Smoothing Cubic Splines with periodic conditions

Implements a model for Cubic Smoothing Splines with periodic boundary conditions

Smoothing cubic splines are implemented with periodic conditions, so that closed curves in any dimension can be approximated. It includes a test function to demonstrate it.Theoretical arguments

Periodical Cubic Interpolation

PERIODICAL PIECEWISE CUBIC HERMITE INTERPOLATING POLYNOMIAL: THE FUNCTIONS PERPCHIP AND PERSPLINE

The functions pchip and spline of matlab are adapted to the periodical case: perpchip and perspline. Some examples are given

Sines and Splines - Variable Projection

Separating periodic signals from their aperiodic background

"Sines and Splines - Variable Projection" demonstrates the separation of a signal into its periodic and aperiodic portions, whereby the period of the periodic portion is unknown. Therfore the signal

B-spline approximation

Computes the B-spline approximation from a set of coordinates. Supports periodicity and n-th order approximation.

Computes the B-spline approximation from a set of coordinates (knots).The number of points per interval (default: 10) and the order of the B-spline (default: 3) can be changed. Periodic boundaries

Free-knot spline approximation

Least squares approximation of 1D data using free-knots spline

The purpose of this function is to provide a flexible and robust fit to one-dimensional data using free-knot splines. The knots are free and able to cope with rapid change in the underlying model

SPLINEFIT

Fit a spline to noisy data

controlled by the selection of breaks. SPLINEFIT:- A curve fitting tool based on B-splines- Splines on ppform (piecewise polynomial)- Any spline order (cubic splines by default)- Periodic boundary conditions

CC2periodic

Find connected components of periodic binary data.

bwconncomp() determines connected components of a binary image, but the image may actually represent data on a periodic domain. In this case, CC2periodic() appropriately converts the output of

Cardinal Spline (Catmull-Rom) Spline

Evaluates and plot 2D Cardinal Spline (Catmull-Rom) Spline.

EvaluateCardinal2D.m--------------------Evaluates 2D Cardinal Spline at parameter value u.EvaluateCardinal2DAtNplusOneValues.m------------------------------------Evaluate cardinal spline for given

B-splines

Draw, manipulate and reconstruct B-splines.

The package comprises of a graphical utility to place uniform B-spline control points and see how the B-spline is redrawn as control points or control point weights are adjusted, and functions to

SLM - Shape Language Modeling

Least squares spline modeling using shape primitives

If you could only download one curve fitting tool to your laptop on a desert island, this should be it.For many years I have recommended that people use least squares splines for their curve fits

Thin plate splines

Matlab funcions for performing landmark warping using thin plate splines

B-spline Grid, Image and Point based Registration

B-spline registration of two 2D / 3D images or corrsp. points, affine and with smooth b-spline grid.

Affine and B-spline grid based registration and data-fitting of two 2D color/grayscale images or 3D volumes or point-data. Registration can be done intensity / pixel based, or landmark /

Periodic Table

Dialog for selecting elements from periodic table

The function creates a periodic table for user input. It can be used stand-alone or in a complementary fashion with the Mole Package by Gerhard Nieuwenhuiys.Features include highlighting certain

N Dimensional Cardinal Spline (Catmull-Rom) Spline Interpolation

N -Dimensional cubic Cardinal spline (Catmull-Rom) Interpolation

Cardinal(Catmull-Rom) Spline Interpolation for given four control points using uniform parameterization. Each control point can be N-Dimensional Euclidean space.----------------------------------A

Spline

Spline toolbox for the definition, evaluation and visualization of spline curves and surfaces based on standard B-splines

The Spline toolbox allows the definition, evaluation and visualization of spline curves and surfaces based on standard B-splines. Furthermore, it provides an approximation algorithm with the

Spline-gui

This GUI visualizes the basis functions of spline spaces

This GUI visualizes the basis functions of spline spaces. Different bases can be chosen from the following: 1) B-Splines 2) Cardinal Splines

Warping Using Thin Plate Splines

thin plate spline warping, inverse distance weighted interpolation

Demonstrates the use of thin plate splines based warping for temporal interpolation.

Spline derivative

Compute spline function and its derivative

Some set of tools that allows to interpolate on grid a spline function and compute its derivative.Multi-dimensional supported (but rather slow)Natural / Not-a-knot / periodic conditionsIt is still a

Cornu Spline

two-point spline with slope constraints

This function computes a two-point spline with end-point slope constraints as a section of a Cornu spiral. (The screenshot was generated with the demo code at the end of cornu_spline.m.) The

Restricted Cubic Spline

Fits the so called restricted cubic spline via least squares and obtains 95% bootstrap based CIs.

%Fits the so called restricted cubic spline via least squares (see Harrell %(2001)). The obtained spline is linear beyond the first and the last %knot. The truncated power basis representation is

Fast B-spline class

Fit, evaluate, differentiate non-uniform B-splines of any order - fast

fastBSpline - A fast, lightweight class that implements non-uniform B splines of any order Matlab's spline functions are very general. This generality comes at the price of speed. For large-scale

Spline and Piecewise Polynomial Tool

Create, manipulate, differentiate, and integrate splines

Extensive and flexible creation and manipulation of 1-D piecewise polynomials. Handles different spline end constraints. Finds derivatives and integrals, inverse interpolates, breaks apart, evaluates

A vectorized cubic spline

A vectorized, parallel capable, cubic spline interpolation/extrapolation function for non-uniformly distributed 1d data

The publication of this function was inspired by the poor job done by several implementations of the 1d cubic spline publications in Matlab's file exchange repos.This function was part of one of my

Spline Natural

determina los polinomios del spline natural de frontera liobre

Al introducir los valores de x y y a interpolar le halla los parametros y muestra las ecuaciones de forma grafica y numerica,spline cúbico natural o con frontera libreIngrese Los valores de x [x0

Mth Order Piecewise Spline Interpolation

A GUI that plots and gives equations for variable order intermediate splines.

GSP is a graphical user interface which takes x and y points as inputs, along with the order m, then outputs mth order splines between each of the x points. In most cases additional constraints are

Log-Periodic Dipole Antenna (LPDA)

Design of a Log-Periodic Dipole Antenna

This MATLAB code gives the complete design of a Log-Periodic Dipole Antenna (LPDA) provided the directivity and required bandwidth are known.

IRI 2012

International Reference Ionosphere 2012 model

Thin Plate Spline Network with Radiohead Example

Thin plate splines can be used to interpolate nonuniform data, such as the Radiohead dataset, which

A thin plate spline radial basis function network may be used to interpolate non-uniformly spaced data. The surface (or line or hypersurface) is fit exactly to the given control points, with the

B-spline tools

Basic toolbox for polynomial B-splines on a uniform grid. OO overloading of common operators.

B-splines is a natural signal representation for continous signals, wheremany continous-domain operations can be carried out exactly once theB-spline approximation has been done.The B-spline

RBF or Thin-Plate Splines Image Warping

Radial basis function/Thin-plate spline function and demo for 2D image warping.

Radial basis function/Thin-plate spline 2D image warping. [imo,mask] = rbfwarp2d( im, ps, pd, method) input: im: image 2d matrix ps: 2d source landmark [n*2] pd: 2d destin

Periodic Spirals (Basis of Fourier Series)

This is an interactive GUI illustrating Periodic Spirals. Read the description before download.

Poly Spline Interpolation with Pth Continuous Derivatives

This function fits a polynomial splines of order m with pth continuous derivatives to a given data (x,y).

% polysplinefitc% This function fits a polynomial splines of order m with pth continuous% derivatives to a given data (x,y).% it is valid for one dimension only.% the function uses

Analysis of Periodic, Aperiodic & Odd, Even Signal Via GUI

Analysis of Periodic, Aperiodic & Odd, Even Signal Via GUI

Analysis of Periodic, Aperiodic & Odd, Even Signal Via GUI

Chebfun - current version

Numerical computation with functions

Local maxima and minima of a pp spline

Determine the locations of local maxima and minima in a pp spline generated by pp = spline(x,Y);

This function uses vectorised methods to determine the locations of maxima and minima where they exist within a piecewise spline fit. The matlab built-in functions for determining the maxima and

Adaptive Gaussian Notch Filter for Removing Periodic Noise

Matlab Implementation of the paper "Adaptive Gaussian Notch Filter for Removing Periodic Noise from Digital Images"

Matlab Implementation of the paper Varghese, Justin, et al. "Adaptive Gaussian Notch Filter for Removing Periodic Noise from Digital Images" IET Image Processing, Institution of Engineering and

Fast Circular (Periodic) Cross Correlation

A fast circular cross correlation algorithm for periodic signals, using the FFT.

Uses fft to calculate the circular cross correlation of two periodic signal vectors.This is equivalent to xc(k)=sum(u1.*circshift(u2,k)), but much faster (on the order of 500 times faster for a 1024

Spline-MPPT for Partial Shading Conditions (PSC)

This project introduces a fast maximum power point tracking (MPPT) method for PV systems. The method is based on spline interpolation.

The attached file contains simulations of the following paper:Novel Spline-MPPT Technique for Photovoltaic Systems Under Uniform Irradiance and Partial Shading

immiscible LB

Implements Immiscible Lattice Boltzmann (ILB, D2Q9) method for two phase flows

Baseball Flight

To calculate the trajectory of a ballistic baseball with air drag, wind pressure, and magnus force (lift or curve).

Spline based function approximation for HDL synthesis

This is a suite of simple utilities that allow for efficient approximation of complex functions in a

This tool accepts a function handle for a "well behaved" function. It then automatically finds the best position for the knots for cubic spline approximation based on the error tolerance specified by

Smooth 3D bezier curves with implicit control points

Uses Hobby's algorithm to plot smooth curves in 3D through specified control points

This code can be used to draw 3D cubic splines by only entering the points through which the spline should pass.In other words, smooth curves can be drawn by simply defining occasional points through

3D Thin Plate Spline Warping Function

3D TPS warping function

CIRA Atmosphere

atmospheric conditions to 2000km

VMEC MATLAB

MATLAB interface to aid in plotting of VMEC output.

rod2d

Planar Cosserat rod

Xflow

Image analysis for Jet-in-crossflow data.

image data.Automated analysis for Sauter mean diameter of droplets, periodic features of the jet, and droplet and void statistics are possible with Xflow.Background reduction using user-selected

Arbitrage-Free Smoothing of the Implied Volatility Surface

Function to smooth call option prices and implied volatilities free of static arbitrage.

smoothing splines under shape constraints to estimate call option prices as a function of strike and time-to-maturity. Based on these prices, implied volatilities can be obtained.

OptimTraj -- Trajectory Optimization Library

A toolbox for Matlab, for solving continuous time trajectory optimization problems

Chebfun V4 - old version; please download current version instead

Numerical computation with functions

distPBC2D.m

calculate vector in periodic boundary conditions

calculate vec in periodic boundary conditionsthis function is used by the function radialDistribution2D

Gaussian Process Regression (GPR)

Gaussian Process Regression using GPML toolbox V4.2

Simuwave

A Simulink library for wavelet processing on 1-D signals

VASPLAB

MATLAB functions for processing data from the Vienna Ab initio Simulation Package (VASP).

hyperdistance from NEB calculation.neb_spline(directory,N)Fit energies and forces of a NEB calculation using a spline.num_images()Determine number of images used in a NEB calculation.number2chemsym(Z)Get the

modify_spline(spline,a,b,shiftx,shifty,scalex,scaley)

Spline object modification / transformation

A little piece of code enabling quick modification of spline objects: clipping, shifting, and scaling in both x, and y.

Surface Reconstruction using Implicit B-Splines

Using Implicit B-Splines for Surface Reconstruction out of 3D point clouds.

Using Implicit B-Splines for Surface Reconstruction out of 3D point clouds.Please cite the following paper, in case of using the code:Rouhani M. and Sappa A.D., Implicit B-spline fitting using the 3L

Surface Reconstruction using Implicit B-Splines (FAST)

Given a 3D cloud of points accompanied by normals an implicit b-spline surface is reconstructed.

A fast surface reconstruction is implemented in this set of codes. Given a 3D cloud of points accompanied by normal vectors an implicit b-spline surface will be reconstructed.Please cite the

H-infinity optimal causal IIR inverse filter for the cubic spline

This computes the H-infinity optimal causal filter (indirect B-spline filter) for the cubic spline.

Computes the H-infinity optimal causal filter (indirect B-spline filter) for the cubic spline.[INPUT]d: delay[OUTPUT]psi: the optimal filter psi(z) in a TF objectgopt: optimal valueThis file is based

Spline2D or Piecewise Continuous 2D Polynomials

Fit a 2D function with piecewise continuous polynomials

Spline2D is a work in progress. Currently it only matches C0 (continuous function) not C1 (continuous in 1st derivative) or C2 (continuous in 2nd derivative), which will be added later.Spline

ElasticMatrix Toolbox

The ElasticMatrix software uses the partial-wave method to model elastic wave propagation in multilayered anisotropic media.