HW #10
Due: 11/20/2023
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Submission Instructions: (Important! If you do not follow them, your paper is not graded.)



1. Remove noise from the signal below and plot the original signal less noise.
(MATLAB/Octave users)
y=[6.28345, 3.22246, 5.39914, 3.60865, 3.65644, 4.9384, 6.71493, 4.66608, 4.95818, 4.87514, 3.65405, 5.58718, 4.40297, 3.56216, 4.26301, 7.17059, 3.8773, 3.65189, 2.62594, 6.38777, 5.10231, 4.97363, 4.92931, 6.88091, 4.02733, 4.91927, 5.35723, 5.22676, 4.93593, 3.10154, 3.80014, 4.06031, 4.0938, 2.32529, 2.33921, 2.54891, 1.34026, 2.67622, 0.942549, 4.21709, 2.67793, 1.7866, 3.44514, 0.0870244, -0.296949, -0.0974269, 3.39252, -0.730539, 1.95505, 2.28344, 0.691118, 1.63496, 3.37392, -0.796132, 3.18227, 2.27203, 2.54027, 1.34103, -0.0650801, 2.77979, 0.714989, -0.835475, 0.531536, 1.98343, -0.335429, 1.24667, 0.81676, 1.38371, 0.667464, 2.42286, 1.00915, -0.0767671, 2.68488, -0.8332, 2.4854, 1.54572, 1.3195, 4.73976, 0.990827, 1.99647, 3.02067, 2.3319, 2.73444, 1.29938, 4.91075, 1.16644, 1.53354, 4.70443, 3.47393, 3.30089, 3.79532, 2.69182, 4.33596, 1.89338, 3.20495, 2.26482, 4.02946, 4.99474, 2.44974, 2.19765, 3.03248, 2.99834, 5.27905, 4.484, 1.15131, 4.72466, 4.10129, 4.63075, 2.25385, 3.92437, 4.09418, 3.91403, 1.342, 1.18493, 2.21738, 2.8371, 1.28084, 4.20303, 3.24356, 3.70767, 2.99487, 1.75703, 2.94221, 3.75199, 1.57677, 2.51171, 5.17309, 1.45874, 3.7486, 2.98649, 4.31283, 3.06652, 2.98886, 1.06716, 3.79495, 2.95823, 3.86032, 2.09225, 2.44123, 2.30055, 4.37755, 3.12176, 3.90007, 1.82306, 2.71626, 4.70279, 2.9145, 1.78829, 5.05247, 5.75262, 4.72955, 5.63518, 4.70264, 2.93391, 5.29481, 5.67629, 3.21819, 3.58788, 6.99283, 6.66301, 6.87711, 1.91899, 5.12603, 3.32968, 5.6337, 3.56705, 3.56726, 3.27185, 5.77811, 7.05581, 6.19436, 1.93323, 6.78286, 5.59857, 5.15317, 5.77036, 5.11903, 3.79379, 5.02595, 3.97256, 4.76766, 4.2986, 5.9101, 3.75019, 4.45336, 3.41256, 2.3897, 4.65437, 4.19994, 1.80178, 1.92235, 2.58043, 1.8049, 0.727705, 2.23352, 3.20678, 1.99824, -0.100039, -0.398669, 1.0254, 1.06878, 0.779708, 0.592887, 1.63836, 0.022458, 2.04382, 0.924611, 1.87949, -0.219661, 2.75017, 2.97187, 0.445748, 0.558413, 0.162202, 2.50927, 1.02211, 2.84669, 3.30699, 0.326872, 3.81569, 0.825398, 1.34227, 2.13528, 3.29024, -0.0106859, 3.46575, 1.8493, 2.85042, 1.55254, 2.14178, 3.87732, 2.93549, 3.72309, 2.3297, 0.492662, 2.01528, 3.55222, 3.57302, 2.80209, 3.99803, 2.50128, 3.18386, 2.12652, 3.82451, 3.95133, 1.21219, 3.24286, 4.94487, 3.599, 3.23689, 0.814642, 3.30503, 4.32353, 2.1707, 2.38114, 2.56006];

(Mathematica users)
y={6.28345, 3.22246, 5.39914, 3.60865, 3.65644, 4.9384, 6.71493, 4.66608, 4.95818, 4.87514, 3.65405, 5.58718, 4.40297, 3.56216, 4.26301, 7.17059, 3.8773, 3.65189, 2.62594, 6.38777, 5.10231, 4.97363, 4.92931, 6.88091, 4.02733, 4.91927, 5.35723, 5.22676, 4.93593, 3.10154, 3.80014, 4.06031, 4.0938, 2.32529, 2.33921, 2.54891, 1.34026, 2.67622, 0.942549, 4.21709, 2.67793, 1.7866, 3.44514, 0.0870244, -0.296949, -0.0974269, 3.39252, -0.730539, 1.95505, 2.28344, 0.691118, 1.63496, 3.37392, -0.796132, 3.18227, 2.27203, 2.54027, 1.34103, -0.0650801, 2.77979, 0.714989, -0.835475, 0.531536, 1.98343, -0.335429, 1.24667, 0.81676, 1.38371, 0.667464, 2.42286, 1.00915, -0.0767671, 2.68488, -0.8332, 2.4854, 1.54572, 1.3195, 4.73976, 0.990827, 1.99647, 3.02067, 2.3319, 2.73444, 1.29938, 4.91075, 1.16644, 1.53354, 4.70443, 3.47393, 3.30089, 3.79532, 2.69182, 4.33596, 1.89338, 3.20495, 2.26482, 4.02946, 4.99474, 2.44974, 2.19765, 3.03248, 2.99834, 5.27905, 4.484, 1.15131, 4.72466, 4.10129, 4.63075, 2.25385, 3.92437, 4.09418, 3.91403, 1.342, 1.18493, 2.21738, 2.8371, 1.28084, 4.20303, 3.24356, 3.70767, 2.99487, 1.75703, 2.94221, 3.75199, 1.57677, 2.51171, 5.17309, 1.45874, 3.7486, 2.98649, 4.31283, 3.06652, 2.98886, 1.06716, 3.79495, 2.95823, 3.86032, 2.09225, 2.44123, 2.30055, 4.37755, 3.12176, 3.90007, 1.82306, 2.71626, 4.70279, 2.9145, 1.78829, 5.05247, 5.75262, 4.72955, 5.63518, 4.70264, 2.93391, 5.29481, 5.67629, 3.21819, 3.58788, 6.99283, 6.66301, 6.87711, 1.91899, 5.12603, 3.32968, 5.6337, 3.56705, 3.56726, 3.27185, 5.77811, 7.05581, 6.19436, 1.93323, 6.78286, 5.59857, 5.15317, 5.77036, 5.11903, 3.79379, 5.02595, 3.97256, 4.76766, 4.2986, 5.9101, 3.75019, 4.45336, 3.41256, 2.3897, 4.65437, 4.19994, 1.80178, 1.92235, 2.58043, 1.8049, 0.727705, 2.23352, 3.20678, 1.99824, -0.100039, -0.398669, 1.0254, 1.06878, 0.779708, 0.592887, 1.63836, 0.022458, 2.04382, 0.924611, 1.87949, -0.219661, 2.75017, 2.97187, 0.445748, 0.558413, 0.162202, 2.50927, 1.02211, 2.84669, 3.30699, 0.326872, 3.81569, 0.825398, 1.34227, 2.13528, 3.29024, -0.0106859, 3.46575, 1.8493, 2.85042, 1.55254, 2.14178, 3.87732, 2.93549, 3.72309, 2.3297, 0.492662, 2.01528, 3.55222, 3.57302, 2.80209, 3.99803, 2.50128, 3.18386, 2.12652, 3.82451, 3.95133, 1.21219, 3.24286, 4.94487, 3.599, 3.23689, 0.814642, 3.30503, 4.32353, 2.1707, 2.38114, 2.56006};

hw_10_01.jpg
Describe how you can get the result. Listing your code is accepted.
2. Monthly sunspots activities data from January, 1749 to September, 2016 (268 years = 3213 months) are given below. source
Source:https://solarscience.msfc.nasa.gov/SunspotCycle.shtml
Zurich_Color_Small.jpg
For MATLAB/Octave users:
x=[96.7,104.3,116.7,92.8,141.7,139.2,158,110.5,126.5,125.8,264.3,142,122.2,126.5,148.7,147.2,150,166.7,142.3,171.7,152,109.5,105.5,125.7,116.7,72.5,75.5,94,101.2,84.5,110.5,99.7,39.2,38.7,47.5,73.3,58.3,83.3,118.3,98.8,99.5,66,130.7,48.8,45.2,77.7,62.7,66.7,73.3,53.3,76.2,63.3,60,52.8,36.7,65,46.7,41.7,33.3,11.2,0,5,2.8,22.8,34.5,44.5,31.3,20.5,13.7,40.2,22,7,17,18.7,11.3,10.8,0,0,14.3,5.3,29.7,39.5,11.3,33.3,20.8,11.8,9,15.7,20.8,21.5,6,10.7,19.7,23.8,28.3,15.7,23.5,35.3,43.7,50,63.5,21.3,41.7,85.5,66.2,54.2,107.8,55.8,62.7,86.7,81.7,120.5,77.3,75,73.3,64.5,104.2,62.8,71.7,71.7,80.5,73.3,78,78.3,81.7,83.3,85,118.8,128.7,99.5,77.2,95,112.2,99.2,124.5,97.2,120,80.5,110,126,102.2,84.3,99.5,101.7,116.7,151.7,134.5,119.5,178.7,165.5,156.8,151.8,167.8,147.8,149.5,76.7,73,121.3,76.2,100.3,66.5,128.5,56.3,112.8,114.2,115.5,129.7,128.7,94.2,53.2,57,54.8,54.5,59.7,90.3,44.2,113.5,77.2,101.5,102.3,99.5,99.5,67,57.3,73.8,50,50,50,47,46.7,43.3,42.8,40,43.3,41.7,36.7,33.7,33.3,45,49.5,26.7,23.3,23.3,21.7,20,18.3,61,10,44.7,5,5.5,6.7,7.2,8.3,9.5,32,45.7,50,71.7,54.8,49.7,55.5,36.5,68,71.2,73.5,91.2,88.8,89.2,110.2,77.2,71.2,129.5,129,87.7,111.3,124.7,129.7,151,186.3,123.2,107,107.2,161.2,122.7,157.3,197.7,200.5,248,263.7,246.8,186.7,173.3,237.5,133.5,85,116.8,138.8,183,210.5,174,172.7,220.3,170.5,60,77,77.8,108.2,254.5,199.2,112.8,97.5,169,150,166.2,159.5,168.2,151.3,51.8,153.7,63.3,95,128.8,93.7,84.2,131,102.2,106.7,91,48.3,85.3,54.8,68.5,47.3,46.2,21.2,48.8,43.8,68.2,72,78,109,92.8,73,85.5,47.5,29.2,11,13.2,23.3,29.5,20.3,7.3,0,19.3,18.7,6.5,20.5,1.7,13.2,5.3,9.3,25.2,13.2,36.2,19.3,10.5,36.3,18.7,31.7,1.7,40.3,26.7,50,58.3,66.7,75,60.8,65,159.2,133.8,134.5,158.3,186.7,193.7,177.5,243.3,262.2,295.5,182.2,223.3,241.7,398.2,286,255,233.3,286.2,260.5,250.5,175,191.2,276.2,196.7,241.7,233.3,189.5,238.3,186.7,185,206.7,190,183.3,116.7,163.3,163.3,158.3,178.7,146.7,143.3,143.3,156.2,128.3,100,97.8,164.5,124.5,88.3,113.8,174.5,162.8,122.5,110,85,45.5,111.7,58.7,90,62.5,61.7,68.3,90.5,63.3,61.7,73.3,56.7,38.7,52.5,50,46.7,64.5,44.5,47.2,38.3,42,53.7,33.3,30,13.3,25,17.5,21.7,13.3,18.3,16.7,10,15,10,16.7,16.7,13.3,28.3,23.3,10.8,13.3,15,26.2,34.5,43.8,60.5,33.3,53.3,78.7,67,45.5,62,79.3,79.5,142.3,153.8,98.3,138.3,149.5,185.8,187.2,193.3,187.8,224.5,176.7,145.7,212,224.7,165.3,213.3,228.7,262.2,261.7,235.8,290,230,215.3,238.8,180.8,188.3,257,235.8,226.7,235,236.7,157.8,215.8,190,208.8,200,205.5,205.8,200,195,171.7,186.7,149.5,223.3,225.8,171.7,212.5,160.5,156.7,155,151.7,115.5,145,128.8,140.5,136.7,123.3,121.2,103.3,123.3,128.7,122.8,107,118.3,71.7,110.8,102.8,111.7,110,96.7,106.7,105,126.2,103.3,101.7,76.3,100,98.3,98.3,95,93.3,93.3,91.7,92.5,88.3,87.2,85,83.3,48.8,40,78.3,73.3,76.2,75,73.3,63.3,47.3,92.8,69.2,68.3,66.7,18.5,47.5,112.3,85.7,35.7,66.5,21,31,51.7,28.5,21.5,42.8,22.5,32.5,41.7,30,36.7,39.7,26.2,52.8,35,11.2,44.8,2.5,30.7,18.3,14,8.5,24,7,6.7,6.7,12.2,18.5,7.2,10,9.5,11.5,9.7,5,3.3,6.7,20.7,1.8,0,0,0,5,4,2.5,20.8,16.5,2.7,21,36.2,14,13.7,17.7,3.5,0,0,7.7,4.5,14.3,11.5,15.5,23.2,0,8.3,39.5,35,32.5,19.2,20.5,17.5,66.8,45,48.3,50,51.7,53.3,52,58.3,64.5,55.8,54.3,66.3,80.3,79.7,78.3,68,70,73.3,76.7,80,83.3,86.3,64.2,57.5,83.3,83.3,84.7,49.2,41.7,73.8,60,80.5,56.8,75.5,90.5,85,80,75.5,80.5,80,84.3,55.7,58,49.7,71.8,88.3,103.8,101.7,100,101.7,73.5,85.7,62.5,65,67.5,62.7,71.2,74,49,68.3,63.8,65,49.3,54.5,46.2,44,42.7,50,43.8,40,45,41.7,40,20,20.3,16,39.7,16.7,20,21.2,20,9.5,13.3,4.3,0,0,7.5,0,20.5,22.5,22.5,11.2,13.3,19.5,7.8,17.5,20.5,12,15.3,1.5,4.2,3.3,12.8,0.5,0.3,0.7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,0,4,10.2,1.3,1.8,18.8,3.2,1.2,0,1.7,2.2,0.8,26,8.7,6.5,13.2,16.8,0,17.2,3.2,27.7,9.2,18.7,30.5,14,25.5,46.3,27.8,23.8,37,20,9.5,39.7,9.7,24.8,30.8,3.8,13.5,32.2,24.2,33.5,32,53.7,43.7,52.7,16.3,93.2,59.2,78.7,52.5,55.8,62,108.3,43.8,114.7,122.8,98,73.8,72.7,64.7,38.7,79.7,94,63.5,49.8,60.7,96.5,160.3,44,35.3,66.7,83.3,75,61.2,42.7,48.2,47.3,58.1,37.4,42.4,57.5,88.5,60.8,46.8,52.6,43.4,52.8,18.3,43,54.7,34.6,6.3,33.7,32.6,58.3,52.5,43.5,24.8,45.9,41.8,50.9,32,44.4,7.5,32.3,48.9,17.9,34.1,43.1,8.6,14.9,13.2,15.1,36,7,9.5,15.2,2.8,3,4.3,8,7.3,31.4,7.3,0.4,0,1.5,26.9,21.7,2.4,9.3,13.2,3.4,0,0.6,0,0,0,0,1,0,0,0,0.8,0,0,0,0,34,36,18,0,32.3,4.6,0,0,2.3,34.3,42,0,1.4,8.4,25.9,37.4,6.2,25.8,25.6,51.5,42.8,26.2,26,19.6,36.7,29.4,30.2,61.3,40,53.9,61.7,87.5,66,31.6,84.4,65.8,113.6,57.7,79,96.3,76.7,93.8,94.4,70.4,89.4,82.6,93.5,80.4,76.8,88,107.3,108.5,101.9,148.6,163.4,90.4,127.3,83.9,91.1,95,78.1,71.6,82.3,120.6,158.4,112.3,123.2,151.5,129.3,88,95.3,112.7,94.1,87,120.1,141,177.3,110.5,108.4,73.2,84.6,103.4,140.6,135.4,136.8,79,83.6,155.8,90.9,63.4,55.6,75.4,91.6,63.2,77.1,72.5,48.3,51.5,92.6,91.9,44.8,68.9,44.5,23.3,14.8,13.7,35.2,23.8,45.8,18.7,24.9,19.6,4.6,21.5,1.7,11.6,9.5,19.3,12.5,9.8,16.6,8.2,30.1,6.5,2.4,14.8,13.1,14.4,6.6,19.2,41.3,50.9,57.5,12.4,40.7,32.7,102.4,72.6,55.2,99.6,98.5,168,158.6,166.7,129.3,147.6,179.4,163.7,238,185.7,207.9,194.6,179.6,158.5,228.9,201.5,343.8,313.4,292.6,224.3,230.3,186.1,263.4,2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(For Mathematica users)
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hw_10_02.jpg
From these data points, estimate the cycle (in years) of sunspot activities.


3.

    (a) Draw a graph of H(xa) − H(xb) where a < b.
    (b) Express f"(x) by a single formula (possibly including H(x), δ(x) and their variations).
    hw_10_1.jpg



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On 12 Nov 2023, 12:39.