DIRDIFF Matlab script

Publisher review:
DIRDIFF - Directional derivative Xpf = dirdiff(X,f,p) generates directional derivative of symbolic scalar function f at the point p in the direction of symbolic vector X(p). p must be a cell array {p1,p2,..pn} of doubles or symbolic variables.examples syms x1 x2 x3 y1 y2 y3X = [ 2*x3 - x1^2 ; x1^3 - x3^2 ; x2^4 ] ;f = x1^2 x2^2 x3^2 ;dirdiff(X,f,{2,0,3}) returns Xpf = 3.5777dirdiff(X,f,{y1,0,0}) returns Xpf = -2*y1^3/(y1^4 y1^6)^(1/2) Requirements: · MATLAB Release: R14 · Symbolic Math Toolbox
Operating system:
Windows / Linux / Mac OS / BSD / Solaris

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