27 lines
698 B
Plaintext
27 lines
698 B
Plaintext
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Some processing thoughts:
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grep ^1 log | tail -n +119 > log-locked
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octave:
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octave:1> a=load("log-locked");
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octave:3> t=1:10000;
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octave:5> keith=a(:,3);
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octave:7> calib=a(1,4)
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calib = 1.9507
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octave:8> dac=a(:,5);
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octave:9> adc=a(:,6);
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octave:12> meas=-(dac - calib * adc);
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octave:25> plot(keith(t),meas(t))
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octave:48> [p, errorest] = polyfit(keith, meas, 1);
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octave:57> p
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p =
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20405.9116453934 -31177.1688297700
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octave:59> plot(t,keith(t) * p(1) + p(2),t,meas(t))
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octave:66> t=1:710872;
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octave:73> plot(t,keith(t) * p(1) + p(2) - meas(t))
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octave:75> axis([0 710872 10 -10])
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octave:76> # generally +- 5 over the entire range. this is on the scale of "dac values" so that's pretty damn good.
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