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trying to plot a harmonic function, but i keep getting an fplot error.

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layth ibrahim
layth ibrahim 2021-11-2
回答： Star Strider 2021-11-2
code:
clear all
clc
syms x y
u = x^2 - y^2;
for c = 2:2:20
result(:,c) = solve(u == c);
end
fplot(result)
error:
Operands to the logical and (&&) and or (||) operators must be convertible to logical scalar values.
Error in fplot (line 119)
~all(feval_internal(symengine,'symobj::map',formula(fn{k}),'testtype','Type::Arithmetical'))

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采纳的回答

Star Strider
Star Strider 2021-11-2
Ran in:
Try this —
syms x y
u = x^2 - y^2;
figure
hold on
for c = 2:2:20
result = solve(u == c);
fplot(result)
end
hold off
grid
.

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