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Frequency domain

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2988: 2974: 286:, such as human speech, can be broken down into its component tones of different frequencies, each represented by a sine wave of a different amplitude and phase. The response of a system, as a function of frequency, can also be described by a complex function. In many applications, phase information is not important. By discarding the phase information, it is possible to simplify the information in a frequency-domain representation to generate a 3012: 3000: 166:
In addition, looking at a system from the point of view of frequency can often give an intuitive understanding of the qualitative behavior of the system, and a revealing scientific nomenclature has grown up to describe it, characterizing the behavior of physical systems to time varying inputs using
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A frequency-domain representation may describe either a static function or a particular time period of a dynamic function (signal or system). The frequency transform of a dynamic function is performed over a finite time period of that function and assumes the function repeats infinitely outside of
314:" frequency domain is spoken of in the singular, there is a number of different mathematical transforms which are used to analyze time-domain functions and are referred to as "frequency domain" methods. These are the most common transforms, and the fields in which they are used: 87:
graph shows how a signal changes over time, whereas a frequency-domain graph shows how the signal is distributed within different frequency bands over a range of frequencies. A complex valued frequency-domain representation consists of both the magnitude and the
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converts the function's time-domain representation, shown in red, to the function's frequency-domain representation, shown in blue. The component frequencies, spread across the frequency spectrum, are represented as peaks in the frequency
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gives rise to a periodic frequency spectrum. In a situation where both these conditions occur, a signal which is discrete and periodic results in a frequency spectrum which is also discrete and periodic; this is the usual context for a
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Goldshleger, N., Shamir, O., Basson, U., Zaady, E. (2019). Frequency Domain Electromagnetic Method (FDEM) as tool to study contamination at the sub-soil layer. Geoscience 9 (9), 382.
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with respect to any transform. The above transforms can be interpreted as capturing some form of frequency, and hence the transform domain is referred to as a frequency domain.
155:, a very important class of systems with many real-world applications, converting the description of the system from the time domain to a frequency domain converts the 151:
One of the main reasons for using a frequency-domain representation of a problem is to simplify the mathematical analysis. For mathematical systems governed by
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used to record and discuss pieces of music is implicitly based on the breaking down of complex sounds into their separate component frequencies (
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that time period. Some specialized signal processing techniques for dynamic functions use transforms that result in a joint
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Boashash, B. (April 1992). "Estimating and Interpreting the Instantaneous Frequency of a Signal-Part I: Fundamentals".
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has energy only at a base frequency and its harmonics; thus it can be analyzed using a discrete frequency domain. A
3016: 2589: 2463: 445:" arose in communication engineering in the 1950s and early 1960s, with "frequency domain" appearing in 1953. See 2647: 2308: 2053: 1424: 1014: 475: 410: 128: 17: 2698: 1910: 1717: 1606: 1564: 99:
A given function or signal can be converted between the time and frequency domains with a pair of mathematical
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of different frequencies, with amplitudes and phases, each of which represents a frequency component. The "
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An example of a field in which frequency-domain analysis gives a better understanding than time domain is
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is a device that displays the spectrum, while the time-domain signal can be seen on an
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Discrete Fourier Analysis and Wavelets: Applications to Signal and Image Processing
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of frequency: the component of the signal at any given frequency is given by a
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response being a key link between the time domain and the frequency domain.
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converts the frequency-domain function back to the time-domain function. A
111:, which converts a time function into a complex valued sum or integral of 2931: 2893: 2576: 2477: 2339: 2152: 2119: 1611: 1528: 1523: 1167: 1124: 1104: 1084: 1074: 843: 531: 442: 348: 322: 255: 84: 80: 52: 44: 1777: 1257: 957: 888: 838: 813: 733: 283: 216: 60: 579: 1930: 1782: 1402: 1197: 1109: 1094: 1089: 1054: 694: 672: 271: 112: 93: 76: 620: 1446: 1064: 941: 936: 931: 632: 208: 204: 200: 116: 2951: 2652: 496: 48: 2873: 1854: 1828: 1808: 1059: 850: 702: 661:
IEEE Transactions on Acoustics, Speech, and Signal Processing
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Journal of the Society for Industrial and Applied Mathematics
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Earliest Known Uses of Some of the Words of Mathematics (T)
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Quantitative EEG analysis methods and clinical applications
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is the relative phase of the wave. For example, using the
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Autoregressive conditional heteroskedasticity (ARCH)
552: 258:, or Fourier transforms, a signal is described by a 2077: 478:for computing periodicity in unevenly spaced data 409:into one having a discrete frequency domain. The 3030: 2163:Multivariate adaptive regression splines (MARS) 580:Shanbao Tong and Nitish Vyomesh Thakor (2009). 472:for computing periodicity in evenly spaced data 529: 79:(and possibly phase), rather than time, as in 718: 441:The use of the terms "frequency domain" and " 607:Zadeh, L. A. (1953), "Theory of Filtering", 384: 763: 725: 711: 1376: 559:. McGraw-Hill Professional. p. 153. 680: 651: 29: 14: 3031: 2689:Kaplan–Meier estimator (product limit) 245: 2762: 2329: 2076: 1375: 1145: 762: 706: 606: 373:More generally, one can speak of the 127:is a tool commonly used to visualize 2999: 2699:Accelerated failure time (AFT) model 3011: 2294:Analysis of variance (ANOVA, anova) 1146: 24: 2389:Cochran–Mantel–Haenszel statistics 1015:Pearson product-moment correlation 645: 436: 163:, which are much easier to solve. 25: 3050: 3010: 2998: 2986: 2973: 2972: 2763: 331:– aperiodic signals, transients. 2648:Least-squares spectral analysis 476:Least-squares spectral analysis 411:discrete-time Fourier transform 1629:Mean-unbiased minimum-variance 732: 626: 600: 573: 546: 523: 393:is a frequency domain that is 13: 1: 2942:Geographic information system 2158:Simultaneous equations models 635:, Jeff Miller, March 25, 2009 553:C. Britton Rorabaugh (1998). 516: 487:Time–frequency representation 465:Blackman–Tukey transformation 153:linear differential equations 146: 2125:Coefficient of determination 1736:Uniformly most powerful test 586:. Artech House. p. 53. 482:Short-time Fourier transform 7: 2694:Proportional hazards models 2638:Spectral density estimation 2620:Vector autoregression (VAR) 2054:Maximum posterior estimator 1286:Randomized controlled trial 452: 447:time domain: origin of term 274:of that component, and the 57:control systems engineering 10: 3055: 2454:Multivariate distributions 874:Average absolute deviation 431:discrete Fourier transform 403:discrete Fourier transform 385:Discrete frequency domain 67:refers to the analysis of 3039:Frequency-domain analysis 2968: 2922: 2859: 2812: 2775: 2771: 2758: 2730: 2712: 2679: 2670: 2628: 2575: 2536: 2485: 2476: 2442:Structural equation model 2397: 2354: 2350: 2325: 2284: 2250: 2204: 2171: 2133: 2100: 2096: 2072: 2012: 1921: 1840: 1804: 1795: 1778:Score/Lagrange multiplier 1763: 1716: 1661: 1587: 1578: 1388: 1384: 1371: 1330: 1304: 1256: 1211: 1193:Sample size determination 1158: 1154: 1141: 1045: 1000: 974: 956: 912: 864: 784: 775: 771: 758: 740: 652:Boashash, B. (Sep 1988). 405:maps a function having a 391:discrete frequency domain 357:digital signal processing 131:in the frequency domain. 121:inverse Fourier transform 2937:Environmental statistics 2459:Elliptical distributions 2252:Generalized linear model 2181:Simple linear regression 1951:Hodges–Lehmann estimator 1408:Probability distribution 1317:Stochastic approximation 879:Coefficient of variation 506:digital image processing 365: â€” image analysis, 305: 2597:Cross-correlation (XCF) 2205:Non-standard predictors 1639:Lehmann–ScheffĂ© theorem 1312:Adaptive clinical trial 683:Proceedings of the IEEE 492:Time–frequency analysis 141:instantaneous frequency 2993:Mathematics portal 2814:Engineering statistics 2722:Nelson–Aalen estimator 2299:Analysis of covariance 2186:Ordinary least squares 2110:Pearson product-moment 1514:Statistical functional 1425:Empirical distribution 1258:Controlled experiments 987:Frequency distribution 765:Descriptive statistics 213:power spectral density 157:differential equations 69:mathematical functions 40: 2909:Population statistics 2851:System identification 2585:Autocorrelation (ACF) 2513:Exponential smoothing 2427:Discriminant analysis 2422:Canonical correlation 2286:Partition of variance 2148:Regression validation 1992:(Jonckheere–Terpstra) 1891:Likelihood-ratio test 1580:Frequentist inference 1492:Location–scale family 1413:Sampling distribution 1378:Statistical inference 1345:Cross-sectional study 1332:Observational studies 1291:Randomized experiment 1120:Stem-and-leaf display 922:Central limit theorem 415:discrete-time signals 270:of the number is the 137:time–frequency domain 107:. An example is the 33: 27:Signal representation 2832:Probabilistic design 2417:Principal components 2260:Exponential families 2212:Nonlinear regression 2191:General linear model 2153:Mixed effects models 2143:Errors and residuals 2120:Confounding variable 2022:Bayesian probability 2000:Van der Waerden test 1990:Ordered alternative 1755:Multiple comparisons 1634:Rao–Blackwellization 1597:Estimating equations 1553:Statistical distance 1271:Factorial experiment 804:Arithmetic-Geometric 426:discrete-time signal 407:discrete time domain 401:. For example, the 321:– periodic signals, 185:resonant frequencies 2904:Official statistics 2827:Methods engineering 2508:Seasonal adjustment 2276:Poisson regressions 2196:Bayesian regression 2135:Regression analysis 2115:Partial correlation 2087:Regression analysis 1686:Prediction interval 1681:Likelihood interval 1671:Confidence interval 1663:Interval estimation 1624:Unbiased estimators 1442:Model specification 1322:Up-and-down designs 1010:Partial correlation 966:Index of dispersion 884:Interquartile range 339:electronic circuits 246:Magnitude and phase 161:algebraic equations 2924:Spatial statistics 2804:Medical statistics 2704:First hitting time 2658:Whittle likelihood 2309:Degrees of freedom 2304:Multivariate ANOVA 2237:Heteroscedasticity 2049:Bayesian estimator 2014:Bayesian inference 1863:Kolmogorov–Smirnov 1748:Randomization test 1718:Testing hypotheses 1691:Tolerance interval 1602:Maximum likelihood 1497:Exponential family 1430:Density estimation 1390:Statistical theory 1350:Natural experiment 1296:Scientific control 1213:Survey methodology 899:Standard deviation 530:Broughton, S. A.; 510:signal compression 288:frequency spectrum 173:frequency response 129:electronic signals 41: 3026: 3025: 2964: 2963: 2960: 2959: 2899:National accounts 2869:Actuarial science 2861:Social statistics 2754: 2753: 2750: 2749: 2746: 2745: 2681:Survival function 2666: 2665: 2528:Granger causality 2369:Contingency table 2344:Survival analysis 2321: 2320: 2317: 2316: 2173:Linear regression 2068: 2067: 2064: 2063: 2039:Credible interval 2008: 2007: 1791: 1790: 1607:Method of moments 1476:Parametric family 1437:Statistical model 1367: 1366: 1363: 1362: 1281:Random assignment 1203:Statistical power 1137: 1136: 1133: 1132: 982:Contingency table 952: 951: 819:Generalized/power 593:978-1-59693-204-3 566:978-0-07-054004-0 502:Wavelet transform 363:Wavelet transform 335:Laplace transform 329:Fourier transform 296:spectrum analyzer 280:Fourier transform 125:spectrum analyzer 109:Fourier transform 83:. Put simply, a 36:Fourier transform 16:(Redirected from 3046: 3014: 3013: 3002: 3001: 2991: 2990: 2976: 2975: 2879:Crime statistics 2773: 2772: 2760: 2759: 2677: 2676: 2643:Fourier analysis 2630:Frequency domain 2610: 2557: 2523:Structural break 2483: 2482: 2432:Cluster analysis 2379:Log-linear model 2352: 2351: 2327: 2326: 2268: 2242:Homoscedasticity 2098: 2097: 2074: 2073: 1993: 1985: 1977: 1976:(Kruskal–Wallis) 1961: 1946: 1901:Cross validation 1886: 1868:Anderson–Darling 1815: 1802: 1801: 1773:Likelihood-ratio 1765:Parametric tests 1743:Permutation test 1726:1- & 2-tails 1617:Minimum distance 1589:Point estimation 1585: 1584: 1536:Optimal decision 1487: 1386: 1385: 1373: 1372: 1355:Quasi-experiment 1305:Adaptive designs 1156: 1155: 1143: 1142: 1020:Rank correlation 782: 781: 773: 772: 760: 759: 727: 720: 713: 704: 703: 698: 695:10.1109/5.135376 676: 673:10.1109/29.90380 667:(9): 1518–1521. 658: 636: 630: 624: 623: 604: 598: 597: 577: 571: 570: 550: 544: 543: 527: 470:Fourier analysis 379: 378: 377:transform domain 367:data compression 292:spectral density 260:complex function 236:musical notation 75:with respect to 65:frequency domain 21: 3054: 3053: 3049: 3048: 3047: 3045: 3044: 3043: 3029: 3028: 3027: 3022: 2985: 2956: 2918: 2855: 2841:quality control 2808: 2790:Clinical trials 2767: 2742: 2726: 2714:Hazard function 2708: 2662: 2624: 2608: 2571: 2567:Breusch–Godfrey 2555: 2532: 2472: 2447:Factor analysis 2393: 2374:Graphical model 2346: 2313: 2280: 2266: 2246: 2200: 2167: 2129: 2092: 2091: 2060: 2004: 1991: 1983: 1975: 1959: 1944: 1923:Rank statistics 1917: 1896:Model selection 1884: 1842:Goodness of fit 1836: 1813: 1787: 1759: 1712: 1657: 1646:Median unbiased 1574: 1485: 1418:Order statistic 1380: 1359: 1326: 1300: 1252: 1207: 1150: 1148:Data collection 1129: 1041: 996: 970: 948: 908: 860: 777:Continuous data 767: 754: 736: 731: 656: 648: 646:Further reading 640: 639: 631: 627: 621:10.1137/0101003 605: 601: 594: 578: 574: 567: 551: 547: 528: 524: 519: 514: 455: 439: 437:History of term 422:periodic signal 387: 376: 375: 343:control systems 308: 248: 193:resonance width 149: 28: 23: 22: 18:Frequency space 15: 12: 11: 5: 3052: 3042: 3041: 3024: 3023: 3021: 3020: 3008: 2996: 2982: 2969: 2966: 2965: 2962: 2961: 2958: 2957: 2955: 2954: 2949: 2944: 2939: 2934: 2928: 2926: 2920: 2919: 2917: 2916: 2911: 2906: 2901: 2896: 2891: 2886: 2881: 2876: 2871: 2865: 2863: 2857: 2856: 2854: 2853: 2848: 2843: 2834: 2829: 2824: 2818: 2816: 2810: 2809: 2807: 2806: 2801: 2796: 2787: 2785:Bioinformatics 2781: 2779: 2769: 2768: 2756: 2755: 2752: 2751: 2748: 2747: 2744: 2743: 2741: 2740: 2734: 2732: 2728: 2727: 2725: 2724: 2718: 2716: 2710: 2709: 2707: 2706: 2701: 2696: 2691: 2685: 2683: 2674: 2668: 2667: 2664: 2663: 2661: 2660: 2655: 2650: 2645: 2640: 2634: 2632: 2626: 2625: 2623: 2622: 2617: 2612: 2604: 2599: 2594: 2593: 2592: 2590:partial (PACF) 2581: 2579: 2573: 2572: 2570: 2569: 2564: 2559: 2551: 2546: 2540: 2538: 2537:Specific tests 2534: 2533: 2531: 2530: 2525: 2520: 2515: 2510: 2505: 2500: 2495: 2489: 2487: 2480: 2474: 2473: 2471: 2470: 2469: 2468: 2467: 2466: 2451: 2450: 2449: 2439: 2437:Classification 2434: 2429: 2424: 2419: 2414: 2409: 2403: 2401: 2395: 2394: 2392: 2391: 2386: 2384:McNemar's test 2381: 2376: 2371: 2366: 2360: 2358: 2348: 2347: 2323: 2322: 2319: 2318: 2315: 2314: 2312: 2311: 2306: 2301: 2296: 2290: 2288: 2282: 2281: 2279: 2278: 2262: 2256: 2254: 2248: 2247: 2245: 2244: 2239: 2234: 2229: 2224: 2222:Semiparametric 2219: 2214: 2208: 2206: 2202: 2201: 2199: 2198: 2193: 2188: 2183: 2177: 2175: 2169: 2168: 2166: 2165: 2160: 2155: 2150: 2145: 2139: 2137: 2131: 2130: 2128: 2127: 2122: 2117: 2112: 2106: 2104: 2094: 2093: 2090: 2089: 2084: 2078: 2070: 2069: 2066: 2065: 2062: 2061: 2059: 2058: 2057: 2056: 2046: 2041: 2036: 2035: 2034: 2029: 2018: 2016: 2010: 2009: 2006: 2005: 2003: 2002: 1997: 1996: 1995: 1987: 1979: 1963: 1960:(Mann–Whitney) 1955: 1954: 1953: 1940: 1939: 1938: 1927: 1925: 1919: 1918: 1916: 1915: 1914: 1913: 1908: 1903: 1893: 1888: 1885:(Shapiro–Wilk) 1880: 1875: 1870: 1865: 1860: 1852: 1846: 1844: 1838: 1837: 1835: 1834: 1826: 1817: 1805: 1799: 1797:Specific tests 1793: 1792: 1789: 1788: 1786: 1785: 1780: 1775: 1769: 1767: 1761: 1760: 1758: 1757: 1752: 1751: 1750: 1740: 1739: 1738: 1728: 1722: 1720: 1714: 1713: 1711: 1710: 1709: 1708: 1703: 1693: 1688: 1683: 1678: 1673: 1667: 1665: 1659: 1658: 1656: 1655: 1650: 1649: 1648: 1643: 1642: 1641: 1636: 1621: 1620: 1619: 1614: 1609: 1604: 1593: 1591: 1582: 1576: 1575: 1573: 1572: 1567: 1562: 1561: 1560: 1550: 1545: 1544: 1543: 1533: 1532: 1531: 1526: 1521: 1511: 1506: 1501: 1500: 1499: 1494: 1489: 1473: 1472: 1471: 1466: 1461: 1451: 1450: 1449: 1444: 1434: 1433: 1432: 1422: 1421: 1420: 1410: 1405: 1400: 1394: 1392: 1382: 1381: 1369: 1368: 1365: 1364: 1361: 1360: 1358: 1357: 1352: 1347: 1342: 1336: 1334: 1328: 1327: 1325: 1324: 1319: 1314: 1308: 1306: 1302: 1301: 1299: 1298: 1293: 1288: 1283: 1278: 1273: 1268: 1262: 1260: 1254: 1253: 1251: 1250: 1248:Standard error 1245: 1240: 1235: 1234: 1233: 1228: 1217: 1215: 1209: 1208: 1206: 1205: 1200: 1195: 1190: 1185: 1180: 1178:Optimal design 1175: 1170: 1164: 1162: 1152: 1151: 1139: 1138: 1135: 1134: 1131: 1130: 1128: 1127: 1122: 1117: 1112: 1107: 1102: 1097: 1092: 1087: 1082: 1077: 1072: 1067: 1062: 1057: 1051: 1049: 1043: 1042: 1040: 1039: 1034: 1033: 1032: 1027: 1017: 1012: 1006: 1004: 998: 997: 995: 994: 989: 984: 978: 976: 975:Summary tables 972: 971: 969: 968: 962: 960: 954: 953: 950: 949: 947: 946: 945: 944: 939: 934: 924: 918: 916: 910: 909: 907: 906: 901: 896: 891: 886: 881: 876: 870: 868: 862: 861: 859: 858: 853: 848: 847: 846: 841: 836: 831: 826: 821: 816: 811: 809:Contraharmonic 806: 801: 790: 788: 779: 769: 768: 756: 755: 753: 752: 747: 741: 738: 737: 730: 729: 722: 715: 707: 701: 700: 689:(4): 519–538. 678: 647: 644: 638: 637: 625: 599: 592: 572: 565: 545: 521: 520: 518: 515: 513: 512: 499: 494: 489: 484: 479: 473: 467: 462: 456: 454: 451: 438: 435: 386: 383: 371: 370: 360: 346: 332: 326: 319:Fourier series 307: 304: 264:complex number 247: 244: 197:damping factor 167:terms such as 148: 145: 26: 9: 6: 4: 3: 2: 3051: 3040: 3037: 3036: 3034: 3019: 3018: 3009: 3007: 3006: 2997: 2995: 2994: 2989: 2983: 2981: 2980: 2971: 2970: 2967: 2953: 2950: 2948: 2947:Geostatistics 2945: 2943: 2940: 2938: 2935: 2933: 2930: 2929: 2927: 2925: 2921: 2915: 2914:Psychometrics 2912: 2910: 2907: 2905: 2902: 2900: 2897: 2895: 2892: 2890: 2887: 2885: 2882: 2880: 2877: 2875: 2872: 2870: 2867: 2866: 2864: 2862: 2858: 2852: 2849: 2847: 2844: 2842: 2838: 2835: 2833: 2830: 2828: 2825: 2823: 2820: 2819: 2817: 2815: 2811: 2805: 2802: 2800: 2797: 2795: 2791: 2788: 2786: 2783: 2782: 2780: 2778: 2777:Biostatistics 2774: 2770: 2766: 2761: 2757: 2739: 2738:Log-rank test 2736: 2735: 2733: 2729: 2723: 2720: 2719: 2717: 2715: 2711: 2705: 2702: 2700: 2697: 2695: 2692: 2690: 2687: 2686: 2684: 2682: 2678: 2675: 2673: 2669: 2659: 2656: 2654: 2651: 2649: 2646: 2644: 2641: 2639: 2636: 2635: 2633: 2631: 2627: 2621: 2618: 2616: 2613: 2611: 2609:(Box–Jenkins) 2605: 2603: 2600: 2598: 2595: 2591: 2588: 2587: 2586: 2583: 2582: 2580: 2578: 2574: 2568: 2565: 2563: 2562:Durbin–Watson 2560: 2558: 2552: 2550: 2547: 2545: 2544:Dickey–Fuller 2542: 2541: 2539: 2535: 2529: 2526: 2524: 2521: 2519: 2518:Cointegration 2516: 2514: 2511: 2509: 2506: 2504: 2501: 2499: 2496: 2494: 2493:Decomposition 2491: 2490: 2488: 2484: 2481: 2479: 2475: 2465: 2462: 2461: 2460: 2457: 2456: 2455: 2452: 2448: 2445: 2444: 2443: 2440: 2438: 2435: 2433: 2430: 2428: 2425: 2423: 2420: 2418: 2415: 2413: 2410: 2408: 2405: 2404: 2402: 2400: 2396: 2390: 2387: 2385: 2382: 2380: 2377: 2375: 2372: 2370: 2367: 2365: 2364:Cohen's kappa 2362: 2361: 2359: 2357: 2353: 2349: 2345: 2341: 2337: 2333: 2328: 2324: 2310: 2307: 2305: 2302: 2300: 2297: 2295: 2292: 2291: 2289: 2287: 2283: 2277: 2273: 2269: 2263: 2261: 2258: 2257: 2255: 2253: 2249: 2243: 2240: 2238: 2235: 2233: 2230: 2228: 2225: 2223: 2220: 2218: 2217:Nonparametric 2215: 2213: 2210: 2209: 2207: 2203: 2197: 2194: 2192: 2189: 2187: 2184: 2182: 2179: 2178: 2176: 2174: 2170: 2164: 2161: 2159: 2156: 2154: 2151: 2149: 2146: 2144: 2141: 2140: 2138: 2136: 2132: 2126: 2123: 2121: 2118: 2116: 2113: 2111: 2108: 2107: 2105: 2103: 2099: 2095: 2088: 2085: 2083: 2080: 2079: 2075: 2071: 2055: 2052: 2051: 2050: 2047: 2045: 2042: 2040: 2037: 2033: 2030: 2028: 2025: 2024: 2023: 2020: 2019: 2017: 2015: 2011: 2001: 1998: 1994: 1988: 1986: 1980: 1978: 1972: 1971: 1970: 1967: 1966:Nonparametric 1964: 1962: 1956: 1952: 1949: 1948: 1947: 1941: 1937: 1936:Sample median 1934: 1933: 1932: 1929: 1928: 1926: 1924: 1920: 1912: 1909: 1907: 1904: 1902: 1899: 1898: 1897: 1894: 1892: 1889: 1887: 1881: 1879: 1876: 1874: 1871: 1869: 1866: 1864: 1861: 1859: 1857: 1853: 1851: 1848: 1847: 1845: 1843: 1839: 1833: 1831: 1827: 1825: 1823: 1818: 1816: 1811: 1807: 1806: 1803: 1800: 1798: 1794: 1784: 1781: 1779: 1776: 1774: 1771: 1770: 1768: 1766: 1762: 1756: 1753: 1749: 1746: 1745: 1744: 1741: 1737: 1734: 1733: 1732: 1729: 1727: 1724: 1723: 1721: 1719: 1715: 1707: 1704: 1702: 1699: 1698: 1697: 1694: 1692: 1689: 1687: 1684: 1682: 1679: 1677: 1674: 1672: 1669: 1668: 1666: 1664: 1660: 1654: 1651: 1647: 1644: 1640: 1637: 1635: 1632: 1631: 1630: 1627: 1626: 1625: 1622: 1618: 1615: 1613: 1610: 1608: 1605: 1603: 1600: 1599: 1598: 1595: 1594: 1592: 1590: 1586: 1583: 1581: 1577: 1571: 1568: 1566: 1563: 1559: 1556: 1555: 1554: 1551: 1549: 1546: 1542: 1541:loss function 1539: 1538: 1537: 1534: 1530: 1527: 1525: 1522: 1520: 1517: 1516: 1515: 1512: 1510: 1507: 1505: 1502: 1498: 1495: 1493: 1490: 1488: 1482: 1479: 1478: 1477: 1474: 1470: 1467: 1465: 1462: 1460: 1457: 1456: 1455: 1452: 1448: 1445: 1443: 1440: 1439: 1438: 1435: 1431: 1428: 1427: 1426: 1423: 1419: 1416: 1415: 1414: 1411: 1409: 1406: 1404: 1401: 1399: 1396: 1395: 1393: 1391: 1387: 1383: 1379: 1374: 1370: 1356: 1353: 1351: 1348: 1346: 1343: 1341: 1338: 1337: 1335: 1333: 1329: 1323: 1320: 1318: 1315: 1313: 1310: 1309: 1307: 1303: 1297: 1294: 1292: 1289: 1287: 1284: 1282: 1279: 1277: 1274: 1272: 1269: 1267: 1264: 1263: 1261: 1259: 1255: 1249: 1246: 1244: 1243:Questionnaire 1241: 1239: 1236: 1232: 1229: 1227: 1224: 1223: 1222: 1219: 1218: 1216: 1214: 1210: 1204: 1201: 1199: 1196: 1194: 1191: 1189: 1186: 1184: 1181: 1179: 1176: 1174: 1171: 1169: 1166: 1165: 1163: 1161: 1157: 1153: 1149: 1144: 1140: 1126: 1123: 1121: 1118: 1116: 1113: 1111: 1108: 1106: 1103: 1101: 1098: 1096: 1093: 1091: 1088: 1086: 1083: 1081: 1078: 1076: 1073: 1071: 1070:Control chart 1068: 1066: 1063: 1061: 1058: 1056: 1053: 1052: 1050: 1048: 1044: 1038: 1035: 1031: 1028: 1026: 1023: 1022: 1021: 1018: 1016: 1013: 1011: 1008: 1007: 1005: 1003: 999: 993: 990: 988: 985: 983: 980: 979: 977: 973: 967: 964: 963: 961: 959: 955: 943: 940: 938: 935: 933: 930: 929: 928: 925: 923: 920: 919: 917: 915: 911: 905: 902: 900: 897: 895: 892: 890: 887: 885: 882: 880: 877: 875: 872: 871: 869: 867: 863: 857: 854: 852: 849: 845: 842: 840: 837: 835: 832: 830: 827: 825: 822: 820: 817: 815: 812: 810: 807: 805: 802: 800: 797: 796: 795: 792: 791: 789: 787: 783: 780: 778: 774: 770: 766: 761: 757: 751: 748: 746: 743: 742: 739: 735: 728: 723: 721: 716: 714: 709: 708: 705: 696: 692: 688: 684: 679: 674: 670: 666: 662: 655: 650: 649: 643: 634: 629: 622: 618: 614: 610: 603: 595: 589: 585: 584: 576: 568: 562: 558: 557: 549: 542:. p. 72. 541: 537: 533: 526: 522: 511: 507: 503: 500: 498: 495: 493: 490: 488: 485: 483: 480: 477: 474: 471: 468: 466: 463: 461: 458: 457: 450: 449:for details. 448: 444: 434: 432: 427: 423: 418: 416: 412: 408: 404: 400: 396: 392: 382: 380: 368: 364: 361: 358: 354: 353:discrete-time 350: 347: 344: 340: 336: 333: 330: 327: 324: 320: 317: 316: 315: 313: 303: 301: 297: 293: 289: 285: 281: 277: 273: 269: 265: 261: 257: 253: 250:In using the 243: 241: 240:musical notes 237: 233: 228: 226: 222: 218: 214: 210: 206: 202: 198: 194: 190: 189:time constant 186: 182: 178: 174: 170: 164: 162: 158: 154: 144: 142: 138: 132: 130: 126: 122: 118: 114: 110: 106: 102: 97: 95: 91: 86: 82: 78: 74: 70: 66: 62: 58: 54: 50: 46: 37: 32: 19: 3015: 3003: 2984: 2977: 2889:Econometrics 2839: / 2822:Chemometrics 2799:Epidemiology 2792: / 2765:Applications 2629: 2607:ARIMA model 2554:Q-statistic 2503:Stationarity 2399:Multivariate 2342: / 2338: / 2336:Multivariate 2334: / 2274: / 2270: / 2044:Bayes factor 1943:Signed rank 1855: 1829: 1821: 1809: 1504:Completeness 1340:Cohort study 1238:Opinion poll 1173:Missing data 1160:Study design 1115:Scatter plot 1037:Scatter plot 1030:Spearman's ρ 992:Grouped data 686: 682: 664: 660: 641: 628: 612: 608: 602: 582: 575: 555: 548: 538:. New York: 535: 525: 440: 419: 397:rather than 390: 388: 374: 372: 311: 309: 300:oscilloscope 249: 229: 165: 150: 133: 98: 92:of a set of 64: 42: 3017:WikiProject 2932:Cartography 2894:Jurimetrics 2846:Reliability 2577:Time domain 2556:(Ljung–Box) 2478:Time-series 2356:Categorical 2340:Time-series 2332:Categorical 2267:(Bernoulli) 2102:Correlation 2082:Correlation 1878:Jarque–Bera 1850:Chi-squared 1612:M-estimator 1565:Asymptotics 1509:Sufficiency 1276:Interaction 1188:Replication 1168:Effect size 1125:Violin plot 1105:Radar chart 1085:Forest plot 1075:Correlogram 1025:Kendall's τ 443:time domain 349:Z transform 323:oscillating 217:eigenvalues 181:phase shift 139:, with the 85:time-domain 81:time series 53:electronics 45:mathematics 2884:Demography 2602:ARMA model 2407:Regression 1984:(Friedman) 1945:(Wilcoxon) 1883:Normality 1873:Lilliefors 1820:Student's 1696:Resampling 1570:Robustness 1558:divergence 1548:Efficiency 1486:(monotone) 1481:Likelihood 1398:Population 1231:Stratified 1183:Population 1002:Dependence 958:Count data 889:Percentile 866:Dispersion 799:Arithmetic 734:Statistics 556:DSP primer 517:References 399:continuous 310:Although " 284:sound wave 147:Advantages 113:sine waves 105:transforms 61:statistics 2265:Logistic 2032:posterior 1958:Rank sum 1706:Jackknife 1701:Bootstrap 1519:Bootstrap 1454:Parameter 1403:Statistic 1198:Statistic 1110:Run chart 1095:Pie chart 1090:Histogram 1080:Fan chart 1055:Bar chart 937:L-moments 824:Geometric 615:: 35–51, 532:Bryan, K. 460:Bandwidth 355:signals, 272:amplitude 205:harmonics 169:bandwidth 101:operators 94:sinusoids 77:frequency 3033:Category 2979:Category 2672:Survival 2549:Johansen 2272:Binomial 2227:Isotonic 1814:(normal) 1459:location 1266:Blocking 1221:Sampling 1100:Q–Q plot 1065:Box plot 1047:Graphics 942:Skewness 932:Kurtosis 904:Variance 834:Heronian 829:Harmonic 534:(2008). 453:See also 395:discrete 325:systems. 294:. A 276:argument 209:spectrum 201:Q factor 117:spectrum 3005:Commons 2952:Kriging 2837:Process 2794:studies 2653:Wavelet 2486:General 1653:Plug-in 1447:L space 1226:Cluster 927:Moments 745:Outline 497:Wavelet 268:modulus 252:Laplace 103:called 73:signals 49:physics 39:domain. 2874:Census 2464:Normal 2412:Manova 2232:Robust 1982:2-way 1974:1-way 1812:-test 1483:  1060:Biplot 851:Median 844:Lehmer 786:Center 590:  563:  266:. The 223:, and 63:, the 59:, and 2498:Trend 2027:prior 1969:anova 1858:-test 1832:-test 1824:-test 1731:Power 1676:Pivot 1469:shape 1464:scale 914:Shape 894:Range 839:Heinz 814:Cubic 750:Index 657:(PDF) 540:Wiley 306:Types 232:music 225:zeros 221:poles 90:phase 2731:Test 1931:Sign 1783:Wald 856:Mode 794:Mean 588:ISBN 561:ISBN 341:and 282:, a 177:gain 34:The 1911:BIC 1906:AIC 691:doi 669:doi 617:doi 312:the 290:or 242:). 159:to 71:or 43:In 3035:: 687:80 685:. 665:36 663:. 659:. 611:, 508:, 504:– 433:. 420:A 389:A 351:– 337:– 302:. 256:Z- 254:, 227:. 219:, 215:, 211:, 207:, 203:, 199:, 195:, 191:, 187:, 183:, 179:, 175:, 171:, 55:, 51:, 47:, 1856:G 1830:F 1822:t 1810:Z 1529:V 1524:U 726:e 719:t 712:v 699:. 697:. 693:: 677:. 675:. 671:: 619:: 613:1 596:. 569:. 369:. 359:. 345:. 20:)

Index

Frequency space

Fourier transform
mathematics
physics
electronics
control systems engineering
statistics
mathematical functions
signals
frequency
time series
time-domain
phase
sinusoids
operators
transforms
Fourier transform
sine waves
spectrum
inverse Fourier transform
spectrum analyzer
electronic signals
time–frequency domain
instantaneous frequency
linear differential equations
differential equations
algebraic equations
bandwidth
frequency response

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