Numerical computing with functions

% Define two functions f = chebfun(@(x) sin(x.^2)+sin(x).^2, [0,10]); g = chebfun(@(x) exp(-(x-5).^2/10), [0,10]); % Compute their intersections rr = roots(f - g); % Plot the functions plot([f g]), hold on % Plot the intersections plot(rr, f(rr), 'o')

% The Dixon-Szego function f = @(x,y) (4-2.1*x.^2+ x.^4/3).*x.^2 ... + x.*y + 4*(y.^2-1).*y.^2; % Create a chebfun2 F = chebfun2(f, [-2,2,-1.25,1.25]); % Find the minimum and mark it [minf,minx] = min2(F); contour(F,30), hold on plot(minx(1),minx(2),'.w')

Latest news

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12 December 2014/What's new in Chebfun Version 5.1

We are pleased to announce the release of Chebfun Version 5.1 for numerical computing with 1D and 2D functions.
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29 August 2014/Release notes for v5.0.1

Chebfun Version 5.0.1 has been released. Mostly the new release consists of minor bug fixes and improvements.

Chebfun—numerical computing with functions

Latest news

12 December 2014/What's new in Chebfun Version 5.1

29 August 2014/Release notes for v5.0.1

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