image thumbnail

updated 19 days ago

Wavelet based Image Reconstruction from Gradient Data by E

E (view profile)

A toolbox for reconstructing images from gradient data. (image processing, gradient, poisson solver)

Reflect.m

Ad_GWN(X,targetSNR,st)

CombineRGB(R,G,B)

image thumbnail

updated 1 month ago

Color Palette Tables (.cpt) for Matlab by Kelly Kearney

Kelly Kearney (view profile)

Create and apply GMT-style colormaps in Matlab (color, gradient, r2014b graphics ready)

image thumbnail

updated 4 months ago

Forward difference gradient approximator by Sean Wu

Approximates the gradient of a function of n variables using a forward difference approximation. (gradient, forward difference)

fwd(fcn,x,r)

image thumbnail

updated 4 months ago

Central Difference Gradient Approximator by Sean Wu

Approximates the gradient of a function of n variables using a central difference approximation. (central difference, gradient)

central(fcn,x,r)

image thumbnail

updated 6 months ago

Add a background gradient to plots by Michelle Hirsch

Add a background gradient to plot axes to make them look a little fancy. (graphics, utility, gradient)

image thumbnail

updated 6 months ago

The calculation of the gradient by shayan raei

Corona has caused the loss of electrical power transmission lines will also reduce efficiency. (conductor surface gra..., gradient, transmission lines)

cal(ii)

q_cal(p)

main.m

image thumbnail

updated 7 months ago

Multi-exposure and Multi-focus Image Fusion in Gradient Domain by Sujoy Paul

An algorithm for fusion of a stack of multi-exposure and multi-focus images (image processing, image fusion, multiexposure)

ReconstructGradient.m

ChannelNorm(I,r)

GradientFusion(I)

image thumbnail

updated 7 months ago

Adaptive Robust Numerical Differentiation by John D'Errico

John D'Errico (view profile)

Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian (hessian, jacobian, toolbox)

derivest_demo

multivariable_calc_demo

derivest(fun,x0,varargin)

image thumbnail

updated 7 months ago

Radial Basis Function Network by Travis Wiens

Travis Wiens (view profile)

Simulates and trains Gaussian and polyharmonic spline radial basis function networks. (radial basis function, rbf for suren, radial basis function...)

rbf_integral(Xc,X1,X2,k_i,basisfunction)

rbfn_integral(Xc,X1,X2,W,k_i,basisfunction)

sim_rbf(Xc,X,W,k_i,basisfunction)

image thumbnail

updated 9 months ago

Symbolic Derivatives for Econometric Tests by Alan Weiss

How to calculate derivatives required by Econometric Toolbox tests via Symbolic Math Toolbox (symbolic, econometrics, jacobian)

symbolic_econometric_tests.m

image thumbnail

updated 1 year ago

MeasureClick - measure between two clicks quickly by Matthew Arthington

Quickly display the distance and gradient between two clicks (plot, figure, dialogue box)

measureClick(varargin)

image thumbnail

updated 1 year ago

circular diff by Petorr

diff with wrap-around differences, same sized output matrix (diff, circular, difference)

difc(varargin)

image thumbnail

updated 1 year ago

FUNC2MAT: Convert linear function to matrix by Matt J

Matt J (view profile)

A utility to obtain the matrix representing a given linear function (linear function, matrix form, gradient)

A=func2mat(fun,Xtypical,varargin)

image thumbnail

updated 1 year ago

diffe by Marco Borges

euclidian differentiation (diff, differential equation..., gradient)

diffe(x,range)

image thumbnail

updated almost 2 years ago

Computing Electric field of a double dipole by solving Poisson's Equation by Praveen Ranganath

This code computes the E-fields due to 2-dipoles in a 2-D plane using Finite difference method. (aerospace, cartesian coordinates, dipole)

Poisson2d_dipole.m

image thumbnail

updated 2 years ago

TRIGRADIENT.M by Mick Warehime

Fast approximation to the gradient for scattered data and for data defined by a triangulation. (triangulation, gradient, delaunay)

trigradient(x,y,z,t,opt)

image thumbnail

updated 2 years ago

Inverse (integrated) gradient by John D'Errico

John D'Errico (view profile)

Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients (integration, cumulative, gradient)

consolidator(x,y,aggregation_mode,tol)

intgrad1(fx,dx,f1,method)

intgrad2(fx,fy,dx,dy,f11)

image thumbnail

updated 2 years ago

Files for the 2012 Webinar "Tips and Tricks - Getting Started Using Optimization with MATLAB" by Seth DeLand

Seth DeLand (view profile)

These are the files that were used for the demonstrations in the webinar. (optimization, global optimization, fmincon)

RunThermistorExample()

ThOptimPlotCircuit(options,state,flag,Tdata,VData,Res,ThV...

VEMap(x)

image thumbnail

updated almost 3 years ago

Conditionally Colored Plot (CCPLOT) by Michael Heidingsfeld

Plots conditionally colored (2D line) graphs. (plot, visualization, color)

ccplot(x,y,c,map)

image thumbnail

updated 4 years ago

DGradient by Jan Simon

Jan Simon (view profile)

Gradient of arrays as fast C-Mex (derivative, gradient, array)

DGradient(X, Dim, Spacing, Method)

uTest_DGradient(doSpeed)

image thumbnail

updated 4 years ago

Detect circles with various radii in grayscale image via Hough Transform by Tao Peng

Tao Peng (view profile)

Detect circular shapes in a grayscale image. Resolve their center positions and radii. (image analysis, circular hough transf..., various)

CircularHough_Grd(img, radrange, varargin)

DrawCircle(x, y, r, nseg, S)

image thumbnail

updated 4 years ago

diffxy by Darren Rowland

Second-order accurate numerical differentiation (N-dimensional) (derivative, differentiation, gradient)

demo_diffxy

diffxy(x,y,varargin)

image thumbnail

updated almost 5 years ago

Gradient from Neural Network by Alan Jennings

Alan Jennings (view profile)

Function that takes a NN and creates a new NN that gives the gradient. (neural networks, function, gradient)

NN_DerivativeValidate

NN_GradientFunction(net)

image thumbnail

updated 5 years ago

Derivative-based Optimization by Nassim Khaled

Nassim Khaled (view profile)

Derivative-based Optimization using The Gradient Descent (gradient, descent, minimum)

Gradient_Descent_maximum.m

Gradient_Descent_minimum.m

image thumbnail

updated 5 years ago

der.m v1.0 (Nov, 2009) by Carlos Adrian Vargas Aguilera

Estimates first derivative of an array by using POLYFIT locally on each point ignoring NaNs! (diff, gradient, derivative)

der(X,DT,W,DEG,PAD,DIM)

image thumbnail

updated almost 6 years ago

nanderivative.m v2.1 (Jul 2009) by Carlos Adrian Vargas Aguilera

N-order derivative of vector data by interpolating nearby points, ignoring NaNs. (approximation, interpolation, diff)

nanderivative(Y,X,N,K,MET)

image thumbnail

updated 6 years ago

convexchecker by Bapi Chatterjee

Bapi Chatterjee (view profile)

It checks real valued multidimensional function, whether it is convex. (optimization, finance, convex)

convexchecker.m

image thumbnail

updated 7 years ago

gradient8 by Wolfgang Schwanghart

8-connected neighborhood gradient and aspect of a digital elevation model (gradient, aspect, exposition)

gradient8(DEM,res)

image thumbnail

updated 12 years ago

Iterative Methods for Linear and Nonlinear Equations by C.T. Kelley

Companion Software (mathematics, iterative methods, linear)

...

...

...

image thumbnail

updated almost 14 years ago

central_diff.m by Robert Canfield

Calculates a numeric gradient using second-order central difference formula (approximation, interpolation, central)

central_diff( F, x )

central_diff_test.m

image thumbnail

updated almost 15 years ago

cpcg.m by Leevan Ling

CPCG -CIRCULANT PRECONDITIONED CONJUGATE GRADIENT METHOD. (linear algebra, circulant, preconditioned)

Contact us