为什么不使用smoothdata？根据我的经验，它工作得很好。

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%%
figure;
x = data(:,1); y = data(:,2);
plot(x, y, 'linewidth', 2.5)
xlim([-4, 4])
ylim([-0.5, 1.5])
hold on;
plot(x, smoothdata(y), 'linewidth', 2.5)

字符串

的数据