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

Create and apply GMT-style colormaps in Matlab (color, gradient, colormap)

cptcmap(varargin)

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)

Inverse (integrated) gradient by John D'Errico

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

consolidator(x,y,aggregation_mode,tol)

intgrad1(fx,dx,f1,method)

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

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

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

RunThermistorExample()

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

VEMap(x)

Conditionally Colored Plot (CCPLOT) by Michael Heidingsfeld

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

ccplot(x,y,c,map)

Adaptive Robust Numerical Differentiation by John D'Errico

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

derivest_demo

multivariable_calc_demo

derivest(fun,x0,varargin)

DGradient by Jan Simon

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

DGradient(X, Dim, Spacing, Method) %#ok<STOUT,INUSD>

uTest_DGradient(doSpeed)

Add a background gradient to plots by Scott Hirsch

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

addgradient(ax,topcolor,bottomcolor)

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

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

CircularHough_Grd(img, radrange, varargin)

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

diffxy by Darren Rowland

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

demo_diffxy

diffxy(x,y,varargin)

Gradient from Neural Network by Alan Jennings

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

NN_DerivativeValidate

NN_GradientFunction(net)

Derivative-based Optimization by Nassim Khaled

Derivative-based Optimization using The Gradient Descent (3d, derivative, minimum)

Gradient_Descent_maximum.m

Gradient_Descent_minimum.m

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

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)

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

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

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

convexchecker by Bapi Chatterjee

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

convexchecker.m

gradient8 by Wolfgang Schwanghart

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

gradient8(DEM,res)

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

Companion Software (gradient, nonlinear, linear)

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central_diff.m by Robert Canfield

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

central_diff( F, x )

central_diff_test.m

cpcg.m by Leevan Ling

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

cpcg(a, b, tol, max_it, c, x0)