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Highly oscillatory function

Highly oscillatory function.png

The above picture shows the highly oscillatory function

It was produced by Matlab with the following script

X = linspace(-2,2,1000);
Y = ((X-1/4).^3/6 + 1) .* sin(30*X);
plot([-2 2], [0 0], ':k', X, Y, 'r');
axis([-2 2 -2 2]);
axis off;
box off;
print -dpng -r50 'hof.png';

The resulting PNG was cropped with convert -trim hof.png Highly_oscillatory_function.png