Question: Plot residuals

y := t -> 0.7*sin(300*t);
filenm := "https://www.gw-openscience.org/GW150914data/P150914/fig2-unfiltered-template-reconstruction-H.txt";
K := ImportMatrix(filenm, source = Matlab, skiplines = 1);
plot([K[() .. (), [1, 3]], y(t)], t = 0.35 .. 0.4);

I want to plot the residuals for this. Any ideas how? Thanks.

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