C

FNLMath : Appendix A Alphabetical Summary of Routines : C

Function	Purpose Statement
CADD	Adds a scalar to each component of a vector, x ← x + a, all complex.
CAXPY	Computes the scalar times a vector plus a vector, y ← ax + y, all complex.
CCBCB	Copies a complex band matrix stored in complex band storage mode.
CCBCG	Converts a complex matrix in band storage mode to a complex matrix in full storage mode.
CCGCB	Converts a complex general matrix to a matrix in complex band storage mode.
CCGCG	Copies a complex general matrix.
CCONV	Computes the convolution of two complex vectors.
CCOPY	Copies a vector x to a vector y, both complex.
CCORL	Computes the correlation of two complex vectors.
CDGRD	Approximates the gradient using central differences.
CDOTC	Computes the complex conjugate dot product, .
CDOTU	Computes the complex dot product xTy.
CGBMV	Computes one of the matrix-vector operations: , where A is a matrix stored in band storage mode.
CGEMM	Computes one of the matrix-matrix operations:
CGEMV	Computes one of the matrix-vector operations:
CGERC	Computes the rank-one update of a complex general matrix: .
CGERU	Computes the rank-one update of a complex general matrix: .
CHBCB	Copies a complex Hermitian band matrix stored in band Hermitian storage mode to a complex band matrix stored in band storage mode.
CHBMV	Computes the matrix-vector operation , where A is an Hermitian band matrix in band Hermitian storage.
CHEMM	Computes one of the matrix-matrix operations: , where A is an Hermitian matrix and B and C are m by n matrices.
CHEMV	Computes the matrix-vector operation , where A is an Hermitian matrix.
CHER	Computes the rank-one update of an Hermitian matrix: with x complex and α real.
CHER2	Computes a rank-two update of an Hermitian matrix: .
CHER2K	Computes one of the Hermitian rank 2k operations: , where C is an n by n Hermitian matrix and A and B are n by k matrices in the first case and k by n matrices in the second case.
CHERK	Computes one of the Hermitian rank k operations: , where C is an n by n Hermitian matrix and A is an n by k matrix in the first case and a k by n matrix in the second case.
CHFCG	Extends a complex Hermitian matrix defined in its upper triangle to its lower triangle.
CHGRD	Checks a user-supplied gradient of a function.
CHHES	Checks a user-supplied Hessian of an analytic function.
CHJAC	Checks a user-supplied Hessian of an analytic function.
CHOL	Checks a user-supplied Jacobian of a system of equations with M functions in N unknowns.
CHPMV	Computes the matrix-vector operation y ← αAx + βy where A is an Hermitian matrix.
CHPR	Performs the matrix-vector operation: , where A is a triangular packed Hermitian.
COND	Computes the condition number of a matrix.
CONFT	Computes the least-squares constrained spline approximation, returning the B-spline coefficients.
CONST	Returns the value of various mathematical and physical constants.
CPSEC	Returns CPU time used in seconds.
CRBCB	Converts a real matrix in band storage mode to a complex matrix in band storage mode.
CRBRB	Copies a real band matrix stored in band storage mode.
CRBRG	Converts a real matrix in band storage mode to a real general matrix.
CRGCG	Copies a real general matrix to a complex general matrix.
CRGRB	Converts a real general matrix to a matrix in band storage mode.
CRGRG	Copies a real general matrix.
CRRCR	Copies a real rectangular matrix to a complex rectangular matrix.
CS1GD	Evaluates the derivative of a cubic spline on a grid.
CSAKM	Computes the Akima cubic spline interpolant.
CSBRB	Copies a real symmetric band matrix stored in band symmetric storage mode to a real band matrix stored in band storage mode.
CSCAL	Multiplies a vector by a scalar, y ← ay, both complex.
CSCON	Computes a cubic spline interpolant that is consistent with the concavity of the data.
CSDEC	Computes the cubic spline interpolant with specified derivative endpoint conditions.
CSDER	Evaluates the derivative of a cubic spline.
CSET	Sets the components of a vector to a scalar, all complex.
CSFRG	Extends a real symmetric matrix defined in its upper triangle to its lower triangle.
CSHER	Computes the Hermite cubic spline interpolant.
CSIEZ	Computes the cubic spline interpolant with the ‘not-a-knot’ condition and return values of the interpolant at specified points.
CSINT	Computes the cubic spline interpolant with the ‘not-a-knot’ condition.
CSITG	Evaluates the integral of a cubic spline.
CSPER	Computes the cubic spline interpolant with periodic boundary conditions.
CSROT	Applies a complex Givens plane rotation.
CSROTM	Applies a complex modified Givens plane rotation.
CSSCAL	Multiplies a complex vector by a single-precision scalar, y ← ay.
CSSCV	Computes a smooth cubic spline approximation to noisy data using cross-validation to estimate the smoothing parameter.
CSSED	Smooths one-dimensional data by error detection.
CSSMH	Computes a smooth cubic spline approximation to noisy data.
CSUB	Subtracts each component of a vector from a scalar, x ← a ‑ x, all complex.
CSVAL	Evaluates a cubic spline.
CSVCAL	Multiplies a complex vector by a single-precision scalar and store the result in another complex vector, y ← ax.
CSWAP	Interchanges vectors x and y, both complex.
CSYMM	Computes one of the matrix-matrix operations: , where A is a symmetric matrix and B and C are m by n matrices.
CSYR2K	Computes one of the symmetric rank 2k operations: , where C is an n by n symmetric matrix and A and B are n by k matrices in the first case and k by n matrices in the second case.
CSYRK	Computes one of the symmetric rank k operations: , where C is an n by n symmetric matrix and A is an n by k matrix in the first case and a k by n matrix in the second case.
CTBMV	Computes one of the matrix-vector operations: , where A is a triangular matrix in band storage mode.
CTBSV	Solves one of the complex triangular systems: , where A is a triangular matrix in band storage mode.
CTPSV	Solves one of the system of equations: where A is a packed upper or lower triangular matrix.
CTPMV	Performes the matrix-vector operation, , where A is a packed triangular matrix.
CTRMM	Computes one of the matrix-matrix operations: where B is an m by n matrix and A is a triangular matrix.
CTRMV	Computes one of the matrix-vector operations: , where A is a triangular matrix.
CTRSM	Solves one of the complex matrix equations: where A is a traiangular matrix
CTRSV	Solves one of the complex triangular systems: , where A is a triangular matrix.
CUNIT	Converts X in units XUNITS to Y in units YUNITS.
CVCAL	Multiplies a vector by a scalar and store the result in another vector, y ← ax, all complex.
CVTSI	Converts a character string containing an integer number into the corresponding integer form.
CZCDOT	Computes the sum of a complex scalar plus a complex conjugate dot product, , using a double-precision accumulator.
CZDOTA	Computes the sum of a complex scalar, a complex dot product and the double-complex accumulator, which is set to the result ACC ← ACC + a + xTy.
CZDOTC	Computes the complex conjugate dot product, , using a double-precision accumulator.
CZDOTI	Computes the sum of a complex scalar plus a complex dot product using a double-complex accumulator, which is set to the result ACC ← a + xTy.
CZDOTU	Computes the complex dot product xTy using a double-precision accumulator.
CZUDOT	Computes the sum of a complex scalar plus a complex dot product, a + xTy, using a double-precision accumulator.