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Fourier Analysis of VWIGX (Vanguard International Growth F)


VWIGX (Vanguard International Growth F) appears to have interesting cyclic behaviour every 154 weeks (.7834*sine), 142 weeks (.7665*sine), and 167 weeks (.571*cosine).

VWIGX (Vanguard International Growth F) has an average price of 9.58 (topmost row, frequency = 0).



Click on the checkboxes shown on the right to see how the various frequencies contribute to the graph. Look for large magnitude coefficients (sine or cosine), as these are associated with frequencies which contribute most to the associated stock plot. If you find a large magnitude coefficient which dramatically changes the graph, look at the associated "Period" in weeks, as you may have found a significant recurring cycle for the stock of interest.

Right click on the graph above to see the menu of operations (download, full screen, etc.)

Fourier Analysis

Using data from 9/30/1981 to 1/17/2017 for VWIGX (Vanguard International Growth F), this program was able to calculate the following Fourier Series:
Sequence #Cosine Coefficients Sine Coefficients FrequenciesPeriod
09.57875   0 
11.38597 -6.494 (1*2π)/18421,842 weeks
2.44208 -3.47849 (2*2π)/1842921 weeks
3-.13302 -1.86334 (3*2π)/1842614 weeks
4.77657 -2.54586 (4*2π)/1842461 weeks
5-.86517 -1.89045 (5*2π)/1842368 weeks
6-.11292 -.4541 (6*2π)/1842307 weeks
7.18274 -1.1126 (7*2π)/1842263 weeks
8-.09236 -.88743 (8*2π)/1842230 weeks
9-.50814 -.71232 (9*2π)/1842205 weeks
10-.38292 .06895 (10*2π)/1842184 weeks
11.57095 -.4634 (11*2π)/1842167 weeks
12.2564 -.78341 (12*2π)/1842154 weeks
13-.0658 -.7665 (13*2π)/1842142 weeks
14-.09323 -.27565 (14*2π)/1842132 weeks
15.14798 -.30892 (15*2π)/1842123 weeks
16.07582 -.45072 (16*2π)/1842115 weeks
17.03182 -.54683 (17*2π)/1842108 weeks
18-.15262 -.15424 (18*2π)/1842102 weeks
19.23927 -.23406 (19*2π)/184297 weeks
20.13247 -.4873 (20*2π)/184292 weeks
21-.04419 -.38858 (21*2π)/184288 weeks
22-.14489 -.32474 (22*2π)/184284 weeks
23.04666 -.08143 (23*2π)/184280 weeks
24.23736 -.2877 (24*2π)/184277 weeks
25.1456 -.44986 (25*2π)/184274 weeks
26-.08712 -.40369 (26*2π)/184271 weeks
27-.13502 -.26288 (27*2π)/184268 weeks
28-.07745 -.16772 (28*2π)/184266 weeks
29.14589 -.28348 (29*2π)/184264 weeks
30-.01021 -.42389 (30*2π)/184261 weeks
31-.15233 -.24482 (31*2π)/184259 weeks
32-.08423 -.14887 (32*2π)/184258 weeks
33-.04343 -.16559 (33*2π)/184256 weeks
34-.08452 -.22351 (34*2π)/184254 weeks
35-.12317 -.12424 (35*2π)/184253 weeks
36.07533 -.18293 (36*2π)/184251 weeks
37-.04033 -.14202 (37*2π)/184250 weeks
38.06903 -.22857 (38*2π)/184248 weeks
39-.13454 -.17842 (39*2π)/184247 weeks
40-.06846 -.1111 (40*2π)/184246 weeks
41.00998 -.05047 (41*2π)/184245 weeks
42.0533 -.19083 (42*2π)/184244 weeks
43.02505 -.14941 (43*2π)/184243 weeks
44.01101 -.15116 (44*2π)/184242 weeks
45.03929 -.13472 (45*2π)/184241 weeks
46-.01983 -.26646 (46*2π)/184240 weeks
47-.09431 -.19778 (47*2π)/184239 weeks
48-.13166 -.14508 (48*2π)/184238 weeks
49.01157 -.0216 (49*2π)/184238 weeks
50-.02976 -.11432 (50*2π)/184237 weeks
51-.05749 -.1735 (51*2π)/184236 weeks
52-.0488 -.08369 (52*2π)/184235 weeks
53-.02496 -.12854 (53*2π)/184235 weeks
54-.04002 -.05558 (54*2π)/184234 weeks
55-.01209 -.08049 (55*2π)/184233 weeks
56.00417 -.04801 (56*2π)/184233 weeks
57.03496 -.08392 (57*2π)/184232 weeks
58.05076 -.13771 (58*2π)/184232 weeks
59-.0351 -.18281 (59*2π)/184231 weeks
60-.04027 -.07161 (60*2π)/184231 weeks
61-.03224 -.03611 (61*2π)/184230 weeks
62.0447 -.06596 (62*2π)/184230 weeks
63-.01049 -.15595 (63*2π)/184229 weeks
64-.02688 -.07037 (64*2π)/184229 weeks
65.04193 -.09545 (65*2π)/184228 weeks
66.0088 -.12902 (66*2π)/184228 weeks
67-.03782 -.13403 (67*2π)/184227 weeks
68-.02114 -.08173 (68*2π)/184227 weeks
69-.03299 -.12359 (69*2π)/184227 weeks
70-.0304 -.09254 (70*2π)/184226 weeks
71-.05466 -.11899 (71*2π)/184226 weeks
72-.01147 -.02479 (72*2π)/184226 weeks
73.01176 -.10323 (73*2π)/184225 weeks
74-.04827 -.08509 (74*2π)/184225 weeks
75-.05976 -.10658 (75*2π)/184225 weeks
76-.07363 -.0544 (76*2π)/184224 weeks
77-.00299 -.03476 (77*2π)/184224 weeks
78-.03638 -.05317 (78*2π)/184224 weeks
79-.01422 -.01426 (79*2π)/184223 weeks
80.01672 -.04733 (80*2π)/184223 weeks
81.00251 -.05672 (81*2π)/184223 weeks
82-.00412 -.06985 (82*2π)/184222 weeks
83-.01071 -.02599 (83*2π)/184222 weeks
84.04188 -.05947 (84*2π)/184222 weeks
85-.0015 -.07017 (85*2π)/184222 weeks
86.00571 -.03171 (86*2π)/184221 weeks
87.00246 -.00743 (87*2π)/184221 weeks
88.09706 -.08222 (88*2π)/184221 weeks
89.03716 -.12223 (89*2π)/184221 weeks
90-.01708 -.09435 (90*2π)/184220 weeks
91-.04461 -.04968 (91*2π)/184220 weeks
92.03679 -.05025 (92*2π)/184220 weeks
93.02835 -.09777 (93*2π)/184220 weeks
94-.00074 -.08628 (94*2π)/184220 weeks
95.02864 -.02707 (95*2π)/184219 weeks
96.04779 -.10353 (96*2π)/184219 weeks
97.00515 -.10126 (97*2π)/184219 weeks
98-.02064 -.11037 (98*2π)/184219 weeks
99-.02711 -.09167 (99*2π)/184219 weeks
100-.0263 -.0687 (100*2π)/184218 weeks
101.03701 -.07418 (101*2π)/184218 weeks
102-.01893 -.09575 (102*2π)/184218 weeks
103-.02518 -.08003 (103*2π)/184218 weeks
104-.05083 -.0453 (104*2π)/184218 weeks
105.01128 -.07231 (105*2π)/184218 weeks
106-.02442 -.11432 (106*2π)/184217 weeks
107-.04696 -.05874 (107*2π)/184217 weeks
108-.02034 -.0262 (108*2π)/184217 weeks
109.02894 -.04424 (109*2π)/184217 weeks
110-.01253 -.07662 (110*2π)/184217 weeks
111-.05942 -.07546 (111*2π)/184217 weeks
112-.03869 -.02349 (112*2π)/184216 weeks
113.01502 -.00083 (113*2π)/184216 weeks
114.0387 -.03242 (114*2π)/184216 weeks
115.03164 -.09671 (115*2π)/184216 weeks
116-.03952 -.07557 (116*2π)/184216 weeks
117-.01135 -.02927 (117*2π)/184216 weeks
118.00538 -.0519 (118*2π)/184216 weeks
119.01509 -.07807 (119*2π)/184215 weeks
120-.03681 -.05783 (120*2π)/184215 weeks
121-.00486 -.01234 (121*2π)/184215 weeks
122.01087 -.06908 (122*2π)/184215 weeks
123-.0106 -.06962 (123*2π)/184215 weeks
124.00668 -.05955 (124*2π)/184215 weeks
125-.01597 -.05785 (125*2π)/184215 weeks
126-.00782 -.05743 (126*2π)/184215 weeks
127-.04076 -.03907 (127*2π)/184215 weeks
128.00741 -.04606 (128*2π)/184214 weeks
129-.01204 -.0434 (129*2π)/184214 weeks
130.02188 -.05947 (130*2π)/184214 weeks
131-.0218 -.0704 (131*2π)/184214 weeks
132-.01588 -.04278 (132*2π)/184214 weeks
133-.02512 -.0275 (133*2π)/184214 weeks
134.01661 -.03732 (134*2π)/184214 weeks
135.02629 -.08398 (135*2π)/184214 weeks
136-.01454 -.08742 (136*2π)/184214 weeks
137-.0312 -.05309 (137*2π)/184213 weeks
138-.04254 -.04256 (138*2π)/184213 weeks
139-.02181 -.01173 (139*2π)/184213 weeks
140.0181 -.03299 (140*2π)/184213 weeks
141.01434 -.04821 (141*2π)/184213 weeks
142-.00371 -.06744 (142*2π)/184213 weeks
143-.0116 -.05738 (143*2π)/184213 weeks
144-.01319 -.03195 (144*2π)/184213 weeks
145-.00994 -.04797 (145*2π)/184213 weeks
146-.00518 -.03741 (146*2π)/184213 weeks
147.00359 -.05494 (147*2π)/184213 weeks
148.00683 -.04925 (148*2π)/184212 weeks
149.00601 -.07784 (149*2π)/184212 weeks
150-.04541 -.04459 (150*2π)/184212 weeks
151.0077 -.04202 (151*2π)/184212 weeks
152-.01717 -.06978 (152*2π)/184212 weeks
153-.0284 -.06815 (153*2π)/184212 weeks
154-.0251 -.02141 (154*2π)/184212 weeks
155.00399 -.03876 (155*2π)/184212 weeks
156-.03527 -.0522 (156*2π)/184212 weeks
157-.02703 -.0365 (157*2π)/184212 weeks
158-.03357 -.02827 (158*2π)/184212 weeks
159.00281 -.00176 (159*2π)/184212 weeks
160.00195 -.02568 (160*2π)/184212 weeks
161.0117 -.01997 (161*2π)/184211 weeks
162.01971 -.03398 (162*2π)/184211 weeks
163.01969 -.06503 (163*2π)/184211 weeks
164.0025 -.06112 (164*2π)/184211 weeks
165-.00206 -.057 (165*2π)/184211 weeks
166.00369 -.0473 (166*2π)/184211 weeks
167-.0126 -.08016 (167*2π)/184211 weeks
168-.03421 -.04546 (168*2π)/184211 weeks
169-.02406 -.04052 (169*2π)/184211 weeks
170-.00597 -.02529 (170*2π)/184211 weeks
171.00598 -.05446 (171*2π)/184211 weeks
172-.01227 -.06198 (172*2π)/184211 weeks
173-.02605 -.02896 (173*2π)/184211 weeks
174-.00503 -.04722 (174*2π)/184211 weeks
175-.03306 -.06022 (175*2π)/184211 weeks
176-.02531 -.04065 (176*2π)/184210 weeks
177-.01508 -.02888 (177*2π)/184210 weeks
178-.0164 -.0317 (178*2π)/184210 weeks
179-.00759 -.04305 (179*2π)/184210 weeks
180-.02787 -.03203 (180*2π)/184210 weeks
181.00756 -.02965 (181*2π)/184210 weeks
182-.02222 -.04261 (182*2π)/184210 weeks
183-.01635 -.03922 (183*2π)/184210 weeks
184-.02414 -.03093 (184*2π)/184210 weeks
185-.00206 -.03639 (185*2π)/184210 weeks
186-.02905 -.05186 (186*2π)/184210 weeks
187-.0317 -.03752 (187*2π)/184210 weeks
188-.03364 -.01264 (188*2π)/184210 weeks
189-.01173 -.00846 (189*2π)/184210 weeks
190.00821 -.01353 (190*2π)/184210 weeks
191-.00111 -.03428 (191*2π)/184210 weeks
192-.00164 -.03237 (192*2π)/184210 weeks
193-.00887 -.02877 (193*2π)/184210 weeks
194.01334 -.03557 (194*2π)/18429 weeks
195-.01259 -.03886 (195*2π)/18429 weeks
196-.00854 -.04239 (196*2π)/18429 weeks
197-.01988 -.03523 (197*2π)/18429 weeks
198-.01904 -.03419 (198*2π)/18429 weeks
199-.00566 -.04067 (199*2π)/18429 weeks
200-.02511 -.03515 (200*2π)/18429 weeks
201-.01136 -.01573 (201*2π)/18429 weeks
202.00331 -.02888 (202*2π)/18429 weeks
203-.0021 -.03366 (203*2π)/18429 weeks
204-.01558 -.04495 (204*2π)/18429 weeks
205-.02519 -.03607 (205*2π)/18429 weeks
206-.01665 -.01663 (206*2π)/18429 weeks
207-.00565 -.02599 (207*2π)/18429 weeks
208-.00083 -.02374 (208*2π)/18429 weeks
209-.00547 -.03539 (209*2π)/18429 weeks
210-.00973 -.03394 (210*2π)/18429 weeks
211-.00418 -.03638 (211*2π)/18429 weeks
212-.02641 -.03365 (212*2π)/18429 weeks
213-.01021 -.0219 (213*2π)/18429 weeks
214-.01686 -.04188 (214*2π)/18429 weeks
215-.01576 -.01379 (215*2π)/18429 weeks
216-.00251 -.0377 (216*2π)/18429 weeks
217-.00706 -.01389 (217*2π)/18428 weeks
218-.01532 -.03598 (218*2π)/18428 weeks
219-.01856 -.01106 (219*2π)/18428 weeks
220-.00149 -.01888 (220*2π)/18428 weeks
221.00818 -.02221 (221*2π)/18428 weeks
222-.00167 -.04082 (222*2π)/18428 weeks
223.00698 -.03078 (223*2π)/18428 weeks
224-.00846 -.04593 (224*2π)/18428 weeks
225-.01428 -.04369 (225*2π)/18428 weeks
226-.02482 -.03099 (226*2π)/18428 weeks
227-.0125 -.02124 (227*2π)/18428 weeks
228-.01945 -.02314 (228*2π)/18428 weeks
229.00636 -.02439 (229*2π)/18428 weeks
230-.00224 -.02726 (230*2π)/18428 weeks
231.0018 -.04133 (231*2π)/18428 weeks
232-.02499 -.03641 (232*2π)/18428 weeks
233-.01016 -.02846 (233*2π)/18428 weeks
234-.02173 -.02192 (234*2π)/18428 weeks
235-.01302 -.01991 (235*2π)/18428 weeks
236-.00779 -.02116 (236*2π)/18428 weeks
237.00748 -.04128 (237*2π)/18428 weeks
238-.01661 -.04025 (238*2π)/18428 weeks
239-.03335 -.01185 (239*2π)/18428 weeks
240.01945 -.01452 (240*2π)/18428 weeks
241.00257 -.04592 (241*2π)/18428 weeks
242-.01441 -.0398 (242*2π)/18428 weeks
243-.02173 -.02074 (243*2π)/18428 weeks
244-.00712 -.02528 (244*2π)/18428 weeks
245.00182 -.04321 (245*2π)/18428 weeks
246-.02122 -.04164 (246*2π)/18427 weeks
247-.03685 -.02779 (247*2π)/18427 weeks
248-.01932 -.01087 (248*2π)/18427 weeks
249.00248 -.01318 (249*2π)/18427 weeks
250-.01049 -.03907 (250*2π)/18427 weeks
251-.02462 -.03161 (251*2π)/18427 weeks
252-.01379 -.02073 (252*2π)/18427 weeks
253-.01447 -.00834 (253*2π)/18427 weeks
254.01208 -.00899 (254*2π)/18427 weeks
255.00137 -.0341 (255*2π)/18427 weeks
256-.00318 -.03581 (256*2π)/18427 weeks
257-.01291 -.04613 (257*2π)/18427 weeks
258-.02657 -.04256 (258*2π)/18427 weeks
259-.03389 -.02271 (259*2π)/18427 weeks
260-.02718 -.00946 (260*2π)/18427 weeks
261-.00017 -.00169 (261*2π)/18427 weeks
262.00676 -.02722 (262*2π)/18427 weeks
263-.01293 -.04293 (263*2π)/18427 weeks
264-.03412 -.02997 (264*2π)/18427 weeks
265-.01801 -.00512 (265*2π)/18427 weeks
266.00012 -.00365 (266*2π)/18427 weeks
267.00715 -.02382 (267*2π)/18427 weeks
268-.01325 -.03652 (268*2π)/18427 weeks
269-.00471 -.02073 (269*2π)/18427 weeks
270-.00563 -.02509 (270*2π)/18427 weeks
271-.01457 -.03924 (271*2π)/18427 weeks
272-.03159 -.02508 (272*2π)/18427 weeks
273-.01192 -.00564 (273*2π)/18427 weeks
274-.00344 -.00753 (274*2π)/18427 weeks
275.00427 -.02326 (275*2π)/18427 weeks
276-.0001 -.02852 (276*2π)/18427 weeks
277-.00465 -.04345 (277*2π)/18427 weeks
278-.02068 -.02768 (278*2π)/18427 weeks
279-.01911 -.01883 (279*2π)/18427 weeks
280-.00779 -.01911 (280*2π)/18427 weeks
281-.00326 -.01632 (281*2π)/18427 weeks
282.00144 -.02988 (282*2π)/18427 weeks
283-.01001 -.02284 (283*2π)/18427 weeks
284.0017 -.04132 (284*2π)/18426 weeks
285-.02595 -.03983 (285*2π)/18426 weeks
286-.02487 -.01461 (286*2π)/18426 weeks
287-.00733 -.01763 (287*2π)/18426 weeks
288-.00253 -.01788 (288*2π)/18426 weeks
289-.00221 -.03807 (289*2π)/18426 weeks
290-.02049 -.02575 (290*2π)/18426 weeks
291-.01292 -.02087 (291*2π)/18426 weeks
292-.00069 -.02611 (292*2π)/18426 weeks
293-.0083 -.04238 (293*2π)/18426 weeks
294-.02655 -.03928 (294*2π)/18426 weeks
295-.02464 -.01265 (295*2π)/18426 weeks
296-.00442 -.02209 (296*2π)/18426 weeks
297-.02185 -.02543 (297*2π)/18426 weeks
298-.02329 -.02694 (298*2π)/18426 weeks
299-.03075 -.01561 (299*2π)/18426 weeks
300-.00372 -.00635 (300*2π)/18426 weeks
301-.00086 -.02188 (301*2π)/18426 weeks
302-.01775 -.02761 (302*2π)/18426 weeks
303-.02459 -.01966 (303*2π)/18426 weeks
304-.01405 -.01174 (304*2π)/18426 weeks
305-.01134 -.01324 (305*2π)/18426 weeks
306-.00906 -.01867 (306*2π)/18426 weeks
307-.01494 -.02127 (307*2π)/18426 weeks
308-.01585 -.01433 (308*2π)/18426 weeks
309-.00912 -.00918 (309*2π)/18426 weeks
310-.00589 -.01632 (310*2π)/18426 weeks
311-.011 -.02029 (311*2π)/18426 weeks
312-.00753 -.01532 (312*2π)/18426 weeks
313-.01375 -.00937 (313*2π)/18426 weeks
314-.00017 -.01704 (314*2π)/18426 weeks
315-.00233 -.02335 (315*2π)/18426 weeks
316-.00217 -.02292 (316*2π)/18426 weeks
317-.00844 -.03257 (317*2π)/18426 weeks
318-.02112 -.01658 (318*2π)/18426 weeks
319-.01956 -.02581 (319*2π)/18426 weeks
320-.02015 -.00796 (320*2π)/18426 weeks
321-.00109 -.01654 (321*2π)/18426 weeks
322-.01162 -.01556 (322*2π)/18426 weeks
323-.00263 -.02218 (323*2π)/18426 weeks
324-.01153 -.00754 (324*2π)/18426 weeks
325.00636 -.01811 (325*2π)/18426 weeks
326-.00705 -.02323 (326*2π)/18426 weeks
327-.00015 -.02775 (327*2π)/18426 weeks
328-.01904 -.02362 (328*2π)/18426 weeks
329-.00012 -.01144 (329*2π)/18426 weeks
330-.00457 -.03072 (330*2π)/18426 weeks
331-.0082 -.02808 (331*2π)/18426 weeks
332-.01326 -.02491 (332*2π)/18426 weeks
333-.00759 -.0209 (333*2π)/18426 weeks
334-.00631 -.02815 (334*2π)/18426 weeks
335-.00897 -.02818 (335*2π)/18425 weeks
336-.01602 -.02476 (336*2π)/18425 weeks
337-.01021 -.02689 (337*2π)/18425 weeks
338-.01847 -.03366 (338*2π)/18425 weeks
339-.01557 -.02542 (339*2π)/18425 weeks
340-.01778 -.02761 (340*2π)/18425 weeks
341-.02377 -.01874 (341*2π)/18425 weeks
342-.01808 -.01972 (342*2π)/18425 weeks
343-.03198 -.02233 (343*2π)/18425 weeks
344-.01102 -.01078 (344*2π)/18425 weeks
345-.02727 -.02894 (345*2π)/18425 weeks
346-.01815 .00026 (346*2π)/18425 weeks
347-.00912 -.01455 (347*2π)/18425 weeks
348-.0097 -.01273 (348*2π)/18425 weeks
349-.01365 -.02537 (349*2π)/18425 weeks
350-.02093 -.012 (350*2π)/18425 weeks
351-.00704 -.01711 (351*2π)/18425 weeks
352-.01127 -.02133 (352*2π)/18425 weeks
353-.02708 -.01448 (353*2π)/18425 weeks
354-.02205 -.00622 (354*2π)/18425 weeks
355-.00699 -.00149 (355*2π)/18425 weeks
356-.00188 -.01561 (356*2π)/18425 weeks
357-.00728 -.01446 (357*2π)/18425 weeks
358-.00917 -.01676 (358*2π)/18425 weeks
359.00184 -.01064 (359*2π)/18425 weeks
360-.00355 -.02674 (360*2π)/18425 weeks
361-.01431 -.0197 (361*2π)/18425 weeks
362-.01728 -.02037 (362*2π)/18425 weeks
363-.00506 -.01163 (363*2π)/18425 weeks
364-.00151 -.02255 (364*2π)/18425 weeks
365-.00952 -.02216 (365*2π)/18425 weeks
366-.01665 -.02987 (366*2π)/18425 weeks
367-.02041 -.0114 (367*2π)/18425 weeks
368-.00953 -.01978 (368*2π)/18425 weeks
369-.01306 -.01922 (369*2π)/18425 weeks
370-.01793 -.02641 (370*2π)/18425 weeks
371-.02178 -.01431 (371*2π)/18425 weeks
372-.01785 -.01731 (372*2π)/18425 weeks
373-.01322 -.00811 (373*2π)/18425 weeks
374-.00503 -.02529 (374*2π)/18425 weeks
375-.0262 -.01895 (375*2π)/18425 weeks
376-.01859 -.00499 (376*2π)/18425 weeks
377-.01396 -.00823 (377*2π)/18425 weeks
378-.00767 -.01737 (378*2π)/18425 weeks
379-.01675 -.01195 (379*2π)/18425 weeks
380-.00601 -.00602 (380*2π)/18425 weeks
381.00072 -.01891 (381*2π)/18425 weeks
382-.02062 -.02723 (382*2π)/18425 weeks
383-.02637 -.02035 (383*2π)/18425 weeks
384-.02959 -.0045 (384*2π)/18425 weeks
385-.00159 .00143 (385*2π)/18425 weeks
386-.00932 -.00954 (386*2π)/18425 weeks
387.00039 -.01282 (387*2π)/18425 weeks
388-.01807 -.01508 (388*2π)/18425 weeks
389-.00642 -.00671 (389*2π)/18425 weeks
390-.00014 -.0141 (390*2π)/18425 weeks
391-.00304 -.02545 (391*2π)/18425 weeks
392-.01522 -.02064 (392*2π)/18425 weeks
393-.00776 -.0141 (393*2π)/18425 weeks
394-.01053 -.02111 (394*2π)/18425 weeks
395-.01911 -.02576 (395*2π)/18425 weeks
396-.02495 -.00776 (396*2π)/18425 weeks
397-.0066 -.00607 (397*2π)/18425 weeks
398-.00522 -.01343 (398*2π)/18425 weeks
399-.01169 -.02259 (399*2π)/18425 weeks
400-.01669 -.01484 (400*2π)/18425 weeks
401-.0078 -.01923 (401*2π)/18425 weeks
402-.02137