Image:Fourier heat in a plate.png

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Source	self-made
Date
Author	Loisel (talk)
Permission (Reusing this image)	See below.

MATLAB snippet:

f=@(x,y,n) 2*(((-1).^(2:n+1))./((1:n).*sinh((1:n).*pi))) ...
    * (sin((1:n)'*x).*sinh((1:n)'*y));
ys=0:0.01:pi;
g=[];
for y=ys
    n=max(20,min(100,-10*log(pi-y)/(pi-y)));
    g=[g;f(ys,repmat(y,1,length(ys)),n)];
end
g(end,:)=ys';
imagesc(ys,ys,g(end:-1:1,:));
axis square
axis off

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	Date/Time	Dimensions	User	Comment
current	22:32, 15 February 2008	672×504 (12 KB)	Loisel (Talk \| contribs)	(Had to flip MATLAB's silly y coordinates.)
	22:24, 15 February 2008	875×672 (13 KB)	Loisel (Talk \| contribs)	({{Information \|Description= \|Source=self-made \|Date= \|Location= \|Author=~~~ \|Permission= \|other_versions= }} MATLAB snippet: f=@(x,y,n) 2(((-1).^(2:n+1))./((1:n).sinh((1:n).pi))) ... (sin((1:n)'x).sinh((1:n)'*y)); ys=0:0.01:pi; g=[]; for y=ys)