fast Fourier Transform Convolution and Filtering conv() Convolution conv2() Two-dimensional convolution deconv() Deconvolution filter() Filter filter2() Two-dimensional Filter Cross Correlation xcorr() Cross correlation Special Mathematical Functions cross() Cross product dot() Dot product gcd() Greatest common divisor lcm() Least common multiple Complex Functions complexsolve() Solve a complex equation residue() Residue and factorization Array Functions fevalarray(), cfevalarray() Function evaluation