Compute error between two graphs, each graph contains point data forming multiple curves.

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Cardim
Cardim 2023-1-8
评论： Matt J 2023-1-20
I have a experimental x-y data which forms multiple intersecting and non-intersecting curves. I then have another x-y data which comes from simulation containing similar x-y data. How to I compute the error between those two graph. In the end, I want to match the experimental x-y data with the simulation x-y data.
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回答（2 个）

Matt J
Matt J 2023-1-8
编辑：Matt J 2023-1-8
You can use pdist2,
Error=vecnorm( pdist2([x1,y1] ,[x2,y2],'euc','Smallest',1) )
Sulaymon Eshkabilov
Ran in:
There are a few ways to do it.
x=linspace(0, 2*pi);
f = 3.5*sin(2*x); % Fit model
y = f+randn(size(x)); % Experimental data
scatter(x,y), hold on
plot(x,f, 'k-'), grid on
df = abs(f)-abs(y); % The difference (Error)
figure
plot(1:numel(x), df)
title('Error')
ylabel('Error')
xlabel('Data orders')
grid on

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