Plotting implicit functions via fimplicit
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Hello,
I have the following anonymous function:
L = 5000;
F = 11500;
E = 70000;
cP = @(B,H)[H.*(B.^-1)-6, 6.*F.*L.*((B.*H.^2).^-1)-50,...
4.*F.*L.^3.*((E.*B.*H.^3).^-1)-12.7];
Now I want to plot each curve in the vector via
interval = [0 500 0 500];
fimplicit(cP,interval);
This does not work. I suppose fimplicit expects only one curve and could not handle the vector containig the curves.
So, how can I access the each curve, i.e H.*(B.^-1)-6=0, which are in the vector and pass it to fimplicit so that fimplicit can handle it?
Thanks in advance,
Michael
采纳的回答
Apparently (this behavior appears to be undocumented), you can pass a cell array of function handles to fimplicit, as in:
L = 5000;
F = 11500;
E = 70000;
interval = [0 500 0 500];
% cP = @(B,H)[H.*(B.^-1)-6, 6.*F.*L.*((B.*H.^2).^-1)-50,...
% 4.*F.*L.^3.*((E.*B.*H.^3).^-1)-12.7];
cP = { ...
@(B,H)H.*(B.^-1)-6, ...
@(B,H)6.*F.*L.*((B.*H.^2).^-1)-50, ...
@(B,H)4.*F.*L.^3.*((E.*B.*H.^3).^-1)-12.7, ...
}
figure
fimplicit(cP,interval);
Since it is undocumented, I don't which MATLAB versions support this, so you may have to use each one separately:
figure
for ii = 1:numel(cP)
fimplicit(cP{ii},interval);
hold on
end
2 个评论
Michael Haag
2023-9-20
编辑：Michael Haag
2023-9-20
You're welcome!
Yeah, I was surprised to discover (accidentally, while writing my answer) that the cell array of function handles works. The documentation lists only a function handle as the supported class for the first input to fimplicit (no mention of cell arrays):
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