Convert discontinuos angles to continuous angle

2014 5 23
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更新时间：2014 5 24
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Hi, I need help to convert discontinuous angles to continuous angle in my plots, anyone to help me? I saw something to matlab simulink, but I would want to change in code. Thank you for your help.
For other words, I have this plot,
and I want to convert for this plot,
Best wishes, Paulo Oliveira

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Matt J
Matt J 2014-5-23

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idx=theta>0;
theta(idx)=theta(idx)-360;

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Paulo Oliveira
Paulo Oliveira 2014-5-23
Both improve the function, but it is not the solution for my problem. Thanks.
Paulo Oliveira
Paulo Oliveira 2014-5-23
Matt J, What was your reasoning to apply this formula? Explain me, to try modify. Thanks. Best wishes
Matt J
Matt J 2014-5-23
Your figure makes it looks like the positive theta have been pushed up by a simple uniform 360 degree jump relative to the desired curve. I proposed just to subtract that jump off again.
Paulo Oliveira
Paulo Oliveira 2014-5-23
Yes, your reasoning is right, but I have too negative theta, the image is not real is just a example, but I put my matrix for you test, ok?
Matrix: -81.5032 -81.0033 -80.3730 -79.6162 -78.7395 -77.7483 -76.6428 -75.4151 -74.0509 -72.5332 -70.8465 -68.9806 -66.9335 -64.7122 -62.3332 -59.8229 -57.2177 -54.5626 -51.9075 -49.3014 -46.7880 -44.4037 -42.1773 -40.1307 -38.2797 -36.6360 -35.2065 -33.9931 -32.9907 -32.1874 -31.5654 -31.1028 -30.7734 -30.5467 -30.3897 -30.2694 -30.1534 -30.0111 -29.8126 -29.5278 -29.1260 -28.5767 -27.8513 -26.9262 -25.7832 -24.4111 -22.8068 -20.9803 -18.9584 -16.7868 -14.5269 -12.2513 -10.0374 -7.9576 -6.0700 -4.4133 -3.0059 -1.8485 -0.9274 -0.2148 0.3314 0.7664 1.1556 1.5743 2.1153 2.9088 4.1650 6.3004 10.5024 23.6964 145.5493 177.4513 -173.6526 -166.1859 -157.8700 -148.0553 -136.7891 -124.7509 -112.9791 -102.3417 -93.2169 -85.5723 -79.1925 -73.8367 -69.3017 -65.4342 -62.1261 -59.3062 -56.9309 -54.9734 -53.4137 -52.2305 -51.3988 -50.8891 -50.6660 -50.6885 -50.9109 -51.2841 -51.7581 -52.2864 -52.8275 -53.3476 -53.8203 -54.2272
See the plot and you understand me, perfectly :)
Thanks Best wishes
Matt J
Matt J 2014-5-23
You could also try unwrap().
Paulo Oliveira
Paulo Oliveira 2014-5-23
I already tried unwrap, but this function is just used in rad and in Biomechanics the rad is the SI, but the athletes understand better in degrees. Yes, unwrap is a solution, but I like more your first idea, I have explore more.
Matt J
Matt J 2014-5-23
but this function is just used in rad
Working in degrees would be just a simple modification
unwrap(thetaDegrees*pi/180)*180/pi;
Paulo Oliveira
Paulo Oliveira 2014-5-24
Yap, it works perfectly. Thank you very mush. ;)
Best wishes PO

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